U.S. PATENT AND TRADEMARK OFFICE
Information Products Division |
U.S. Patent Classification System - Classification Definitions
as of June 30, 2000
Patents classified in a subclass may be accessed by either clicking on
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(definitions have been obtained from the
Patents ASSIST CD-ROM which
is produced by the U.S. Patent and Trademark Office
Electronic Products Branch)
Class 192
CLUTCHES AND POWER-STOP CONTROL
Class Definition:
This class includes clutches, combinations including vortex
flow drive and clutch, vortex flow drive and brake, clutch
and brake, and clutch and gear; and also includes mechanism
for joint control of transmission and clutch, and
transmission and brake.
This class includes the control of those various
power-transmission means, motors, and brakes the motions of
which occur at the completion of a cycle of operations or
which are due to contact with the material handled by the
machine or to the defective action of the parts of the
machine operated or to such operations as arise from the
initiation of measures for the safety of the operator.
This class is also the generic locus for clutches and brakes
(see below for subclass references).
SEE OR SEARCH THIS CLASS, SUBCLASS:
21.5 107+, for both clutches and brakes of the subject matter
herein classified.
REFERENCES TO OTHER CLASSES
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, appropriate subclasses,
especially 640+ for clutches or brakes and clutches used to
modify or control a gearing organization, where specific
gearing structure is claimed.
180, Motor Vehicles, 6.2 for various clutch and brake
arrangements providing for steering by driving, where some
specific steering by driving vehicle structure is claimed.
188, Brakes, appropriate subclasses for motor vehicle mounted
brakes used in association with clutches, where the clutch is
not claimed.
234, Selective Cutting (e.g., Punching), appropriate
subclasses, for the starting and stopping of a selective
cutting machine in response to various predetermined
conditions; especially subclass 21 for means to stop after a
given number of operations, and subclass 51 for unicyclic or
nonrepeat drive means.
242, Winding, Tensioning, or Guiding, 257 for a clutch in a
fishing reel, subclasses 264+ for a releasable coupling in a
fishing reel, subclass 356.6 for a one-way clutch in the
drive of a winder of an information bearing carrier,
subclasses 394+ for a clutch in a reeling device of general
use, subclasses 484.6+ for a helical winding machine drive
which may include a clutch, and subclasses 545+ for a clutch
in the drive on a convolute winding machine in which
particular winding or unwinding structure is specified.
399, Electrophotography, subclass 210 for damping or braking
a slit exposure scanning carriage.
418, Rotary Expansible Chamber Devices, subclass 69, for
rotary expansible chamber devices combined with a nominally
claimed clutch device.
475, Planetary Gear Transmission Systems or Components,
appropriate subclasses, for clutches or brakes and clutches
used to modify or control a planetary gearing organization.
477, Interrelated Power Delivery Controls, Including Engine
Control, for interrelated control between an engine and a
transmission, clutch, or brake.
SUBCLASSES
Subclass:
3.21
This subclass is indented under the class definition.
Apparatus comprising the combination of a clutch under the
... and a device described in (1) Note below as a
"Vortex-Flow Drive".
(1) Note. For the purposes of this subclass (3.21) and
subclass 3.34 below, a "Vortex-Flow Drive" is defined as a
device for transmitting torque from a first, rotating shaft
to a second, coaxial rotatable shaft, to which shafts are
secured shroud elements, each of which is generally concave
(e.g., hemispherical or hemitoroidal) and provided with
generally radial vanes secured within the concavity, the
elements being capable of rotation relative to one another,
but together forming a spheroidal or toroidal enclosure for a
mass of liquid material, in which device rotation of the
first shaft (and of the vanes carried thereby) causes
particles of the liquid mass to circulate in a small circle
that lies in a plane coincident with (or parallel to) the
axis of rotation of the shafts and simultaneously circulate
in a larger circle that lies in a plane at right angles to
said axis, which circulation of the mass causes rotation of
the second shaft as the vanes carried thereby are moved by
the fluid.
(2) Note. The device termed herein "Vortex-Flow Drive", is
known in the art by such names as "fluid drive", "fluid
coupling", "fluid flywheel", "torque converter", and
"hydrokinetic torque transformer", among others. Such devices
generally fall into one of two categories. In one of these
(e.g, "fluid coupling") the angular velocity of the driven
shroud element referred to in (1) Note cannot be greater than
that of the driving element (and is usually less due to
slippage); thus the torque is not increased. In the other
category (e.g., "torque converter") an additional,
radially-vaned element is interposed in the flow of fluid to
modify direction of movement and velocity in the fluid and
thereby change the torque transmitted from the first shaft to
the second shaft.
(3) Note. A combination of vortex-flow drive and clutch
which, per se, is classified in this subclasses (3.21+) is
properly classified in Class 74 or Class 475 if gearing is
also recited in the claims.
SEE OR SEARCH THIS CLASS, SUBCLASS:
57 for an assemblage of mechanical and fluent material
clutches.
SEE OR SEARCH CLASS:
60, Power Plants, 330 for a "vortex-flow drive" device, per
se.
74, Machine Element or Mechanism, subclass 730 for the
combination of vortex-flow drive and gearing; and see (3)
Note above.
475, Planetary Gear Transmission Systems or Components, 31,
for fluid drive and control in planetary gear transmission;
and see (3) Note above.
Subclass:
3.22
This subclass is indented under subclass 3.21. Device
including a rotated input shaft that drives the combination
(i.e., the vortex-flow drive plus the clutch), and a
rotatable output shaft which may be driven by said
combination in a first direction of rotation, and provided
with means to change the direction of rotation of said output
shaft while the input shaft continues to rotate in its
original direction.
(1) Note. The shafts referred to in the definition above are
not necessarily those referred to in the definition of
"Vortex-Flow Drive", as found in (1) Note to the definition
of subclass 3.21. If, in a particular disclosure, a shaft
serves both as an "input" or "output" shaft as defined in
this subclass (3.22) and as a shaft defined in subclass 3.21,
such occurrence is coincident rather than significant.
(2) Note. The "means" referred to above may comprise a
second clutch, or a brake, or structure to reverse the flow
of fluid within the vortex-flow drive.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, 730.1 for torque reversal
means inherent in a combination of fluid drive and gearing.
475, Planetary Gear Transmission Systems or Components, 31,
for fluid drive and control in planetary gear transmission.
Subclass:
3.23
This subclass is indented under subclass 3.21. Device
further provided with a brake.
(1) Note. The term "brake" is intended to refer to that
device classified, per se, in Class 188, Brakes. This
subclass and this note are not intended to change the line
between Class 188 and Class 192 involving Brakes and
Clutches.
(2) Note. For a line between Classes 188 and 192 with
respect to a patent to a vortex-flow drive plus a brake,
without a clutch, see (2) Note to subclass 3.34 below.
Subclass:
3.24
This subclass is indented under subclass 3.23. Device
wherein either the clutch or the brake (but not both
simultaneously) is in functioning relationship.
(1) Note. For the purposes of this subclass (3.24) a clutch
is "functioning" when it is effective to transmit force, and
a brake is "functioning" when it is effective to retard
motion.
Subclass:
3.25
This subclass is indented under subclass 3.21. Device
including at least two "Vortex-Flow Drives", or at least two
clutches.
Subclass:
3.26
This subclass is indented under subclass 3.25. Device
including at least two clutches that are in
force-transmitting, relationship at the same time.
Subclass:
3.27
This subclass is indented under subclass 3.25. Device
including two clutches wherein either a first or a second of
the clutches (but not both simultaneously) is in
force-transmitting relationship.
(1) Note. The patents in this subclass usually disclose only
two clutches in combination with a vortex-flow drive. A
patent claiming a vortex-flow drive and only two clutches
that are alternatively operable is proper as an original
patent for this subclass even though it may disclose more
than two clutches.
Subclass:
3.28
This subclass is indented under subclass 3.21. Device
wherein engagement of the clutch causes the first, rotating
shaft and the second, rotated shaft of the vortex-flow drive
to be effectively secured together so that all rotation of
the first shaft is transmitted to the second shaft in 1:1
ratio.
Subclass:
3.29
This subclass is indented under subclass 3.28. Device
provided with means for causing engagement and disengagement
of the drive-lockup clutch, which means is actuated by force
applied via a liquid or gaseous medium.
(1) Note. The fluid pressure that actuates the
clutch-operator means may be derived from the toroidal flow
of the vortex-flow drive or may be derived from a secondary
source of fluid pressure as in subclass 3.3 hereunder.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3.33 for a fluid-pressure operator to engage a clutch other
than a drive-lockup clutch) that is combined with a
vortex-flow drive.
85 for a fluid-pressure operator to actuate a clutch, in
general.
Subclass:
3.3
This subclass is indented under subclass 3.29. Combination
provided with means, other than the vortex-flow drive, that
generates the force in the medium.
Subclass:
3.31
This subclass is indented under subclass 3.28. Device
provided with means for causing engagement and disengagement
of the clutch and wherein the means is actuated upon the
attainment of a predetermined angular velocity of one of the
shafts of the vortex-flow drive.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3.33 for a fluid-pressure operator which may be inherently
speed-responsive, and see (1) Note there.
87.12 for a speed-responsive fluid-pressure operator in a
device having multiple clutches.
Subclass:
3.32
This subclass is indented under subclass 3.21. Device
wherein either the vortex-flow drive or the clutch (but not
both simultaneously is in force-transmitting relationship.
Subclass:
3.33
This subclass is indented under subclass 3.21. Device
provided with means for causing engagement of the clutch,
which means is actuated by force applied via a liquid or
gaseous medium.
(1) Note. Many of the patents in this subclass (3.33)
disclose the fluid pressure for actuating the clutch to be
derived from the toroidal flow of the vortex-flow drive. It
is inherent in such disclosures that the clutch engagement is
speed responsive.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3.29 for a fluid-pressure operator to actuate a vortex-flow
drive-lockup clutch.
Subclass:
3.34
This subclass is indented under subclass 3.21. Apparatus
under the class definition in which the mechanism for control
of power includes a brake and a device described in (1) Note
of ... of this class (192).
(1) Note. The term "brake" is intended to refer to that
device classified, per se, in Class 188, Brakes. This
subclass and this note are not intended to change the line
between Class 188 and Class 192 involving brakes and
clutches, in general. It should be further noted that Class
188 (particularly subclass 296) is the locus of patents to a
"fluid brake", wherein the structure is superficially similar
to a vortex-flow drive as described in (1) Note of subclass
3.21 above. However, in the disclosures found in Class 188
subclass 296, one of the elements is fixed to its supporting
structure to retard rotation of the other element.
(2) Note. The line between this class (192) and Class 60,
Power Plants is not intended to be changed as a result of the
establishment of this subclass (3.34). This subclass (3.34)
is intended as the locus of patents to a vortex-flow drive
plus a brake applied to either the first or second shaft of
such drive (as described in (1) Note of subclass 3.21). Class
60 particularly subclasses 330+ is intended as the locus of
patents to a device similar to that described in that (1)
Note, wherein a brake is applied to the additional,
interposed element described in that (1) Note. (The
interposed element is known in the art as a "reactor
member").
SEE OR SEARCH CLASS:
60, Power Plants, 330 ; and see (2) Note, above.
188, Brakes, subclass 296 ; and see (1) Note, above.
Subclass:
3.51
This subclass is indented under the class definition. Device
including means to determine the operational mode of a clutch
structure and including means to determine the ratio of a
multi-ratio motion transmitting mechanism.
Subclass:
3.52
This subclass is indented under subclass 3.51. Device
wherein the multi-ratio motion transmitting mechanism
controlled is of the type wherein an element called a planet
member rotates about an axis, which axis revolves about a
second axis, in which the rotation and the revolution may or
not be simultaneous; and wherein the clutch structure
controlled is functional to transmit motion directly and
by-pass the multi-ratio motion transmitting mechanisms.
Subclass:
3.53
This subclass is indented under subclass 3.52. Device
including means adapted to be engaged by the foot of an
operative to determine the output of the transmission to
rotate oppositely to the input.
Subclass:
3.54
This subclass is indented under subclass 3.51. Device
wherein the means used to determine the operational mode of
the clutch is also used to determine the ratio of the
transmission.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3.63 for structure including a clutch control and a
transmission control interrelated so that one must be in a
prescribed position before the other will function.
Subclass:
3.55
This subclass is indented under subclass 3.54. Device
wherein a clutch member is moved relative to a cooperating
member into or out of motion transmitting engagement
therewith by energy originating at a source other than an
operative.
Subclass:
3.56
This subclass is indented under subclass 3.55. Device
wherein the clutch member is moved relative to the
cooperating member by the attracting force of an electrically
induced magnetic field in one member acting on ferrous-like
material in the other member (or on structure connected to
the members).
Subclass:
3.57
This subclass is indented under subclass 3.55. Device
wherein the clutch member is moved relative to the
cooperating member by the action of a pressurized flowable
medium acting on one of the members (or on structure
connected thereto).
Subclass:
3.58
Device under 3.57 including structure for conducting
electrical current which is regulated responsive to the
mode/ratio determining means to, in turn, regulate the flow
of the clutch operating medium.
Subclass:
3.59
This subclass is indented under subclass 3.57. Device
including provision to reduce the pressure on a portion of
one of the members (or structure connected thereto) so that
atmospheric pressure serves to moves that member relatively
to the other member.
Subclass:
3.61
This subclass is indented under subclass 3.54. Device
wherein the multi-ratio motion transmitting mechanism is of a
type capable of operation in a limited number of specific,
exactly proportional relationships.
Subclass:
3.62
This subclass is indented under subclass 3.61. Device
wherein the common control includes means adapted to be
gripped by the hand of an operator.
Subclass:
3.63
This subclass is indented under subclass 3.51. Device
wherein the operation of one of the control means is
dependent on the operational characteristics of the other
control means.
Subclass:
12
This subclass is indented under the class definition.
Mechanism in which a clutch or brake is applied alternately
to drive and retard or stop the mechanism.
SEE OR SEARCH THIS CLASS, SUBCLASS:
223.1 through 223.4, where the brake is applied
automati-cally on the breaking of a belt.
SEE OR SEARCH CLASS:
188, Brakes, subclass 291 for a fluid-resistance brake
having a clutch between the brake and a rotating load to
connect and disconnect the brake from the load.
254, Implements or Apparatus for Applying Pushing or Pulling
Force, subclass 300, 318, 347, and 366 for apparatus for
hauling or hoisting a load, including at least one
cable-pulling drum which is driven around its rotational axis
by a drive having a clutch mechanism with coaxial, rotatable,
relatively shiftable axially, power-transmitting components;
the clutch mechanism is linked to and is operationally
influenced by a frictional brake assembly which retards the
rotation of the drum.
Subclass:
13
This subclass is indented under subclass 12. Combinations of
clutch and brake adapted for use in propelling and retarding
vehicles.
Subclass:
14
This subclass is indented under subclass 12. Combinations in
which the clutch and brake are the same member.
SEE OR SEARCH THIS CLASS, SUBCLASS:
16 for brakes which are automatically applied when drive
through the clutch ceases.
Subclass:
15
This subclass is indented under subclass 12. Combinations in
which the brake is applied automatically when drive through
the clutch ceases.
Subclass:
16
This subclass is indented under subclass 15. Combinations in
which the clutch and brake are the same member.
Subclass:
17
This subclass is indented under subclass 12. Combinations in
which the brake is applied transversely to the periphery of a
wheel.
Subclass:
18
This subclass is indented under subclass 12. Combinations in
which both the clutch and brake move parallel to the axis of
motion.
Subclass:
19
This subclass is indented under subclass 12. Combinations in
which the clutch and brake are operated by the crank that
drives the shaft.
SEE OR SEARCH THIS CLASS, SUBCLASS:
100 for follow up type clutch operators.
Subclass:
20
This subclass is indented under the class definition.
Clutches in which the clutch is associated with a gear that
is instrumental simply in completing the operation of the
clutch.
Subclass:
21
This subclass is indented under subclass 20. Clutches in
which the gearing completes the reversal of the clutch.
Subclass:
21.5
This subclass is indented under the class definition.
Devices wherein torque is transmitted or absorbed between two
relatively movable members having a medium there between and
wherein the frictional characteristics of the medium are (1)
augmented by, or (2) altered in response to a change in, a
magnetic or an electrostatic field set up between the two
members.
SEE OR SEARCH THIS CLASS, SUBCLASS:
84.1 for other types of electrically actuated clutches.
SEE OR SEARCH CLASS:
310, Electrical Generator or Motor Structure, 92 for
electrodynamic torque transmitting clutches or brakes.
Subclass:
22
This subclass is indented under the class definition.
Clutches in which the operation of a clutching or
transmission member is accomplished through a latch or
relatively stationary finger.
Subclass:
23
This subclass is indented under subclass 22. Clutches
peculiarly adapted to seed-planters.
Subclass:
24
This subclass is indented under subclass 22. Clutches in
which a clutching member moves parallel to the axis of
rotation.
Subclass:
25
This subclass is indented under subclass 24. Mechanism in
which the clutching member is a pin.
SEE OR SEARCH CLASS:
26, Textiles: Cloth Finishing, subclass 24 for clutches
associated with cloth pulling machines.
Subclass:
26
This subclass is indented under subclass 22. Clutches in
which the clutching member moves transversely to the axis of
rotation.
Subclass:
27
This subclass is indented under subclass 26. Clutches in
which the active element of the latch-operated mechanism is a
ball or roller.
SEE OR SEARCH THIS CLASS, SUBCLASS:
45 for ball and roller one-way engaging automatic clutches
and see the notes thereto for other ball and roller
clutches.
Subclass:
28
This subclass is indented under subclass 26. Clutches in
which the transversely-moving clutching member engages
positively.
Subclass:
29
This subclass is indented under subclass 28. Clutches in
which the positive clutching member is a rotary approximately
cylindrical member.
Subclass:
30
This subclass is indented under the class definition.
Power-transmitting devices operating by friction or by
interlocking for securing driving continuity as between two
shafts or a pulley and a shaft or other driving and driven
parts.
(1) Note. Class 464, in subclasses 30+, has overload release
couplings wherein relative rotation between coupled members
continues so long as an overload condition occurs. The line
between Class 464, subclasses 30+, and Class 192, subclasses
56.1+, is that Class 464 takes structure wherein relatively
rotatable surfaces move with respect to each other during an
overload condition; but drive through such surfaces is
automatically reestablished, without an additional operation,
upon correction of the overload condition. Class 192,
subclasses 56.1+, requires a further operation, in addition
to correcting the overload condition, to reestablish the
drive; such further operation being, for example, operator
assisted reengagement or reduction in rotational speed of a
power input member.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3.21 for a vortex-flow drive and clutch, and especially
subclasses 3.28+ for a drive-lockup clutch.
SEE OR SEARCH CLASS:
91, Motors: Expansible Chamber Type, subclass 55 for a
significantly claimed expansible chamber motor combined with
a clutch in the output therefrom and not involving an
interrelated control of the motor and clutch.
166, Wells, 237 for well devices with clutches.
464, Rotary Shafts, Gudgeons, Housings, and Flexible
Couplings for Rotary Shafts, 30 for overload release
coupling devices in accordance with the aforementioned line
note.
Subclass:
31
This subclass is indented under subclass 30. Clutches which
engage without manipulation upon the initiation of rotation
of the parts to which they are attached.
SEE OR SEARCH CLASS:
180, Motor Vehicles, 14.1 for clutch operations due to
unusual motions of automobile tractors.
Subclass:
32
This subclass is indented under subclass 31. Clutches the
action of which is initiated by manipulation, upon which the
engagement is completed automatically.
SEE OR SEARCH THIS CLASS, SUBCLASS:
47 for one-way engaging automatic clutches that may be made
operative or inoperative by manipulation.
SEE OR SEARCH CLASS:
188, Brakes, 82.3 for one-way brakes which include means
whereby the brake may be rendered inoperative to prevent
retrograde motion of a rotating element.
Subclass:
33
This subclass is indented under subclass 32. Clutches in
which the clutch is disengaged at the end of a cycle.
Subclass:
34
This subclass is indented under subclass 32. Clutches in
which the action of engagement is completed by the thrust of
the shaft.
Subclass:
35
This subclass is indented under subclass 32. Clutches in
which the initial action is to throw in a pilot-clutch or
other pilot mechanism, which operates to effect the
engagement of the main clutch.
Subclass:
36
This subclass is indented under subclass 35. Clutches in
which the pilot mechanism is of a brake-band type.
Subclass:
37
This subclass is indented under subclass 32. Clutches in
which the clutching parts move transversely to the axis of
rotation.
Subclass:
38
This subclass is indented under subclass 37. Clutches in
which the transversely-moving clutching part is a ball or
roller.
SEE OR SEARCH THIS CLASS, SUBCLASS:
45 for one-way engaging automatic clutches in which the
engaging element is a ball or roller and see the notes
thereto for other ball or roller clutches.
Subclass:
39
This subclass is indented under subclass 37. Clutches in
which the transversely-moving clutching parts are positively
engaged.
Subclass:
40
This subclass is indented under subclass 32. Clutches in
which the automatic action of the clutch is controlled
electrically.
Subclass:
41
This subclass is indented under subclass 31. Clutches which
engage in one direction of rotation without manipulation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
48.6 and 48.92, for plural clutch-assemblages including a
one-way engaging clutch.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, 111 for mechanical
movements, intermittent grip type, especially subclasses
144+, for lever mounted grip units, and see (1) Note to the
definition of Class 74, and subclass 144 for the line between
these two subclasses.
123, Internal-Combustion Engines, 185.1 for internal
combustion engine cranking mechanisms.
188, Brakes, 82.1, for brakes applied to elements rotating
relative to stationary elements to prevent retrograde
rotation while allowing forward rotation.
Subclass:
42
This subclass is indented under subclass 41. Clutches
designed to impart initial movement to an engine to start the
same, the clutch releasing when the speed of the engine
exceeds the starting-speed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
63 for manually-controlled clutches of this type.
Subclass:
43
This subclass is indented under subclass 41. Clutches
adjustable to drive in either direction.
SEE OR SEARCH CLASS:
188, Brakes, subclass 82.2 for one-way brakes in which the
direction in which retrograde rotation is prevented is
selectable.
Subclass:
43.1
This subclass is indented under subclass 43. Clutches in
which the engaging elements are pivoted pawls, each set of
pawls comprising a pair of oppositely-directed pivoted pawls,
which may be an integral single member.
SEE OR SEARCH CLASS:
81, Tools, 29 for ratchet type bit stocks.
188, Brakes, 82.7 for one-way brakes in which there is a
pivoting or flexing detent.
Subclass:
43.2
This subclass is indented under subclass 43. Clutches in
which the engaging elements are slidable pawls.
SEE OR SEARCH CLASS:
81, Tools, 29, for ratchet type bit stocks.
Subclass:
44
This subclass is indented under subclass 43. Clutches in
which the engaging elements are balls or rollers.
SEE OR SEARCH THIS CLASS, SUBCLASS:
45 for ball or roller one-way engaging clutches and see the
notes thereto for other clutches with a ball or roller
engaging element.
Subclass:
45
This subclass is indented under subclass 41. Clutches in
which the engaging element is a ball or roller.
SEE OR SEARCH THIS CLASS, SUBCLASS:
27 for latch operated clutches in which the transmitting
member is a ball or roller.
38 for one-way automatic manually controlled clutches in
which the clutching element is a ball or roller.
44 for one-way clutches in which the clutching element is a
ball or roller.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, 162 for intermittent grip
devices.
188, Brakes, subclass 82.84, for one-way brakes in which the
engaging element rolls into jamming position between
converging surfaces one of which is the rotating element to
exert a braking force.
Subclass:
45.1
This subclass is indented under subclass 41. Clutches in
which the engaging element is a wedging pawl or block.
SEE OR SEARCH CLASS:
188, Brakes, 82.7 for one-way brakes employing a pivoting or
flexing detent, and subclasses 82.8+ for one-way brakes in
which retrograde rotation of a rotating element forces a
member in jamming position between converging surfaces one of
which is the rotating element to cause a braking.
Subclass:
45.2
This subclass is indented under subclass 41. Clutches in
which the engaging element has a two-point frictional
gripping contact.
Subclass:
46
This subclass is indented under subclass 41. Clutches which
positively engage.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, 111 for mechanical
movements, intermittent grip type.
Subclass:
47
This subclass is indented under subclass 41. Clutches that
may be made operative or inoperative by manipulation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
32 for automatic clutches in which the action is initiated
by manipulation upon which the engagement is completed
automatically.
SEE OR SEARCH CLASS:
188, Brakes, subclass 82.3 for one-way brakes with means by
which it may be rendered inoperative to prevent retrograde
motion of rotating element.
Subclass:
48.1
This subclass is indented under subclass 31. Mechanism
provided with at least two clutch-assemblages associated
together to transmit rotation from at least one rotating
input shaft to at least one rotatable output shaft.
(1) Note. A clutch-assemblage comprises all the parts that
cooperate together to (a) connect a rotating "input" shaft
(or a pulley, drum, flywheel, gear or other equivalent
torque-transmitting member) to a rotatable "output" shaft (or
hub, pulley, gear or other equivalent torque-transmitting
member) that is coaxial with and driven by the input shaft,
or (b) disconnect said shafts from rotational relationship,
either action being performed at the will of the user of the
clutch-assemblage. Although any clutch-assemblage is by
itself a distinct entity and is capable of transmitting
rotation from an input shaft to an output shaft, different
clutch-assemblages may have parts in common. That is, a part
may form one of the components of a first clutch-assemblage
at one time, and that part may also form one of the
components of a second clutch-assemblage at another time. An
example of a use for such an arrangement is a machine having
an input shaft that may be clutched selectively to any of a
plurality of output shafts by using a shiftable
clutch-element first in one clutch-assemblage and then in
another clutch-assemblage. See subclass 48.91 for such an
arrangement. Another common arrangement is a first
clutch-assemblage having an output shaft that is also the
input shaft of a second clutch-assemblage in "series"
relationship.
(2) Note. The term "clutch-element" as used in this and
indented subclasses has the same meaning as the term defined
and described in the definition and notes of subclass 70.11
below. However, whereas in subclass 70.11 the engaging
surface is usually a friction surface, in this subclasses
(48.1+) it may be a friction surface or a toothed or
gear-like surface or any other surface configuration that
will mate with another, complementary surface on a second
clutch-element to transmit rotation between the elements
having such surfaces.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3.26 for a combination including a vortex-flow drive and a
plurality of clutches.
35 for a multiple-clutch arrangement in which one clutch
serves as a pilot operator for the other.
57 for a combination of fluent-material clutch and
mechanical clutch.
87.1 for a multiple-clutch arrangement wherein the clutches
are actuated by fluid-pressure operators.
Subclass:
48.2
This subclass is indented under subclass 48.1. Device
wherein one of the associated clutch-assemblages is provided
with clutch-elements that are mutually engaged or disengaged
by electromagnetic energy.
(1) Note. Included in the subclass are plural
clutch-assemblages of which at least one is actuated by eddy
currents, or by a field-responsive frictional medium, (per
se, classified in subclass 21.5) or by an electrical
operator, (per se, classified in subclasses 84.1+).
SEE OR SEARCH THIS CLASS, SUBCLASS:
21.5 and 84.1+, and see (1) Note above.
SEE OR SEARCH CLASS:
310, Electrical Generator or Motor Structure, 92, for an eddy
current clutch associated with other structure provided for
in that schedule.
Subclass:
48.3
This subclass is indented under subclass 48.1. Device
wherein one of the associated clutch-assemblages is different
in its principle of operation from another.
(1) Note. Examples of arrangements wherein the principle of
operation is "different" include: Arrangements wherein one
clutch-assemblage is actuated by fluid pressure whereas
another clutch-assemblage is actuated by mechanical linkage;
arrangements wherein one clutch-assemblage uses
clutch-elements that engage positively, as by splines,
intermeshing teeth or ratchet-and-pawl elements, whereas
another clutch-assemblage uses clutch-elements that engage
frictionally, as by surface-to-surface contact; and
arrangements wherein one clutch-assemblage is intended to
function in only one direction of rotation whereas another
clutch-assemblage is intended to transmit all torque applied
thereto in either direction of rotation. Minor differences in
shape or size between the elements of clutch-assemblages, not
involving differences in operation, are not justification for
placement into this and indented subclasses. For example, an
arrangement of clutch-assemblages wherein one has tapered
clutch-elements and another has disc clutch-elements or an
arrangement of clutch-assemblages wherein one uses rollers
and another uses balls, are not properly considered to be
"diverse", but will be classified in subclasses 48.11+
according to their plural characteristics.
Subclass:
48.4
This subclass is indented under subclass 48.3. Device
provided with more than two associated clutch-assemblages.
Subclass:
48.5
This subclass is indented under subclass 48.3. Device
wherein one of the associated clutch-assemblages is provided
with a clutch-element that intermeshes with a mating
clutch-element to transmit torque positively (i.e., without
slipping), in at least one direction of rotation, from an
input shaft to an output shaft.
(1) Note. The clutch-assemblage defined above is also known
as a "positive" clutch. The other clutch-assemblage
associated therewith in this subclass (48.5) usually has
friction clutch-elements.
SEE OR SEARCH THIS CLASS, SUBCLASS:
28 39, 46, 69+, and 71 and for a clutch, per se, of
"positive" type.
Subclass:
48.6
This subclass is indented under subclass 48.5. Device
wherein a second one of the associated clutch-assemblages is
provided with clutch-elements that transmit torque from an
input shaft to an output shaft in only one direction of
rotation of the input shaft, which clutch-elements permit
rotation in said direction of the output shaft relative to
the input shaft.
(1) Note. The clutch-assemblage herein is also known by the
terms "Overrunning clutch", "One-way clutch" and
"Free-wheeling clutch". The purpose of such arrangement is to
cause engagement of the clutch-elements when the input shaft
is powered whereby the output shaft will rotate at least as
fast as the input shaft, but to permit the output shaft to
rotate faster than the input shaft under certain conditions
of operation.
(2) Note. This subclass provides for two or more
clutch-assemblages, one of which has positively-engaging
clutch-elements and another of which has one-way-engaging
clutch-elements.
SEE OR SEARCH THIS CLASS, SUBCLASS:
41 for a one-way-engaging clutch.
48.92 for plurality of one-way-engaging clutch-assemblages.
Subclass:
48.7
This subclass is indented under subclass 48.1. Device
wherein two or more clutch-assemblages are intended to be
operative simultaneously as a set, provided with means to
ensure that one clutch-assemblage of said set has its
clutch-elements fully engaged before another
clutch-assemblage of said set has its clutch-elements
engaged, or with means to ensure that one clutch-assemblage
of said set has its clutch-elements fully disengaged before
another clutch-assemblage of said set has its clutch-elements
disengaged.
(1) Note. The set of clutch-assemblages described above
permits torque from an input shaft to be applied to an output
shaft in stages, or progressively, in order to reduce stress
or shock attendant upon a sudden application of load.
SEE OR SEARCH THIS CLASS, SUBCLASS:
52.1 and 70.21, for other arrangements for progressively
transmitting load from an input to an output shaft.
Subclass:
48.8
This subclass is indented under subclass 48.1. Device
wherein the clutch-assemblages are provided with more than
two shafts for input or output of torque, in any combination
of one (or more) input shaft (s) plus two (or more) output
shafts, or of two (or more) output shafts plus one (or more)
output shaft (s).
(1) Note. For the purposes of this and indented subclasses,
a shaft is a rotating member that transmits torque; thus a
gear, pulley, drum, hub, etc., is equivalent to a shaft. An
input shaft is such a member that is rotated by a source of
power external to the device, and an output shaft is such a
member that (a) is rotated by the claimed device AND (b)
rotates a torque-using mechanism external to the claimed
device. Thus, if there are rotating members that transmit
torque between the input and output shafts within the device
they are not counted in the number "three or more" required
for these subclasses.
Subclass:
48.9
This subclass is indented under subclass 48.8. Device
wherein either a first or a second of the clutch-assemblages
(but not both simultaneously) is in torque-transmitting
relationship.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3.27 for the combination of a vortex-flow drive and
alternatively operative clutches.
87.14 for alternatively operative clutches that are actuated
by fluid-pressure operator means.
Subclass:
48.91
This subclass is indented under subclass 48.9. Device
wherein a member rigidly carries one of the clutch-elements
of the first clutch-assemblage and the same member rigidly
carries one of the clutch-elements of the second
clutch-assemblage.
Subclass:
48.92
This subclass is indented under subclass 48.1. Device
wherein at least one of the associated clutch-assemblages is
provided with clutch-elements that transmit torque from an
input shaft to an output shaft in only one direction of
rotation of the input shaft, which clutch-elements permit
rotation in said direction of the output shaft relative to
the input shaft.
SEE OR SEARCH THIS CLASS, SUBCLASS:
41 for a one-way-engaging clutch.
48.6 for an arrangement of a one-way-engaging
clutch-assemblage and a "positive" clutch-assemblage.
Subclass:
49
This subclass is indented under subclass 48.1. Clutches
associated to operate in connection with parallel
vehicle-wheels.
SEE OR SEARCH CLASS:
280, Land Vehicles, subclass 192, for clutches driven by
vehicle wheels and driving a winding drum used in controlling
the vehicle.
Subclass:
50
This subclass is indented under subclass 49. Clutches
associated to operate in connection with parallel
vehicle-wheels, permitting either wheel to overrun.
Subclass:
51
This subclass is indented under subclass 48.1. Clutches
instrumental in accomplishing the reversal of rotation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
21 for clutches associated with gearing to accomplish a
reversal in rotation.
Subclass:
52.1
Progressive engagement:
This subclass is indented under subclass 30. Subject matter
wherein means are provided specifically to cause clutch
elements to engage gradually.
SEE OR SEARCH THIS CLASS, SUBCLASS:
48.7 for an arrangement of two or more clutch-assemblages
that engage (or disengage) progressively or in succession,
thus transmitting (or releasing) torque progressively from an
input shaft to an output shaft.
70.21 for a multiple-element clutch wherein the elements
engage (or disengage) sequentially.
Subclass:
52.2
Surface area:
This subclass is indented under subclass 52.1. Subject
matter wherein the amount of surface area of one clutch
element in engagement with a second clutch element increases
as the elements move toward full engagement.
Subclass:
52.3
Yielding:
This subclass is indented under subclass 52.2. Subject
matter wherein at least one clutch element deforms as a
result of engagement to cause an increase in the engaging
surface area.
Subclass:
52.4
Variable force:
This subclass is indented under subclass 52.1. Subject
matter wherein an engaging force is changed during clutch
engagement in order to provide gradual engagement of the
clutch.
Subclass:
52.5
Initial engagement causes increase in applied force:
This subclass is indented under subclass 52.4. Subject
matter wherein initial clutch engagement causes relative
rotation of a mechanism to increase the applied force.
Subclass:
52.6
Yielding:
This subclass is indented under subclass 52.1. Subject
matter wherein at least one clutch element deforms as a
result of engagement to cause gradual engagement while the
contacting surface area remains constant.
SEE OR SEARCH THIS CLASS, SUBCLASS:
107 for a subcombination of a clutch which is axially
compressible.
Subclass:
53.1
Frictional and positive:
This subclass is indented under subclass 52.1. Subject
matter wherein after a preliminary slipping engagement of
friction elements, positive clutch elements intermesh to
transmit torque without slip.
SEE OR SEARCH CLASS:
188, Brakes, subclass 68, for similar action in brakes.
Subclass:
53.2
Magnetic or electromagnetic operated friction clutch:
This subclass is indented under subclass 53.1. Subject
matter wherein the slipping engagement is produced by the
force of a magnet or electromagnet.
SEE OR SEARCH THIS CLASS, SUBCLASS:
84 for clutches engaged by electromagnetic force.
Subclass:
53.3
With blocker:
This subclass is indented under subclass 53.1. Subject
matter wherein structure is provided to resist or delay
movement of a shiftable positive clutch element into full
engagement to facilitate synchronization.
(1) Note. Clutches in subclasses 53.3+ are typically
synchronizer clutches for use in transmissions to facilitate
shifting from one gear ratio to another, and classification
in these subclasses is proper even if one clutch element is
claimed as a gear.
(2) Note.Where parallel transmission shafts and cooperating
gears are claimed, classification in Class 74, subclasses
325+ is proper.
Subclass:
53.31
Self-energizing:
This subclass is indented under subclass 53.3. Subject
matter wherein a cam structure is provided to increase the
clamping force of friction elements after an initial
engagement of the friction elements.
Subclass:
53.32
Interposed friction member:
This subclass is indented under subclass 53.3. Subject
matter wherein frictional engagement is provided by at least
three friction elements with at least one friction element
being sandwiched between adjacent elements.
(1) Note. The friction elements here are generally in the
form of discs or frustocones.
SEE OR SEARCH THIS CLASS, SUBCLASS:
70.11 for a multiple friction element clutch assemblage, per
se.
Subclass:
53.33
Member extending axially between friction surfaces:
This subclass is indented under subclass 53.3. Subject
matter wherein there are plural friction elements connected
to at least one axially extending member which cooperates
with a radially extending portion of a shift sleeve to
perform a blocking function.
Subclass:
53.331
Blocker on axially extending stepped pin:
This subclass is indented under subclass 53.33. Subject
matter wherein at least one axially extending member has a
substantially circular cross-section and the cross-section
has a diameter that varies along the length of the axially
extending member.
Subclass:
53.332
Resilient detent pin:
This subclass is indented under subclass 53.331. Subject
matter further including at least one axially extending
resilient member offset circumferentially from the stepped
pin to cooperate with an opening in the shift sleeve to
define at least one position of the shift sleeve.
(1) Note. These members are typically themselves yieldable
or are made up of separate sections biased apart by a
distinct resilient element.
Subclass:
53.34
Outward tooth or lug on friction member:
This subclass is indented under subclass 53.3. Subject
matter wherein the blocker includes at least one lug or tooth
carried by a friction element in which said lug or tooth
projects radially outward of the rotational axis.
Subclass:
53.341
With thrust member:
This subclass is indented under subclass 53.34. Subject
matter wherein the shiftable positive clutch element carries
a keylike strut member for imparting axial force to the
friction element.
Subclass:
53.342
Resilient thrust bar:
This subclass is indented under subclass 53.341. Subject
matter wherein the keylike strut member is made of a
yieldable material.
Subclass:
53.343
Resilient expander ring:
This subclass is indented under subclass 53.341. Subject
matter wherein the keylike strut member is biased radially
outward relative to the rotation axis by at least one
substantially circular spring ring.
Subclass:
53.35
Inward tooth or lug on friction member:
This subclass is indented under subclass 53.3. Subject
matter wherein the blocker includes at least one lug or tooth
carried by the friction element in which said lug or tooth
projects radially toward the rotational axis.
Subclass:
53.36
Radially movable blocker:
This subclass is indented under subclass 53.3. Subject
matter wherein the blocker has a component of movement which
is transverse or oblique to the axis of rotation to allow the
shiftable positive clutch element to pass into its engaged
position.
Subclass:
53.361
Detent acts as blocker:
This subclass is indented under subclass 53.3. Subject
matter wherein the radially movable blocker comprises
structure which is provided to define a disengaged position
of the shiftable positive clutch element.
Subclass:
53.362
Rocker lever actuates friction clutch:
This subclass is indented under subclass 53.361. Subject
matter wherein the detent is formed by or carried by a
generally radially disposed pin which is pivotally mounted at
its radially inner end to an input or output shaft and is
releasably connected at its radially outer end to the
shiftable positive clutch element; and wherein axial movement
of the shiftable element causes the pin to tilt and force
frictional surfaces into engagement; further shifting of the
element, and engagement of the positive clutch elements,
being resisted by the releasable connection until
synchronization is achieved.
Subclass:
53.363
Radially movable friction element acts as blocker:
This subclass is indented under subclass 53.36. Subject
matter wherein one of the friction elements has a component
of movement transverse to the axis of rotation to allow the
shiftable positive clutch element to pass into its engaged
position.
Subclass:
53.364
Resilient friction element:
This subclass is indented under subclass 53.363. Subject
matter wherein the transversely moving friction element is
formed by a resilient ringlike member substantially
concentric to the clutch rotational axis.
Subclass:
53.4
Lock for positive clutch:
This subclass is indented under subclass 53.1. Subject
matter wherein structure is provided to prevent inadvertent
disengagement of the intermeshed positive elements.
(1) Note. The structure here can be the configuration of the
positive clutch teeth or a separate device to maintain the
positive clutch in engagement.
SEE OR SEARCH THIS CLASS, SUBCLASS:
114 for element-locking means, per se.
Subclass:
53.5
Axially projecting positive clutch:
This subclass is indented under subclass 53.1. Subject
matter wherein at least one of the positive clutch elements
includes at least one tooth or lug projecting axially from an
end face thereof.
(1) Note. Devices in this subclass do not include a
blocker.
SEE OR SEARCH THIS CLASS, SUBCLASS:
69 for axially engaging positive clutches, per se.
Subclass:
53.51
Cylindrical pin:
This subclass is indented under subclass 53.5. Subject
matter wherein the tooth or lug has a substantially circular
cross-sectional shape.
Subclass:
53.6
Transversely moving positive clutch:
This subclass is indented under subclass 53.1. Subject
matter wherein at least one of the positive clutch elements
has a component of engaging movement transverse to the axis
of rotation.
(1) Note. Devices in this subclass do not include a
blocker.
SEE OR SEARCH THIS CLASS, SUBCLASS:
71 for transversely engaging clutches, per se.
Subclass:
54.1
Torque responsive:
This subclass is indented under subclass 30. Subject matter
wherein the transmission of torque from a clutch input shaft
to a clutch output shaft is affected by the torsional strain
on one of the shafts.
(1) Note.Class 464, in subclasses 30+, has overload release
couplings wherein relative rotation between coupled members
continues so long as an overload condition occurs. The line
between Class 464, subclasses 30+, and Class 192, subclasses
56.1+, is that Class 464 takes structure wherein relatively
rotatable surfaces move with respect to each other during an
overload condition; but drive through such surfaces is
automatically reestablished, without an additional operation,
upon correction of the overload condition. Class 192,
subclasses 56.1+, requires a further operation, in addition
to correcting the overload condition, to reestablish the
drive; such further operation being, for example, operator
assisted reengagement or reduction in rotational speed of a
power input member.
Subclass:
54.2
Hub clutch:
This subclass is indented under subclass 54.1. Subject
matter wherein the clutch engages a wheel hub to a
selectively driven axle (e.g., in a four-wheel drive
vehicle).
SEE OR SEARCH THIS CLASS, SUBCLASS:
69.4 for positive engaging wheel hub clutches, perse.
Subclass:
54.3
Fluid operated:
This subclass is indented under subclass 54.1. Subject
matter wherein the clutch is moved either to an engaged or
disengaged position by hydraulic or pneumatic pressure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
85 for fluid pressure operators, per se.
Subclass:
54.4
Magnetic or electromagnetic:
This subclass is indented under subclass 54.1. Subject
matter wherein the clutch is moved either to an engaged or
disengaged position by a permanent magnet or an
electromagnetic coil.
SEE OR SEARCH THIS CLASS, SUBCLASS:
84 for a magnetic or electromagnetic operator, per se.
Subclass:
54.5
Cam operated:
This subclass is indented under subclass 54.1. Subject
matter wherein the torsional strain causes movement of an
inclined surface relative to a cooperating structure to
affect engagement of the clutch.
SEE OR SEARCH THIS CLASS, SUBCLASS:
93 for a cam operator, per se.
Subclass:
54.51
Screw operated:
This subclass is indented under subclass 54.5. Subject
matter wherein the torsional strain causes movement of a
helical thread spline relative to a cooperating structure to
affect engagement of the clutch.
Subclass:
54.52
Ball or roller type:
This subclass is indented under subclass 54.5. Subject
matter wherein the inclined surface contacts a sphere or
cylinder.
Subclass:
55.1
With overload release coupling:
This subclass is indented under subclass 54.1. Subject
matter having structure in the torque transmission path which
permits continuous relative rotation between the input and
output shafts, without disengaging the clutch upon occurrence
of a torque overload.
(1) Note. This subclass includes the combination of a
selectively engageable clutch and an overload slip coupling.
SEE OR SEARCH THIS CLASS, SUBCLASS:
52.3 and 52.6, for clutches in which one element yields as
the clutch engages to cause gradual engagement.
56.1 for clutches which disengage upon overload.
SEE OR SEARCH CLASS:
464, Rotary Shafts, Gudgeons, Housings and Flexible Couplings
for Rotary Shafts, 30, for a flexible coupling wherein means
is provided for transmitting torque between input and output
members so as to accommodate relative rotation between said
members when resistance to rotation of said output member
exceeds a predetermined value, said means including either
(a) a device which is designed to rupture when said
resistance to rotation exceeds said predetermined value, or
(b) a device which slips or disengages when said resistance
to rotation exceeds said predetermined value but which
automatically reengages without operator intervention or
other additional operation when said resistance to rotation
no longer exceeds said predetermined value.
Subclass:
55.2
With flexible shaft coupling permitting limited relative
rotation:
This subclass is indented under subclass 54.1. Subject
matter having structure in the torque transmission path which
permits limited relative rotation between the input and
output shafts in order to absorb torque variations.
(1) Note. This subclass and subclasses indented thereunder
include the combination of a selectively engageable clutch
and a flexible shaft coupling. Classification in this
subclass requires more than mere nominal recitation of a
clutch.
SEE OR SEARCH THIS CLASS, SUBCLASS:
70.17 for clutches having interposed mating clutch elements
including recoilably yieldable means permitting a limited
degree of variation between the rotation of a shaft and the
rotation of a member supported thereby.
200 for a subcombination comprising a clutch element
resiliently mounted on a hub.
SEE OR SEARCH CLASS:
464, Rotary Shafts, Gudgeons, Housings and Flexible Couplings
for Rotary Shafts, appropriate subclasses for flexible shaft
couplings, per se.
Subclass:
55.3
Separate resilient member between clutch element and its
shaft:
This subclass is indented under subclass 55.2. Subject
matter wherein the structure which permits limited relative
rotation is a coupling separate from the engaging clutch
elements and includes at least one resiliently yieldable
member.
Subclass:
55.4
Fluid damper:
This subclass is indented under subclass 55.3. Subject
matter wherein the resilience of the resiliently yieldable
member or members is provided by compressing a liquid or gas
or by forcing a liquid or gas through a restriction (e.g., a
dashpot).
Subclass:
55.5
Coil spring coaxial with rotation axis:
This subclass is indented under subclass 55.3. Subject
matter wherein at least one yieldable member is comprised of
an elongated elastic element coiled about a center line which
substantially coincides with the axis of the clutch.
Subclass:
55.51
Radially overlapping convolutions:
This subclass is indented under subclass 55.5. Subject
matter wherein the coils of the elongated element overlie
each other substantially in a plane transverse to the
rotational axis of the clutch.
Subclass:
55.6
Plural resilient members:
This subclass is indented under subclass 55.3. Subject
matter including plural resiliently yieldable members.
Subclass:
55.61
Coil springs with center line spaced from rotational axis:
This subclass is indented under subclass 55.6. Subject
matter wherein each of the resiliently yieldable members is
comprised of an elongated elastic element coiled about a
center line other than the rotational axis of the clutch.
Subclass:
55.62
Center line of coil springs parallel to rotational axis:
This subclass is indented under subclass 55.61. Subject
matter wherein each of the elongated resilient or elastic
members is coiled about a center line that is substantially
parallel to the rotational axis of the clutch.
Subclass:
55.7
Coil spring with center line spaced from rotational axis:
This subclass is indented under subclass 55.3. Subject
matter wherein there is a single resiliently yieldable member
comprised of an elongated resilient or elastic element coiled
about a center line other than the rotational axis of the
clutch.
Subclass:
56.1
Overload release:
This subclass is indented under subclass 54.1. Subject
matter wherein engaged clutch elements, coupling input and
output shafts of a selectively engageable clutch, release or
slip when subjected to an excessive torsional strain on one
of the shafts.
(1) Note. See the line note in subclass 54.1 for the line
between Class 192 and Class 464.
SEE OR SEARCH THIS CLASS, SUBCLASS:
55.1 for structure in the drive-line of the clutch which
slips on overload while the clutch remains engaged (e.g., the
combination of a clutch and overload coupling).
SEE OR SEARCH CLASS:
464, Rotary Shafts, Gudgeons, Housings, and Flexible
Couplings for Rotary Shafts, 32 for structure wherein torque
transmission is disrupted by breakage of a frangible element
that may be replaced.
Subclass:
56.2
Coil:
This subclass is indented under subclass 56.1. Subject
matter wherein one of the clutch elements is a helically
coiled resilient device which frictionally engages the other
clutch element to transmit torque.
Subclass:
56.3
Fluid operated clutch:
This subclass is indented under subclass 56.1. Subject
matter wherein the clutch elements are moved to or held in
either an engaged or released condition by means of a liquid
or gas under pressure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
85 for fluid activated clutches, per se.
Subclass:
56.31
Axially engaged:
This subclass is indented under subclass 56.3. Subject
matter wherein movement of the clutch elements to the engaged
condition is in a direction parallel to the rotation axis of
the clutch.
Subclass:
56.32
Positive:
This subclass is indented under subclass 56.31. Subject
matter wherein the clutch elements have formations thereon
which intermesh to transmit torque without slip.
Subclass:
56.33
Ball or roller:
This subclass is indented under subclass 56.32. Subject
matter wherein at least one of the formations is a spherical
or generally cylindrical member.
Subclass:
56.4
Magnetic or electromagnetic:
This subclass is indented under subclass 56.1. Subject
matter wherein the clutch elements are moved to or held in
either an engaged or released condition by means of at least
one permanent magnet or electromagnetic coil.
SEE OR SEARCH THIS CLASS, SUBCLASS:
84 for magnetically or electromagnetically operated
clutches, per se.
Subclass:
56.41
Axially engaged:
This subclass is indented under subclass 56.4. Subject
matter wherein movement of the clutch elements to the engaged
condition is in a direction parallel to the rotation axis of
the clutch.
Subclass:
56.42
Positive:
This subclass is indented under subclass 56.41. Subject
matter wherein the clutch elements have formations thereon
which intermesh to transmit torque without slip.
Subclass:
56.43
Ball or roller:
This subclass is indented under subclass 56.42. Subject
matter wherein at least one of the formations is a spherical
or generally cylindrical member.
Subclass:
56.5
Clutch elements remain disengaged after overload corrected:
This subclass is indented under subclass 56.1. Subject
matter wherein the clutch elements release from engagement
when subjected to excessive torsional strain and remain
released after the excessive torsional strain is reduced.
Subclass:
56.51
Having separate latch to hold clutch elements disengaged:
This subclass is indented under subclass 56.5. Subject
matter having a spring biased detent or pivoted pawl which
positively engages another member to prevent the clutch
elements from reengaging until reset by an operator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
114 for locking devices, per se.
150 for overload release mechanism, per se.
Subclass:
56.52
Axially engaged:
This subclass is indented under subclass 56.51. Subject
matter wherein movement of the clutch elements to the engaged
condition is in a direction parallel to the rotation axis of
the clutch.
Subclass:
56.53
Positive:
This subclass is indented under subclass 56.52. Subject
matter wherein the clutch elements have formations thereon
which intermesh to transmit torque without slip.
Subclass:
56.54
Ball or roller:
This subclass is indented under subclass 56.53. Subject
matter wherein at least one of the formations is a spherical
or generally cylindrical member.
Subclass:
56.55
Axially engaged:
This subclass is indented under subclass 56.5. Subject
matter wherein movement of the clutch elements to the engaged
condition is in a direction parallel to the rotation axis of
the clutch.
Subclass:
56.56
Positive:
This subclass is indented under subclass 56.55. Subject
matter wherein the clutch elements have formations thereon
which intermesh to transmit torque without slip.
Subclass:
56.57
Ball or roller:
This subclass is indented under subclass 56.56. Subject
matter wherein at least one of the formations is a spherical
or generally cylindrical member.
Subclass:
56.6
Axially engaged:
This subclass is indented under subclass 56.1. Subject
matter wherein movement of the clutch elements to the engaged
condition is in a direction parallel to the rotation axis of
the clutch.
Subclass:
56.61
Positive:
This subclass is indented under subclass 56.6. Subject
matter wherein the clutch elements have formations thereon
which intermesh to transmit torque without slip.
Subclass:
56.62
Ball or roller:
This subclass is indented under subclass 56.61. Subject
matter wherein at least one of the formations is a spherical
or generally cylindrical member.
Subclass:
57
This subclass is indented under subclass 30. Clutches
include an ordinary friction or other mechanically clutching
part combined with a clutch in which the resisting part is
enveloped in the clutching material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3.21 for a combination of vortex-flow drive and clutch.
48.1 for other plural clutch-assemblages.
SEE OR SEARCH CLASS:
188, Brakes, subclass 271 for a surface- friction brake
combined with a fluid- resistance brake.
Subclass:
58.1
Fluent material:
This subclass is indented under subclass 30. Subject matter
in which a clutching medium envelopes at least one of a pair
of clutch members and is a fluid or any substance the
particles of which readily flow over each other.
SEE OR SEARCH CLASS:
60, Power Plants, 330 for fluid couplings which include the
transmission of torque through kinetic forces resulting from
acceleration and deceleration of the fluid effective between
the driving and driven elements of the coupling. Where the
driven element includes a fluid channel or space between
vanes which communicates with regions of the driving element
which are maintained at different fluid pressures or are
moving at different velocities, the resulting forces are
considered kinetic and such structures are found in Class
60.
188, Brakes, 266 for a similar structure used as a brake.
464, Rotary Shafts, Gudgeons, Housings and Flexible Couplings
for Rotary Shafts, 24 for a flexible coupling wherein a
liquid or gas is used to affect the coupling, and see the
line note with Class 192 under the class definition of Class
464.
Subclass:
58.2
Fluid:
This subclass is indented under subclass 58.1. Subject
matter wherein the clutching medium is a liquid or a gas.
(1) Note. Where the clutching medium is not a liquid or gas
(e.g., a powder or gellike plastic fluid mass) classification
is proper in subclass 58.1.
Subclass:
58.3
Vane clutch:
This subclass is indented under subclass 58.2. Subject
matter wherein at least one of the members is provided with a
projection acting as a scoop or paddle which propels the
clutching medium against the other of the members to transmit
torque therebetween.
Subclass:
58.4
Viscous shear:
This subclass is indented under subclass 58.2. Subject
matter wherein torque is transmitted by fluid friction acting
on surfaces of the clutch members.
Subclass:
58.41
Multiple plate:
This subclass is indented under subclass 58.4. Subject
matter wherein there is a plurality of disclike elements on
one clutch member interleaved with a plurality of disclike
elements on the other of the clutch members.
Subclass:
58.42
Variable gap or volume:
This subclass is indented under subclass 58.41. Subject
matter wherein means are provided for adjusting the spacing
between the disclike elements or for adjusting the volume of
a chamber in which the liquid or gas is contained.
Subclass:
58.43
Variable gap or volume:
This subclass is indented under subclass 58.4. Subject
matter wherein means are provided for adjusting the spacing
of the surfaces of the clutch members or adjusting the volume
of a chamber in which the liquid or gas is contained.
Subclass:
58.5
Separate reservoir:
This subclass is indented under subclass 58.4. Subject
matter wherein one of the clutch members rotates in a space
defined by a housing, which housing has a working chamber in
which fluid friction between the members occurs and wherein a
separate storage chamber is provided in which the liquid or
gas can be collected.
(1) Note. The housing referred to above may be defined by
the other of the members; e.g., a housing is coupled to a
part to be driven and a disc rotatable in the housing is
coupled to a driving part.
Subclass:
58.6
Automatic regulation:
This subclass is indented under subclass 58.5. Subject
matter wherein means are provided to control the flow of
fluid between the working chamber and the storage chamber in
response to at least one sensed condition.
Subclass:
58.61
Magnetic or electric:
This subclass is indented under subclass 58.6. Subject
matter wherein the means which controls the flow between
chambers is magnetically or electrically operated.
Subclass:
58.62
Temperature and speed:
This subclass is indented under subclass 58.6. Subject
matter wherein the sensed condition includes both a level of
heat and a rate of rotation.
Subclass:
58.63
Temperature:
This subclass is indented under subclass 58.6. Subject
matter wherein the sensed condition is a level of heat.
Subclass:
58.64
Coolant and clutching medium:
This subclass is indented under subclass 58.63. Subject
matter wherein the sensed condition is a level of heat in the
clutching medium and the level of heat in a separate liquid
used to cool a related device.
(1) Note. The related device is typically an internal
combustion engine.
SEE OR SEARCH CLASS:
123, Internal-Combustion Engines, subclass 41.12, for similar
devices in combination with an internal combustion engine.
Subclass:
58.65
Ambient and clutching medium:
This subclass is indented under subclass 58.63. Subject
matter wherein the sensed condition is a level of heat in the
clutching medium and the level of heat of air external to and
immediately surrounding the clutch.
Subclass:
58.66
Ambient and coolant:
This subclass is indented under subclass 58.63. Subject
matter wherein the sensed condition is a level of heat in air
external to and immediately surrounding the clutch and the
level of heat in a separate liquid used to cool a related
device.
Subclass:
58.67
Clutching medium:
This subclass is indented under subclass 58.63. Subject
matter wherein the sensed condition is the level of heat in
the clutching medium.
Subclass:
58.68
Ambient:
This subclass is indented under subclass 58.63. Subject
matter wherein the sensed condition is the level of heat in
air external to and immediately surrounding the clutch.
Subclass:
58.681
Bimetallic:
This subclass is indented under subclass 58.68. Subject
matter wherein the level of heat of the surrounding air is
sensed by an element comprised of at least two metals having
dissimilar coefficients of thermal expansion, the element
moving in response to a change in the level of heat to effect
control of the level of clutching medium in the working
chamber (e.g., by operating a valve).
Subclass:
58.682
Spiral:
This subclass is indented under subclass 58.681. Subject
matter wherein the element is coiled in plural convolutions
which lie substantially in the same plane.
Subclass:
58.683
Resilient or adjustable mounting feature:
This subclass is indented under subclass 58.682. Subject
matter wherein at least one end of the element is attached to
a support on the clutch by recoilably yieldable means or by
means permitting a change in the position of attachment.
Subclass:
58.684
Mounting feature:
This subclass is indented under subclass 58.681. Subject
matter wherein the specifics of the attachment of the element
to the clutch are cited as significant.
Subclass:
58.7
Pump-out feature:
This subclass is indented under subclass 58.5. Subject
matter wherein a device is provided to force fluid from the
working chamber to the storage chamber and wherein the shape,
arrangement or material of said device is cited as
significant.
Subclass:
58.8
Specific valve:
This subclass is indented under subclass 58.5. Subject
matter wherein a device is provided for opening and closing a
fluid passage extending between the storage and working
chamber and wherein the shape, arrangement or material of
said device is cited as significant.
Subclass:
58.9
Radial vane:
This subclass is indented under subclass 58.2. Subject
matter, having a clutch member disposed radially inward of
another clutch member, and one of the clutch members carries
bladelike elements which slidably engage the other member,
rotation being transmitted through circumferential
compression of the fluid.
Subclass:
58.91
Vanes on inner member:
This subclass is indented under subclass 58.9. Subject
matter wherein the bladelike elements are carried by the
radially inward member to slidably engage an inwardly facing
surface on the other member.
Subclass:
58.92
Spring-biased:
This subclass is indented under subclass 58.91. Subject
matter wherein recoilably yieldable means are provided to
impart a radially outwardly directed force on the bladelike
elements.
Subclass:
59
This subclass is indented under subclass 58.1. Clutches + in
which the rotating driving member propels one or more pistons
against the action of the clutching fluid in a direction
parallel to the axis of rotation.
SEE OR SEARCH CLASS:
188, Brakes, 290 for similar structure used as a brake.
Subclass:
60
This subclass is indented under subclass 58.1. Clutches + in
which the pistons move transversely to the axis of rotation,
against the action of the clutching fluid.
SEE OR SEARCH CLASS:
188, Brakes, 290 for similar structure used as a brake.
Subclass:
61
This subclass is indented under subclass 58.1. Clutches + in
which the rotation is transmitted by means of the clutching
fluid, which is forced between meshed gears.
(1) Note. Both this subclass, and Class 475, Planetary Gear
Transmission Systems or Components, subclasses 91+, contain
planetary units including gear pumps so arranged that when
fluid flow through the pump is unrestricted, the unit slips,
as the fluid flow is restricted, the unit planetates, and
when fluid flow is completely shut off, the gear elements
forming the pump are locked against relative rotation and the
unit is locked. Where a planet pinion of the unit drives a
separate gear pump, the pump, in fact, operates as a planet
pinion brake, and such art will be found in the appropriate
one of the above listed subclasses in Class 475. Where a
planet pinion and its intermeshing sun or orbit gear together
constitute the gear pump, the device will be found in this
subclass (192/61).
SEE OR SEARCH CLASS:
188, Brakes, subclass 292 for similar structure used as a
brake.
418, Rotary Expansible Chamber Devices, 54 for rotary
expansible chamber devices for working members having
planetary or planetating movement; subclasses 166+ for rotary
expansible chamber devices of the moving cylinder type having
intermeshing peripheral surfaces and subclasses 191+ for
rotary expansible devices having interengaging rotary
members.
475, Planetary Gear Transmission Systems or Components, 91,
and see (1) Note above.
Subclass:
62
This subclass is indented under subclass 30. Clutches
adapted for use in raising plows.
SEE OR SEARCH CLASS:
172, Earth Working, 403 and 407+ especially subclasses 410+
for earth working apparatus comprising a clutch associated
with a wheel for lifting a plow.
Subclass:
63
This subclass is indented under subclass 30. Clutches for
engine-drives designed to permit at times the engine to run
free without transmitting power.
SEE OR SEARCH THIS CLASS, SUBCLASS:
42 for automatic type of free-engine clutch.
Subclass:
64
This subclass is indented under subclass 30. Clutches
designed to permit a velocipede wheel to run freely when the
pedals are held.
SEE OR SEARCH THIS CLASS, SUBCLASS:
41 for one-way clutches.
Subclass:
65
This subclass is indented under subclass 30. Clutches in
which the engaging elements of the clutches have both a
motion parallel and a motion transverse to the axis of
rotation.
Subclass:
66.1
Axially engaging:
This subclass is indented under subclass 30. Subject matter
wherein at least one engaging member is movable parallel to
the axis of rotation to engage or disengage at least one
other member.
Subclass:
66.2
Conical or frustoconical:
This subclass is indented under subclass 66.1. Subject
matter wherein engaging faces of the members are in the form
of a cone or frustocone.
Subclass:
66.21
Plural radially spaced surfaces:
This subclass is indented under subclass 66.2. Subject
matter, with two or more concentric conical or frustoconical
surfaces on each engaging member.
Subclass:
66.22
Spring engaged:
This subclass is indented under subclass 66.2. Subject
matter wherein the faces are moved to a torque transmitting
position by the action of a recoilably yieldable member.
Subclass:
66.23
Spring released:
This subclass is indented under subclass 66.2. Subject
matter wherein the faces are moved to the disengaged position
by the action of a recoilably yieldable member.
Subclass:
66.3
Planar radially extending:
This subclass is indented under subclass 66.1. Subject
matter wherein engaging faces of the members are disposed in
a plane perpendicular to the rotation axis.
Subclass:
66.31
Spring engaged:
This subclass is indented under subclass 66.3. Subject
matter wherein the faces are moved to a torque transmitting
position by the action of a recoilably yieldable member.
Subclass:
66.32
Spring released:
This subclass is indented under subclass 66.3. Subject
matter wherein the faces are moved to the disengaged position
by the action of a recoilably yieldable member.
Subclass:
69
Positive:
This subclass is indented under subclass 66.1. Clutches in
which the axially movable members carry elements that
intermesh to transmit torque without slip.
SEE OR SEARCH THIS CLASS, SUBCLASS:
108 for improvements in the engaging faces, per se, of
interlocking or positively engaged clutches.
Subclass:
69.1
Pivoting positive clutch element:
This subclass is indented under subclass 69. Subject matter
wherein at least one of the members includes an element which
is swingably mounted to a point of attachment thereto and is
engageable with another of the clutch members.
Subclass:
69.2
Plunger disconnect:
This subclass is indented under subclass 69. Subject matter
wherein a finger moving generally transversely to the axis of
rotation of the clutch engages cooperating structure (e.g., a
screw) which causes the engaging members to move to the
disengaged position.
Subclass:
69.3
Pilot pawl:
This subclass is indented under subclass 69. Subject matter
wherein a member is provided with a swinging finger which
engages ratchet teeth and is effective to cause synchronous
engagement of the intermeshed elements.
Subclass:
69.4
Wheel hub clutched to axle:
This subclass is indented under subclass 69. Subject matter
wherein the positive clutch engages a wheel hub to an axle
(e.g., in a four-wheel drive vehicle).
SEE OR SEARCH THIS CLASS, SUBCLASS:
54.2 for hub clutches which engage in response to torque on
the axle.
SEE OR SEARCH CLASS:
180, Motor Vehicles, subclass 247 for a manual means to
disengage drive to one or more, but fewer than all four of
the wheels.
403, Joints and Connections, subclass 1 for selectively
engageable hub to shaft connections.
Subclass:
69.41
Fluid pressure:
This subclass is indented under subclass 69.4. Subject
matter wherein one of the members of the positive clutch is
shifted either into or out of engagement with another member
by hydraulic or pneumatic pressure.
Subclass:
69.42
Electromagnetic:
This subclass is indented under subclass 69.4. Subject
matter wherein one of the members of the positive clutch is
shifted axially either into or out of engagement with another
member by the action of a solenoid or electric motor.
Subclass:
69.43
Manual:
This subclass is indented under subclass 69.4. Subject
matter wherein one of the members of the positive clutch is
shifted axially into or out of engagement with another member
by an operator manipulated knob or handle disposed on the hub
or axle.
Subclass:
69.5
Ball or roller:
This subclass is indented under subclass 69. Subject matter
wherein at least one of the intermeshed elements is generally
spherical or cylindrical and rotatably mounted relative to
its corresponding member.
Subclass:
69.6
Cylindrical pin:
This subclass is indented under subclass 69. Subject matter
wherein at least one of the intermeshed elements is an
elongated element of generally circular cross-section that is
fixedly mounted to its corresponding member.
Subclass:
69.61
Axial pin on only one member:
This subclass is indented under subclass 69.6. Subject
matter wherein only one member carries an elongated element
which extends generally parallel to the rotation axis.
Subclass:
69.62
Pin engages aperture in other member:
This subclass is indented under subclass 69.61. Subject
matter wherein the other of the engaging elements includes
apertures to receive the elongated element.
(1) Note. Here aperture is defined as a hole, slot, or
recess defined by a periphery that surrounds the pin.
Subclass:
69.63
Radial pin:
This subclass is indented under subclass 69.6. Subject
matter wherein the elongated element extends generally
transverse to the clutch rotation axis.
Subclass:
69.7
Axial-radial:
This subclass is indented under subclass 69. Subject matter
wherein one of the members includes elements extending
axially from the member and joined thereto only on a radially
extending surface of the member, and the other engaging
member has radially extending elements adapted to interlock
with the axially extending elements, the radially extending
elements being joined to its associated member at least on
one circumferential surface of the member.
Subclass:
69.71
Axially extending projection engages aperture:
This subclass is indented under subclass 69.7. Subject
matter wherein the axially extending projection engages an
aperture in the other member.
(1) Note. Here aperture is defined as a hole, slot, or
recess defined by a periphery that surrounds the axially
extending projection.
SEE OR SEARCH THIS CLASS, SUBCLASS:
69.62 for projections that are cylindrical pins.
Subclass:
69.8
Axial-axial:
This subclass is indented under subclass 69. Subject matter
wherein a pair of members each include elements extending
axially from the members and joined thereto solely on a
radially extending surface of the members.
(1) Note.The elements must have a component in the axial
direction.
Subclass:
69.81
Sawtooth:
This subclass is indented under subclass 69.8. Subject
matter wherein the axially extending elements on at least one
of the coupled members has the form of a tooth having one
engaging surface that lies in a plane substantially parallel
to or including the rotational axis and an adjacent engaging
surface that lies in a plane oblique to the rotational axis.
Subclass:
69.82
Square tooth:
This subclass is indented under subclass 69.8. Subject
matter wherein oppositely facing engaging surfaces on the
elements of both members are each perpendicular to an end
face of the element.
Subclass:
69.83
With lead-in:
This subclass is indented under subclass 69.82. Subject
matter wherein at least one of the elements includes a
configuration to facilitate engagement.
Subclass:
69.9
Radial-radial:
This subclass is indented under subclass 69. Subject matter
wherein the members each include at least one element which
extends radially and are joined to their respective member at
least on one circumferential surface of the respective
member.
Subclass:
69.91
Outward projection on movable member:
This subclass is indented under subclass 69.9. Subject
matter wherein only one of the members moves parallel to the
axis of rotation and has at least one element which extends
radially from an outer circumferential surface of said one
member.
Subclass:
70
Clutches under subclasses 66.1+ in which two axially-moving
members are spread to engage the companion members of the
clutch.
Subclass:
70.11
Device under subclasses 66.1+ having an input (i.e., driving)
shaft and an output (i.e., driven) shaft rotatable about a
common axis and at least three members supported thereby in
an array of adjacent members spaced along the axis and
co-axial with the shafts, the outer of said members having
surfaces facing opposite surfaces of one or more intermediate
members; one of said members being constrained to rotate with
one of the shafts, another of said members being constrained
to rotate with the other of the shafts but being movable
along the common axis, and a third of said members being
movable along the common axis; the device also having means
for moving said members toward one another for mutual
engagement of the facing surfaces, whereby the input shaft
transmits its rotation to the output shaft when the facing
surfaces are mutually engaged.
(1) Note. In this and indented subclasses one clutch-element
is connected to one of the shafts and is sandwiched between
two other clutch-elements that are connected to the other
shaft. In a variation of this arrangement a multiplicity
(usually more than three) of clutch-elements is connected for
rotation with one shaft and a multiplicity of clutch-elements
is connected for rotation with the other shaft, the elements
of one shaft alternating with the elements of the other
shaft. The variation described is called a "multiple-element
clutch-assemblage" in the definitions and notes of the
subclasses indented hereunder.
(2) Note. The clutch-assemblage is usually enclosed by a
"flywheel" and a "cover plate". A flywheel is a heavy
component secured to the input shaft to stabilize rotational
momentum thereof, and a cover plate (also known as a "back
plate") also encloses a "pressure plate" (which is a
component that, compared to a clutch-element, is relatively
thick and heavy) and an actuator that urges the pressure
plate towards clutch-elements lying between the pressure
plate and the flywheel to effect engagement of the
clutch-assemblage.
(3) Note. The term "shaft", as used in the definition above,
is intended as the generic name of a torque-transmitting
member which is referred to by a variety of names, including:
shaft, flywheel (usually applied to the input of an
automobile), pulley, gear, drum, hub, spindle, axle, sleeve,
etc., the named terms being only exemplary of those used.
SEE OR SEARCH CLASS:
188, Brakes, subclass 71.5 for disclosure of
rotationally-fixed elements interleaved between rotatable
elements and axially moved to retard rotation of the
rotatable elements.
Subclass:
70.12
This subclass is indented under subclass 70.11. Device
provided with means for reducing the temperature of, or for
supplying a friction-reducing fluid to, any of the members or
components of a clutch-assemblage.
(1) Note. The term "clutch-assemblage" is defined in (1)
Note to the definition of subclass 48.1 above.
SEE OR SEARCH THIS CLASS, SUBCLASS:
113 for clutch lubricating and/or cooling means, e.g., per
se.
Subclass:
70.13
This subclass is indented under subclass 70.11. Device
wherein any of the members or sub-assemblies of the device
may be taken out of the clutch-assemblage, or put back into
the clutch-assemblage, or wherein one such member or
sub-assembly may be exchanged for another such member or
sub-assembly.
(1) Note. The term "clutch-assemblage" is defined in (1)
Note to the definition of subclass 48.1 above.
(2) Note. It is inherent in any device that is assembled
from a plurality of parts that the device may be disassembled
and then re-assembled with the same or equivalent parts.
Therefore, an original patent placed in this subclass should
clearly disclose the features implicit in the title and
definition of the subclass.
Subclass:
70.14
This subclass is indented under subclass 70.11. Device
having a distinctive, structurally-significant peculiarity in
the engaging face of the member.
(1) Note. Terms such as "segmented", or "faced with
leather", or "roughened" or "tapered" are considered to be
structurally-significant descriptors of the engaging surface.
Functional terms such as "friction surface" are not proper
for this subclass (70.14), and clutch-elements so described
will be found elsewhere according to their other
characteristics.
(2) Note. Compare this subclass (70.14) with subclass 107 of
this class (192). A device in this subclass (70.14) relates
to a clutch-element clearly identifiable as part of an
opposed-element clutch-assemblage, whereas a device of
subclass 107 relates to the engaging face of an element, per
se, usable in a clutch or brake.
SEE OR SEARCH THIS CLASS, SUBCLASS:
107 for engaging elements, and see (2) Note above.
SEE OR SEARCH CLASS:
188, Brakes, subclass 73.1 for disclosure of surface
characteristics enhancing friction of a braking element, and
subclass 73.2, for disclosure of a conical braking element.
Subclass:
70.15
This subclass is indented under subclass 70.14. Device
wherein the engaging face of the member is distinctive by
being, at least in part, a frustoconical surface, and wherein
the engaging face of a member having mutual engagement with
the first-mentioned member is also a frustoconical surface
that complements the first-mentioned surface.
(1) Note. A device having clutch-elements whose adjacent
complementary engaging surfaces show a profile, on a
cross-section passing through the axis of rotation of the
clutch-elements, of V-shaped or zigzag configuration, is
proper for this subclass (70.15).
Subclass:
70.16
This subclass is indented under subclass 70.11. Device
provided with means which (a) transmits rotational force from
an input shaft to a member supported thereby, or transmits
rotational force from another member to an output shaft that
supports the other member, and (b) simultaneously permits
movement of either member relative to its supporting shaft.
(1) Note. It is emphasized that this and indented subclasses
provide for the connection between a shaft and the
clutch-element supported thereby, rather than for the means
transmitting rotation from one clutch-element to a mating
clutch-element. The permitted movement may be rotational as
in subclass 70.17 below, or axially slidable as in subclass
70.19 below, or oscillating about an axis perpendicular to
the axis of rotation of the shafts as in this subclass
(70.16).
Subclass:
70.17
This subclass is indented under subclass 70.16. Device
wherein said means is recoilably yieldable to a limited
extent in the rotation direction, whereby the permitted
movement is a limited degree of variation between the
rotation of a shaft and the rotation of the member supported
thereby.
(1) Note. It is emphasized that the amount of variation of
transmitted rotation is extremely small, and that the primary
purpose of the resilient connection is to absorb shock
inherent in the act of causing a stationary clutch-element to
be engaged suddenly by a rotating clutch-element. The
resilient connection permits the torque to be applied from
the shaft to the clutch-element supported thereby (or from
the clutch-element to its supporting shaft) without stressing
any of the parts to an excessive degree. The "permitted
movement" of the clutch-element is rotation momentarily
addition to and/or subtractive from the rotation of its
supporting shaft. However, the rotation of the clutch-element
quickly matches that of its supporting shaft.
SEE OR SEARCH THIS CLASS, SUBCLASS:
200 for a subcombination comprising a clutch-element (or
similar structure such as a brake element) resiliently
mounted on a hub.
Subclass:
70.18
This subclass is indented under subclass 70.17. Device
wherein said means comprises a link or strap having two ends,
one end of which is attached to a clutch-element (or to an
equivalent rotating member such as a pressure plate or
flywheel) at a point on the clutch-element radially spaced
from the axis of rotation thereof, and the other end of which
link is attached to a driving or driven shaft (or to an
equivalent rotating member integral therewith) at a point on
the shaft radially spaced from the axis of rotation thereof
and angularly spaced from the first-mentioned attachment.
(1) Note. The attachment at either end of the link may take
the form of a pivot pin passing through a hole in the link or
a resilient connection between the link and the
clutch-element or its supporting shaft. The necessary
requirement for this subclass (70.18) is not the form of
attachment, but rather that the link extend between the two
rotating parts (i.e., the clutch-element and its supporting
shaft) as if the link were a chordal link intersecting
circles of revolution traced by link-connecting parts of the
clutch-element and its shaft.
SEE OR SEARCH THIS CLASS, SUBCLASS:
212 for a subcombination of a clutch-element connected to a
hub by a helical-coil spring wherein the spring is chordally
disposed between the clutch-element and the hub.
Subclass:
70.19
This subclass is indented under subclass 70.16. Device
wherein the means comprises portions integral with or secured
to either shaft extending along or parallel to the axis of
rotation thereof which portions connect the member to its
supporting shaft for rotation and permit movement only in a
direction parallel to said axis.
Subclass:
70.2
This subclass is indented under subclass 70.19. Device
wherein the portions comprise gear-like teeth and grooves in
the shaft (or drum) mating with complementary grooves and
teeth in the member, (or comprise ribs and slots in the shaft
(or drum) mating with complementary slots and protrusions in
the member), and wherein a plurality of first members are in
torque-transmitting connection with an input shaft, a
plurality of second members are in torque-transmitting
connection with an output shaft coaxial with the input shaft,
and the first and second members alternate with one another
along the axis of the shafts.
Subclass:
70.21
This subclass is indented under subclass 70.11. Device
including a multiple-element clutch-assemblage the members of
which are arranged along an axis of rotation, and provided
with means for moving the members along said axis, wherein
said means causes said members to engage one another in a
predetermined succession of mutual engagements along said
axis, or to disengage from one another in the same or an
opposite succession of mutual disengagements.
(1) Note. The purpose of the structure described is to
ensure that torque from one shaft is applied gradually to the
other shaft rather than suddenly.
SEE OR SEARCH THIS CLASS, SUBCLASS:
48.7 and 52.1+, for other arrangements for progressively
transmitting load from an input to an output shaft.
Subclass:
70.22
This subclass is indented under subclass 70.11. Device
provided with means for moving a member along said axis and
with means additional to the member-moving means, which
additional means maintains the members in close contact with
one another, or maintains the members apart from one another,
until the members are released to permit movement thereof by
member-moving means.
(1) Note. Some devices of subclasses 70.29 and 70.3 below
include a toggle linkage to move a pressure plate or the
clutch-elements axially. A toggle linkage comprises two
pivotable links joined together by an intermediate pivot, and
such linkage is inherently capable of latching itself if the
intermediate pivot is moved "overcenter", i.e., past an
imaginary line connecting the end pivots. Such structure will
be proper for this subclass (70.22) only when the toggle
linkage locks itself, i.e., is moved "overcenter".
SEE OR SEARCH THIS CLASS, SUBCLASS:
70.29 and 70.3, for a toggle-link actuator and see (1) Note
above.
114 for element-locking means, e.g., per se.
Subclass:
70.23
This subclass is indented under subclass 70.11. Device
provided with means for moving a member along said axis
wherein the member-moving means includes a movable component
having a surface in sliding engagement with a surface portion
of a member or of a pressure plate, the component surface and
the member or plate surface being so related and contoured
that movement of the component in a predetermined direction
is converted into axial movement of the member or pressure
plate.
(1) Note. A device is proper for this subclass (70.23) even
if sliding friction between the cam surfaces is reduced by
use of a roller at the area of contact between the cam and
the clutch-element or pressure plate.
(2) Note. The movement of the component is usually
oscillation in the case of a cam, and reciprocation (often in
a radial direction) in the case of a wedge.
(3) Note. A device is proper for this subclass (70.23) if
its cam or wedge contacts a cam surface on a flywheel that
has an engaging surface equivalent to a clutch-element
surface.
Subclass:
70.24
This subclass is indented under subclass 70.23. Device
wherein the component comprises a lever pivoted between its
ends for oscillation in a plane parallel to the axis of
rotation of the clutch-assemblage, and the lever having the
sliding surface at one of its ends, whereby oscillation of
the component within the plane is converted into axial
movement of the member of the pressure plate.
Subclass:
70.25
This subclass is indented under subclass 70.11. Device
provided with means for moving a member along said axis and
with means additional to the member-moving means, which
additional means is capable of axially changing the
positional relationship between one of the members and a
member mating therewith, such change being additional to the
movement effected by the member-moving means.
(1) Note. The structure described is for the purpose of
offsetting the decrease in the axial dimension of the
clutch-elements due to attrition of the surfaces of the
elements that occurs as they are repeatedly engaged and
disengaged under load.
SEE OR SEARCH THIS CLASS, SUBCLASS:
111 for wear-compensating means, e.g., per se.
Subclass:
70.26
This subclass is indented under subclass 70.25. Device
provided with two or more of said additional means, each of
which additional means comprises a bolt or threaded male
member rotatable relative to a nut or threaded female
member.
(1) Note. Each of the plurality of screws or bolts is
disposed radially outwardly of the axis of rotation of the
shafts, and each is angularly spaced from the others (usually
equally spaced) so that the amount of adjustment of each of
the screws may be chosen to compensate for that degree of
wear required by the portion of the clutch-element surface
adjacent to that screw.
Subclass:
70.27
This subclass is indented under subclass 70.11. Device
provided with means for moving a member along said axis,
wherein the member-moving means includes at least one elastic
body that tends to recover its shape when distorted.
(1) Note. A "Belleville" spring (i.e., a relatively thin,
resilient disc that is dished or tapered in shape) is found
herein, as well as a common coil spring. Usually the spring
acts along a line parallel to or coinciding with the axis of
rotation of the shaft.
Subclass:
70.28
This subclass is indented under subclass 70.27. Device
wherein the elastic bodies tend to move the members apart
from one another.
(1) Note. Examples of devices in this subclass (70.28)
include: a device wherein a spring is used alternatively to
engage or to disengage the clutch-elements, and a device
wherein a spring is stressed (as by actuating a lever) only
when the clutch-elements are to be disengaged. The necessary
requirement is not the means for urging the clutch-elements
into engagement (such means will be found elsewhere in this
class (192) but rather than a spring is used to disengage the
clutch-elements.
Subclass:
70.29
This subclass is indented under subclass 70.27. Device
wherein the member-moving means also includes a bar
oscillatable about a fulcrum by application of force thereto,
which fulcrum is connected to or mounted on a pressure plate,
said fulcrum being a pivot pin or the equivalent of a "knife
edge" about which the bar oscillates.
SEE OR SEARCH THIS CLASS, SUBCLASS:
70.22 for a "toggle linkage" pivoted on a pressure plate,
and see (1) Note to the definition of subclass 70.22 for a
relationship between the subclasses.
70.3 for an actuator level pivoted on a back plate, or on
both a back plate and a pressure plate.
Subclass:
70.3
This subclass is indented under subclass 70.11. Device
provided with means for moving a member along said axis,
wherein the member-moving means includes a bar oscillatable
about a fulcrum by application of force thereto, which
fulcrum is connected to or mounted on a pressure plate or a
cover plate, said fulcrum being a pivot pin or the equivalent
of a "knife edge" about which the bar oscillates.
SEE OR SEARCH THIS CLASS, SUBCLASS:
70.22 for a "toggle linkage" pivoted on a pressure plate and
a cover plate, and see (1) Note to the definition of subclass
70.22 for a relationship between the subclasses.
70.29 for an actuator lever pivoted on a pressure plate and
opposed or aided by a spring means.
Subclass:
-2
Transversely engaged:
This subclass is indented under subclass 30. Clutches in
which the movable engaging element has movement transverse to
the axis of rotation.
Subclass:
71
Clutches under Transversely engaged in which the clutch
elements engage positively.
Subclass:
72
Clutches under Transversely engaged in which the
transversely-moving member or members engage other members
both exteriorly and interiorly.
Subclass:
73
This subclass is indented under subclass 72. Clutches in
which the member or members moving transversely grip an
intermediate member.
Subclass:
74
Clutches under Transversely engaged in which the member
moving transversely, becomes engaged with the interior of a
rotatable member.
Subclass:
75
This subclass is indented under subclass 74. Clutches in
which two or more members, moving transversely away from the
axis of rotation, engage the interior of the rim or rotatable
member.
Subclass:
76
This subclass is indented under subclass 75. Clutches in
which the motion of the transversely-engaging members is
radial.
Subclass:
77
This subclass is indented under subclass 75. Clutches in
which the transversely-moving member is a split ring.
(1) Note. The split ring is usually released from engagement
by its own resilience.
Subclass:
78
This subclass is indented under subclass 77. Clutches in
which the split ring is spread by means of a cam.
Subclass:
79
Clutches under Transversely engaged, in which the
transversely moving members engage the exterior of the
rotating part.
Subclass:
80
This subclass is indented under subclass 79. Clutches in
which the exterior transversely-moving member is a flexible
strap or band.
Subclass:
81
This subclass is indented under subclass 80. Clutches in
which the strap encircles the drum or wheel in two or more
folds.
Subclass:
82
This subclass is indented under subclass 30. Devices for
actuating clutches.
Subclass:
83
This subclass is indented under subclass 82. Devices which
include two or more devices for operating the same clutch.
Subclass:
84.1
Electric or magnetic:
This subclass is indented under subclass 82. Subject matter,
wherein frictional or interlocking engagement of driving and
driven clutch parts is effected by attraction between
elements having opposite potential or polarity.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3.56 12, 17, or 18 for an electric or magnetic component
involving a clutch and brake system.
21.5 for a field responsive system.
40 for an electric or magnetic component in a manually
controlled clutch.
48.2 for an electrically actuated plural clutch assemblage.
53.2 for a positive frictional clutch operated by electric
or magnetic means.
54.4 for a magnetic or electromagnetic torque responsive
clutch.
56.4 + for an overload release having magnetic or
electromagnetic means
69.42 for a wheel hub clutched to axle having
electromagnetic means.
90 for an operator that is spring engaged having electric
release.
SEE OR SEARCH CLASS:
188, Brakes, 158 for an electric operator for a frictional
damping system.
310, Electrical Generator or Motor Structure, 92 for an
electrically operated clutch in a motor or generator.
335, Electricity: Magnetically Operated Switches, Magnets,
and Electromagnets, 220 for electromagnetic operators, per
se.
464, Rotary Shafts, Gudgeons, Housings, and Flexible
Couplings for Rotary Shafts, subclass 29 for an electrical
or magnetic coupling.
Subclass:
84.2
Plural coils:
This subclass is indented under subclass 84.1. Subject
matter, wherein clutch engagement is effected by the
attraction between poles of opposite magnetic polarity and
these poles are the result of a magnetic field produced by
the flow of electric current in two or more distinct windings
of conductors.
Subclass:
84.21
Plural armatures:
This subclass is indented under subclass 84.2. Subject
matter, wherein two or more windings effect movement of two
or more independently movable, magnetizable members.
Subclass:
84.3
Including permanent magnet:
This subclass is indented under subclass 84.1. Subject
matter, wherein a material which naturally attracts iron
provides opposite polarities that affect engagement of the
driving and driven clutch parts.
Subclass:
84.31
And electromagnet:
This subclass is indented under subclass 84.3. Subject
matter, wherein a field produced by the flow of electric
current in a coiled conductor also affects engagement of the
clutch parts.
Subclass:
84.4
Electrostatic:
This subclass is indented under subclass 84.1. Subject
matter, wherein engagement of driving and driven clutch parts
is effected by the electro-adhesive forces between a
conductive member and a semi-conductive member subjected to
an electric-potential difference.
Subclass:
84.5
Air gap adjustment:
This subclass is indented under subclass 84.1. Subject
matter, wherein structure is provided to set to a
predetermined value a distance between elements of opposite
magnetic polarities when the clutch parts are in a disengaged
condition.
SEE OR SEARCH THIS CLASS, SUBCLASS:
110 for adjusting devices, per se.
111 for wear compensators, per se.
Subclass:
84.51
Automatic:
This subclass is indented under subclass 84.5. Subject
matter, wherein the distance is set without manipulation by
an operator.
SEE OR SEARCH THIS CLASS, SUBCLASS:
111 for automatic wear compensators, per se.
Subclass:
84.6
Rotary electric motor is clutch actuator:
This subclass is indented under subclass 84.1. Subject
matter, wherein the attraction between elements of opposite
magnetic polarity produces a relative rotation between the
elements which, through a motion converting mechanism,
effects engagement of driving and driven clutch parts.
Subclass:
84.7
Mechanical force increasing means:
This subclass is indented under subclass 84.1. Subject
matter, wherein structure is provided to amplify a
clutch-engaging force after an initial clutch engagement is
effected by the attraction between elements of opposite
magnetic polarity.
Subclass:
84.8
Operator for transversely engaging elements:
This subclass is indented under subclass 84.1. Subject
matter, wherein driving and driven parts rotate about an axis
and are engageable by a motion in a direction perpendicular
to said axis.
SEE OR SEARCH THIS CLASS, SUBCLASS:
71 and 81, for transversely engaging clutches, per se.
Subclass:
84.81
Coil spring:
This subclass is indented under subclass 84.8. Subject
matter, wherein one of the driving and driven clutch parts is
an elongated member wound into a helix shape that is adapted
to unwind into or out of frictional engagement with the other
clutch part.
SEE OR SEARCH THIS CLASS, SUBCLASS:
89.2 for a spring-engaged operator.
Subclass:
84.9
Operator for axially engaging elements:
This subclass is indented under subclass 84.1. Subject
matter, wherein the driving and driven clutch parts rotate
about an axis and are engageable by a motion in a direction
parallel to said axis.
Subclass:
84.91
Interposed friction elements:
This subclass is indented under subclass 84.9. Subject
matter, wherein frictional engagement is provided by three or
more friction elements with one or more of the friction
elements being sandwiched between adjacent elements.
SEE OR SEARCH THIS CLASS, SUBCLASS:
70.11 appropriate subclasses for clutches, per se, having
interposed friction elements.
Subclass:
84.92
Positively engaging elements:
This subclass is indented under subclass 84.9. Subject
matter, wherein the driving and driven clutch parts carry
formations which interlock to transmit torque without slip.
SEE OR SEARCH THIS CLASS, SUBCLASS:
69.42 for positively engaging clutches, per se.
Subclass:
84.93
Magnetic flux path spaced from engaging elements:
This subclass is indented under subclass 84.9. Subject
matter, wherein the engagement is effected by a magnetic
circuit which bypasses the engaging surfaces of the clutch
parts.
Subclass:
84.94
Specified torque transmitting spring:
This subclass is indented under subclass 84.9. Subject
matter, wherein one or more of the elements moving parallel
to the axis is connected to one of the driving and driven
clutch parts by one or more resilient members and wherein the
shape, arrangement, or material of the one or more resilient
members is cited as significant.
Subclass:
84.941
Nonmetallic:
This subclass is indented under subclass 84.94. Subject
matter, wherein the one or more resilient members is formed
of a material other than metal.
Subclass:
84.95
With slip rings:
This subclass is indented under subclass 84.9. Subject
matter, wherein an electromagnet is carried by and rotates
with one of the driving and driven parts and electric current
is supplied to the electromagnet by a connection including
brushes and rotary contacts.
Subclass:
84.951
With pulley or gear:
This subclass is indented under subclass 84.95. Subject
matter, wherein torque is transmitted to or from one of the
driving and driven clutch parts by means of a toothed member
or a torque transmitting belt or chain.
Subclass:
84.96
Fixed concentric coil:
This subclass is indented under subclass 84.9. Subject
matter, wherein a stationary, annular electromagnetic coil
surrounds the clutch axis and magnetizes one of the driving
and driven clutch parts to provide a pole piece which
attracts the other of the driving and driven clutch parts
into engagement therewith.
Subclass:
84.961
With pulley or gear:
This subclass is indented under subclass 84.96. Subject
matter, wherein torque is transmitted to or from one of the
driving and driven clutch parts by means of a toothed member
or a torque transmitting belt or chain.
Subclass:
85
This subclass is indented under subclass 82. Devices in
which the action of fluid under pressure is used to operate
the clutch.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3.29 and 3.33, for a fluid-pressure operator to engage or
actuate a clutch that is combined with a vortex-flow drive.
SEE OR SEARCH CLASS:
92, Expansible Chamber Devices, appropriate subclasses for an
expansible chamber device, per se, even though disclosed as a
means to operate a clutch.
303, Fluid-Pressure and Analogous Brake Systems, appropriate
subclasses for systems of distribution of fluid to motors of
more general application.
Subclass:
86
This subclass is indented under subclass 85. Devices in
which the fluid-pressure is utilized both to set the clutch
in an engaging position and to release it.
Subclass:
87.1
This subclass is indented under subclass 85. Device in which
the fluid under pressure is applied to clutch-actuator means
for engaging or disengaging one or more of a plurality of
clutches.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3.25 for a combination of vortex-flow drive and a plurality
of clutches, wherein the clutches may be fluid-pressure
actuated.
48.1 for a combination of multiple clutches that are
mechanically actuated.
Subclass:
87.11
This subclass is indented under subclass 87.1. Device
wherein the functioning of one clutch-actuator is unrelated
to the functioning of another clutch-actuator.
(1) Note. This (or an indented) subclass is the locus, for
example, of a claim directed to the combination of three
clutches, two of which are alternatively engaged (i.e., one
is engaged while the other is disengaged), and the third of
which may be engaged regardless of the condition of either of
the first two clutches. A claim wherein a plurality of
clutches must all be engaged or disengaged simultaneously is
not considered as proper for this subclass but will be found
in subclass 87.1 above.
Subclass:
87.12
This subclass is indented under subclass 87.11. Device,
whose clutch includes a rotating portion, and whose clutch
actuator is pressurized upon the attainment of a
predetermined angular velocity of the rotating portion.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3.31 for a speed-responsive operator for a vortex-flow
drive-lock-up clutch.
Subclass:
87.13
This subclass is indented under subclass 87.11. Device
provided with a multiway valve unit effective to direct the
pressurized fluid to the actuator for any, all, or none of
the clutches.
SEE OR SEARCH THIS CLASS, SUBCLASS:
87.18 for a fluid-pressure distributor for alternate clutch
actuators.
SEE OR SEARCH CLASS:
137, Fluid Handling, 625, for a multiway valve unit, per se.
Subclass:
87.14
This subclass is indented under subclass 87.1. Device having
only two clutches, wherein either clutch, (but not both
simultaneously) is in force-transmitting relationship.
(1) Note. A patent directed to the combination of more than
two clutches will be placed in subclass 87.1 or 87.11+ as
appropriate.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3.27 for the combination of a vortex-flow drive and
alternatively operative clutches.
Subclass:
87.15
This subclass is indented under subclass 87.14. Device
wherein both clutches are rotatable about the same axis of
rotation and the means that actuates each clutch is a
pressure-receiving member that acts (i.e., moves under
fluid-pressure) along said axis of rotation.
Subclass:
87.16
This subclass is indented under subclass 87.15. Device
wherein both clutches are actuated by the same
pressure-receiving member or by pressure-receiving members
that are secured together.
(1) Note. The actuator of the disclosures herein may
comprise an enclosure divided into two chambers by a
relatively movable partition. Pressure is applied to one or
the other of the chambers to cause the movement of the
partition or the enclosure. If the partition is moved, it is
the piston (i.e., pressure-receiving member) common to both
clutch-actuators. If the enclosure is moved its interior end
faces are effectively pistons, and since the "pistons" are
rigidly connected together, the enclosure is the
pressure-receiving member common to both clutch actuators.
Subclass:
87.17
This subclass is indented under subclass 87.16. Device
wherein the pressure-receiving member is located in the space
separating the clutches.
Subclass:
87.18
This subclass is indented under subclass 87.14. Device
provided with a multiway valve unit effective to direct the
pressurized fluid to the actuator for either one of the
clutches or neither of them.
SEE OR SEARCH THIS CLASS, SUBCLASS:
87.13 for a fluid-pressure distributor for a plurality of
clutch-actuators.
SEE OR SEARCH CLASS:
137, Fluid Handling, 625 for a multiway valve unit, per se.
Subclass:
87.19
This subclass is indented under subclass 87.18. Device
wherein the unit can be caused to apply no pressure to the
actuator for either clutch.
(1) Note. Included herein are patents disclosing use of the
neutral position of a multiway valve for relieving residual
pressure in the actuators of both clutches at the same time.
Subclass:
88
This subclass is indented under subclass 85. Devices in
which the fluid-pressure is applied through a motor having
flexible walls.
SEE OR SEARCH CLASS:
92, Expansible Chamber Devices, 34 for a bellows type
expansible chamber device, and subclasses 90+ for a flexible
wall type expansible chamber device.
Subclass:
89.1
Weight operated:
This subclass is indented under subclass 82. Structure,
wherein an operating mechanism of the clutch is activated by
gravitational force.
SEE OR SEARCH THIS CLASS, SUBCLASS:
103 for a clutch in which a weight is acted on by
centrifugal force, acceleration, or inertia to operate a
speed-responsive clutch.
Subclass:
89.2
Spring engaged:
This subclass is indented under subclass 82. Structure,
wherein the clutch is operated to the engaged position by a
resilient means.
Subclass:
89.21
Cam release:
This subclass is indented under subclass 89.2. Structure,
wherein an element having an eccentric surface or groove is
employed to release the clutch in opposition to the resilient
means.
Subclass:
89.22
Belleville disc spring:
This subclass is indented under subclass 89.2. Structure,
wherein the resilient means is a relatively thin, resilient
annular disc that is dished or tapered in shape.
Subclass:
89.23
Push-type:
This subclass is indented under subclass 89.22. Structure,
wherein the disc spring has radially, inwardly directed
fingers and is fulcrumed such that the fingers are moved in a
direction axially toward a clutch plate in order to release
engagement.
Subclass:
89.24
Pull-type:
This subclass is indented under subclass 89.22. Structure,
wherein the disc spring has radially, inwardly directed
fingers and is fulcrumed such that the fingers are moved in a
direction axially away from a clutch plate in order to
release engagement.
Subclass:
89.25
Geometric configuration:
This subclass is indented under subclass 89.22. Structure,
wherein significance is attributed to a specific shape of the
spring structure.
Subclass:
89.26
Plural coil springs spaced from clutch axis:
This subclass is indented under subclass 89.2. Structure,
wherein the engaging force is provided by a multiplicity of
helical springs having axes positioned radially spaced from
the clutch axis.
Subclass:
89.27
Coil spring coaxial to clutch axis:
This subclass is indented under subclass 89.2. Structure,
wherein the resilient means is a helical spring concentric
with the clutch axis.
Subclass:
89.28
Transversely engaged:
This subclass is indented under subclass 89.27. Structure,
wherein an engaging element moves transversely to the axis of
the rotation of the clutch.
Subclass:
89.29
Quick throw spring:
This subclass is indented under subclass 89.2. Structure,
wherein a mechanism initially deflects or compresses a spring
after which the spring force is released allowing it to
quickly move the clutch into the engaged position.
Subclass:
90
This subclass is indented under subclass 89.2. Devices in
which electric action is employed to release the clutch.
Subclass:
91
This subclass is indented under subclass 89.2. Devices in
which the clutch is released by fluid action.
Subclass:
92
This subclass is indented under subclass 82. Devices in
which the clutch is operated to engagement and release by
successive movements of the operator in the same direction.
Subclass:
93
This subclass is indented under subclass 82. Devices in
which the clutch is operated to engaging position by some
form of cam.
Subclass:
94
This subclass is indented under subclass 82. Devices in
which the clutch is operated to engaging position by a
screw.
Subclass:
95
This subclass is indented under subclass 82. Devices in
which some form of rotating manually-controlled handle is
used to operate the clutch.
Subclass:
96
This subclass is indented under subclass 82. Devices in
which a pin or rod in the axle of rotation operates the
clutch.
Subclass:
97
This subclass is indented under subclass 96. Devices in
which the central pin operator is actuated by a screw.
Subclass:
98
This subclass is indented under subclass 82. Devices which
include elements known as "shipper-saddles" for operating the
clutch.
Subclass:
99
This subclass is indented under subclass 82. Devices
includes a simple lever or combination of levers for
actuating the clutch.
Subclass:
100
This subclass is indented under subclass 82. Devices in
which the same device operates the clutch and continues to
operate the shaft after the clutch is in engagement.
SEE OR SEARCH THIS CLASS, SUBCLASS:
19 for combined clutch and brake operated by the drive
shaft.
Subclass:
101
This subclass is indented under subclass 82. Devices for
moving the clutch to an inoperative position.
Subclass:
102
This subclass is indented under subclass 82. Devices which,
upon the driven member or operated connection being stopped
or checked, positively operates the clutch to released
position.
SEE OR SEARCH CLASS:
123, Internal-Combustion Engines, 185.1 for cranking devices
for engines.
Subclass:
103
This subclass is indented under subclass 82. Devices for
operating the clutch in response to speed.
Subclass:
104
This subclass is indented under subclass 103. Devices in
which speed-responsive elements are so arranged as to produce
slipping of the clutch if the critical speed is exceeded.
Subclass:
105
This subclass is indented under subclass 103. Devices in
which speed responsive elements are arranged to produce
engagement of the clutch when the driving member reaches a
predetermined speed.
Subclass:
106
This subclass is indented under subclass 103. Devices
include speed-responsive devices to prevent an unauthorized
engagement of a clutch.
Subclass:
107
Devices under Elements which include modifications of the
engaging surfaces of clutches.
(1) Note. Where the clutch or element is claimed with no
significant clutch or element structure, but merely in terms
of the composition or material of which it is composed, it
will be classified in the appropriate composition or material
class, even though there is no claim to the composition, per
se. In this connection, the following classes under Search
Class, below, should be considered.
(2) Note. A patent directed to a product with a frictional
property, where said property is enhanced by claimed
structure (external structure (e.g., disc, zones of friction
material; particular arrangement of strands, fibers or
layers), will be placed in this Class (192) rather than in
Class 428, Stock Material or Miscellaneous Articles, where
the sole use disclosure is as a clutch or brake.
SEE OR SEARCH CLASS:
75, Specialized Metallurgical Processes, Compositions for Use
Therein, Consolidated Metal Powder Compositions, and Loose
Metal Particulate Mixtures, subclass 231 for a composition
having a continuous phase of free metal made by consolidating
metal particles and containing a functionally defined
nonmetal constituent, e.g., abrasive. (See (1) Note,
above.)
106, Compositions: Coating or Plastic, note particularly the
class definition of Class 106 for the classification of other
compositions. (See (1) Note, above.)
106, Compositions: Coating or Plastic, subclass 36 for
tractive or friction surface compositions.
148, Metal Treatment, particularly 400 for materials which
are products of processes of treating metal classifiable in
Class 148, or for products distinguished only by the internal
structure or characteristics of the metals, metallic
compositions or alloys comprising such products. (See (1)
Note, above.)
252, Compositions, for compositions not elsewhere classified.
(See (1) Note, above.)
420, Alloys or Metallic Compositions, appropriate subclasses
for articles defined only by their alloy or metallic
composition. (See (1) Note, above.)
428, Stock Material or Miscellaneous Articles, appropriate
subclasses, for a stock material product in the form of a
single or plural layer web or sheet not elsewhere provided
for and especially 64.1 for a circular sheet, subclasses
196+ and 225+ for such a product embodying mechanically
interengaged strands (e.g., weave, knit, etc.), and
subclasses 364+ for a rod, strand, fiber or filament with
structure (e.g., nonlinear, etc.), or coated. (See (1) Note,
above and (2) Note, above.)
520, Synthetic Resins or Natural Rubbers, appropriate
subclasses, particularly Class 523, subclass 152 for a
composition containing a synthetic resin or natural rubber
having utility as a friction element for automobiles, trains,
trailers, roller skates, skateboards, or other wheeled
vehicles or to processes of preparing said composition. (See
(1) Note, above.)
Subclass:
108
This subclass is indented under subclass 107. Devices
pertaining to improvements in the engaging faces of
interlocking or positively engaged clutches.
Subclass:
109
Devices under Elements including thrust members for
cushioning the engagement of clutches, retarders for delaying
the action, and stops for defining the limits of movement.
Subclass:
110
Devices under Elements including shafts and bearings for
clutches and adjusting devices other than provided for in the
next subclass.
Subclass:
111
Devices under Elements including mechanism to compensate for
wear in effecting the engagement of clutches.
SEE OR SEARCH THIS CLASS, SUBCLASS:
70.25 for opposed clutch faces having means to effect the
engagement of the clutch faces and means to compensate for
wear in the faces.
SEE OR SEARCH CLASS:
188, Brakes, 79.5 for wear compensators for transversely
movable wheel brakes.
Subclass:
112
Devices under Elements, including liquid-tight casings to
entirely enclose the clutch.
Subclass:
113.1
Lubricating, insulating, or cooling:
This subclass is indented under subclass 103. Subject
matter, which includes means for reducing the friction or
affecting temperature of a clutch.
Subclass:
113.2
Air cooling:
This subclass is indented under subclass 113.1. Subject
matter, in which air is a cooling medium.
Subclass:
113.21
Heat radiating structure:
This subclass is indented under subclass 113.2. Structure,
which includes an element for increasing radiation of heat
away from the clutch to ambient air (e.g., having "fins",
etc.).
Subclass:
113.22
Grooved surfaces:
This subclass is indented under subclass 113.2. Structure,
wherein engaging clutch surfaces are striated to facilitate
the flow of cooling air.
Subclass:
113.23
Air directing structure:
This subclass is indented under subclass 113.2. Structure,
including a member which is contoured to forcibly direct the
flow of cooling air through or around clutch elements.
Subclass:
113.24
Rotating cover:
This subclass is indented under subclass 113.23. Subject
matter, wherein the air directing structure is a part of a
rotating encasement for the clutch.
(1) Note. Air directing structure in a fixed clutch housing
in general would be properly classified in this class,
subclass 113.23.
Subclass:
113.25
Spring:
This subclass is indented under subclass 113.23. Subject
matter, wherein the air directing structure is a part of a
clutch spring.
Subclass:
113.26
Clutch plate:
This subclass is indented under subclass 113.23. Subject
matter, wherein the air directing structure is a part of a
clutch plate.
Subclass:
113.3
Liquid cooled or lubricated clutch surfaces:
This subclass is indented under subclass 113.1. Structure,
wherein a liquid is used to reduce friction or temperature of
the clutch.
Subclass:
113.31
Entire coolant path is spaced from clutch surfaces:
This subclass is indented under subclass 113.3. Subject
matter, wherein a passageway for a coolant is spaced from
engaging surfaces of the clutch throughout its whole length.
SEE OR SEARCH THIS CLASS, SUBCLASS:
113.34 for coolant passing between engaging clutch
surfaces.
Subclass:
113.32
Overrunning clutch:
This subclass is indented under subclass 113.3. Subject
matter, which includes clutch elements which automatically
engage in response to relative rotation of the elements in
one direction and which disengage automatically in response
to relative rotation in an opposite direction.
Subclass:
113.33
Positive:
This subclass is indented under subclass 113.3. Subject
matter, which includes intermeshing elements for
interconnection of said elements without slippage.
Subclass:
113.34
Lubricant or coolant between engaging surfaces:
This subclass is indented under subclass 113.3. Structure,
including means for supplying lubricant or coolant between
engagable clutch surfaces (e.g., during slip or
disengagement).
Subclass:
113.35
With change of coolant flow during disengagement:
This subclass is indented under subclass 113.34. Structure,
having means to increase, decrease, or redirect coolant flow
during clutch disengagement.
Subclass:
113.36
Grooved surfaces:
This subclass is indented under subclass 113.34. Structure,
wherein the engagable clutch surfaces are striated to
facilitate lubricant or coolant flow.
Subclass:
113.4
Thermal insulation:
This subclass is indented under subclass 113.1. Structure,
wherein a thermal break is provided between heat generating
engaging surfaces and other elements of the clutch.
Subclass:
113.5
Lubrication of ancillary clutch parts:
This subclass is indented under subclass 113.1. Subject
matter, wherein means is provided to lubricate elements of
the clutch other than friction surfaces (e.g., to lubricate
bearings or operating mechanism).
Subclass:
114
Devices under Elements for maintaining the clutch in any set
position.
SEE OR SEARCH THIS CLASS, SUBCLASS:
70.22 for opposed clutch faces having means to effect the
engagement of the clutch faces and means to lock the elements
together.
Subclass:
115
Devices under Elements for supporting clutches and power-stop
control devices.
Subclass:
116.5
This subclass is indented under the class definition.
Mechanisms, usually automatic in operation, for stopping a
machine when a predetermined result is reached when some part
of the machine fails to function, or the material fails or is
disarranged, or when an operator's position renders him
liable to injury.
(0.5) Note. This subclass includes devices having an
electric motor drive where a mechanical stop mechanism stops
the drive independently of any motor control or
deenergization, even though the stopping of the drive
incidently causes control or deenergization of the motor.
(1) Note. For organizations and constructions of the
machines, such as presses, winding machines, etc., to which
the stop mechanism is applied, see appropriate art class.
SEE OR SEARCH CLASS:
100, Presses, subclasses 341-352 for a press not provided
for elsewhere having a safety control system and subclass 353
for a press not provided for elsewhere having an interrelated
control system.
118, Coating Apparatus, 663 for coating apparatus having
automatic control means.
188, Brakes, 82.1 for one-way brakes applied to elements
rotating relative to stationary element to prevent retrograde
rotation and see the notes thereto for other one-way brakes.
241, Solid Material Comminution or Disintegration, subclass
36 for automatic power stop mechanisms applied to
significantly included comminution.
318, Electricity: Motive Power Systems, 466 and 477 for
electric driven motor devices combined with a mechanical stop
mechanism and the stopping operation requires control of the
motor as well as operation of the stop mechanism. See Note
(0.5).
369, Dynamic Information Storage or Retrieval, subclass 79
for a phonograph cabinet closure braking actuator; and
subclasses 232 and 234+ for phonograph braking by record
structure actuation, and mechanism condition actuation,
respectively.
Subclass:
125
This subclass is indented under subclass 116.5. Stop
mechanisms in which the starting or stopping of the machine
is effected by some condition of the material being treated.
SEE OR SEARCH CLASS:
19, Textiles: Fiber Preparation, .2 for stopping of machines
that prepare fibers for making textiles.
26, Textiles: Cloth Finishing, 10 for stopping of machines
cutting pile loops.
28, Textiles: Manufacturing, 186 for stopping of warp
preparing machines; and 225, for knot or slub detectors in
thread finishing machines.
53, Package Making, appropriate subclasses for methods of and
apparatus for encompassing or encasing goods or materials
with a separate cover or band which serves as means for
identifying, protecting or unit handling the goods or
materials, particularly 55 for concurrent controls of
contents and cover feeds (subclasses 56+ being directed to
manually reset stopping under the control of the contents),
subclasses 493+ for contents feed controls, subclasses 64+
for cover feed or cover adjunct feed or application control,
and subclasses 75+ for end closing control.
57, Textiles: Spinning, Twisting, and Twining, 80 for strand
controlled stopping of spinning and twisting machines.
66, Textiles: Knitting, 157 for stopping of a knitting
machine.
72, Metal Deforming, 3 for a metal shaping machine which
includes means to sense a condition of the work or product
and exert a control operation to stop the machine in response
thereto, and subclasses 10+ for the same where the result is
an operation other than stopping.
87, Textiles: Braiding, Netting, and Lace Making, 18 for
stopping mechanisms for braiding, netting and lace making
machines.
139, Textiles: Weaving, 336 for stopping mechanisms for
looms.
198, Conveyors: Power-Driven, appropriate subclasses
including 572+ and 855+ for conveyors in which the material
handled controls the drive for the conveyor.
226, Advancing Material of Indeterminate Length, especially
subclass 37 for a strand or web feeding device which is
controlled by the material being moved.
242, Winding, Tensioning, or Guiding, 472.9, 479.9+, 484.8,
484.9+, 534+, and 563+ for a stop or detector for a winding
or unwinding device.
Subclass:
126
This subclass is indented under subclass 125. Stop
mechanisms in which the material is in the form of sheets.
SEE OR SEARCH CLASS:
53, Package Making, appropriate subclasses for methods of and
apparatus for encompassing or encasing goods or materials
with a separate cover or band which serves as means for
identifying, protecting or unit handling the goods or
materials, particularly 55 for concurrent controls of
contents and cover feeds (subclasses 64+ for cover feed or
cover adjunct feed).
271, Sheet Feeding or Delivering, sub- classes 258+ for a
device for stopping the feed of sheets.
Subclass:
127
This subclass is indented under subclass 126. Stop
mechanisms in which the control is through an electrical
agency.
SEE OR SEARCH CLASS:
87, Textiles: Braiding, Netting, and Lace Making, subclass 19
for electrical control stopping of braid, net or lace making
machines.
271, Sheet Feeding or Delivering, sub- classes 258+ for a
device for stopping the feed of sheets.
Subclass:
128
This subclass is indented under subclass 126. Stop
mechanisms in which the control is through a pneumatic
agency.
Subclass:
129
This subclass is indented under subclass 116.5. Stop
mechanisms which operate to interrupt the drive, render the
starting mechanism inoperative, or otherwise prevent
operation of the machine, as a safety expedient.
SEE OR SEARCH CLASS:
65, Glass Manufacturing, subclass 159, for an apparatus
safety device in glassworking apparatus.
470, Threaded, Headed Fastener, or Washer Making: Process and
Apparatus, subclass 43 for safety devices with bolt and
rivet making machines.
Subclass:
130
This subclass is indented under subclass 129. Safety devices
in which the control of the movement of the work element of
the machine prevents injury to the hand of the operator.
Subclass:
131
This subclass is indented under subclass 130. Safety devices
in which both hands of the operator are required to start or
maintain the operation of the machine, so that they are kept
out of the danger zone.
SEE OR SEARCH CLASS:
100, Presses, subclass 344 for a press having a safety
device which employs the use of both hands to start up the
press, where the details of the press is more than nominally
claimed.
Subclass:
132
This subclass is indented under subclass 130. Safety devices
in which positive driving connection for the work element is
made only just prior to contact of the work element with the
work.
Subclass:
133
This subclass is indented under subclass 129. Safety devices
in which guards interlock with the power element of the
machine to prevent the starting or the operative functioning
of the machine or to throw out the drive when abnormal
conditions exist.
Subclass:
134
This subclass is indented under subclass 133. Safety devices
in which the punch press type of machine is involved.
SEE OR SEARCH CLASS:
72, Metal Deforming, 1 for randomly-actuated stopping of a
metal deforming machine.
74, Machine Element or Mechanism, 613 for guard mechanisms
which do not depend upon the control of the machine.
100, Presses, subclasses 341-352 for a safety device in a
press where the details of the press is more than nominally
claimed.
Subclass:
135
This subclass is indented under subclass 133. Safety devices
in which the cover of the machine is involved.
Subclass:
136
This subclass is indented under subclass 135. Safety devices
in which the machine is of the centrifugal type.
Subclass:
137
This subclass is indented under subclass 133. Safety devices
in which the power-transmitting connections are disabled upon
the guard striking an extraneous object.
Subclass:
138
This subclass is indented under subclass 116.5. Stop
mechanisms in which the drive of the machine is discontinued
at the limit of travel.
SEE OR SEARCH CLASS:
57, Textiles: Spinning, Twisting, and Twining, subclass 79
for spinning machines which are stopped after sufficient
material has been wound in a package.
74, Machine Element or Mechanism, 10 for mechanical dial
operators and see (2) Note to the definition of subclass 10
for the line between these two classes.
91, Motors: Expansible Chamber Type, 220 for cyclically
operable expansible chamber motors having condition
responsive stop means.
112, Sewing, subclass 67 for starting and stopping of a
buttonhole machine and subclasses 271-277 for sewing machine
stopping elements.
140, Wireworking, for wire feeders having stop devices.
187, Elevator, Industrial Lift Truck, or Stationary Lift for
Vehicle, 282 and 302+ for control means for an elevator car
actuated by the car contacting a trip in the shaft.
212, Traversing Hoists, subclass 116, 280, 286, and 329 for
automatic stops for traversing hoists.
235, Registers, subclass 132 for registers which actuate
control means upon attainment of a predetermined reading of
the register.
254, Implements or Apparatus for Applying Pushing or Pulling
Force, subclass 269 for apparatus for hauling or hoisting a
load, including a cable-pulling drum which is driven around
its rotational axis and a stationary mechanism for generating
a control impulse to a rotation-retarding means of the drive
for the drum; the mechanism is actuated by the load or
another obstruction on and traveling with the cable.
369, Dynamic Information Storage or Retrieval, 234 for
similar subject matter in a phonograph.
408, Cutting by Use of Rotating Axially Moving Tool, 139 for
cutting means of that class type combined with clutch
structure disengageable by tool movement.
409, Gear Cutting, Milling, or Planing, subclass 342 for a
stop mechanism for a tool feed of a metal planing machine.
414, Material or Article Handling, subclass 674, for
automatic stops for hoists.
Subclass:
139
This subclass is indented under subclass 138. Stop
mechanisms in which stopping is controlled by a rotary member
of the machine.
Subclass:
140
This subclass is indented under subclass 139. Stop
mechanisms in which the control is through the speed of the
machine.
Subclass:
141
This subclass is indented under subclass 139. Stop
mechanisms in which control is by a screw operated by the
machine.
Subclass:
142
This subclass is indented under subclass 139. Stop
mechanisms in which stopping is controlled by
electrically-actuated elements.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, 466 for electric
motor starting and stopping in response to movement, position
or limit of travel of motor or other body or device.
Subclass:
143
This subclass is indented under subclass 138. Stop
mechanisms in which stopping is controlled by a reciprocating
member.
Subclass:
144
This subclass is indented under subclass 116.5. Stop
mechanisms in which the drive is automatically released and
the brake automatically applied.
SEE OR SEARCH THIS CLASS, SUBCLASS:
8 for brakes which are applied upon cessation of the drive.
Subclass:
145
This subclass is indented under subclass 144. Stop
mechanisms in which a plurality of clutches are involved in
the control of the machine.
Subclass:
146
This subclass is indented under subclass 144. Stop
mechanisms in which the speed is automatically reduced in
successive stages before final stopping occurs.
Subclass:
147
This subclass is indented under subclass 144. Stop
mechanisms in which the control of the drive release and
brake is in response to speed.
Subclass:
148
This subclass is indented under subclass 144. Stop
mechanisms in which the moving parts of the machine are
brought to rest by a positive stop.
Subclass:
149
This subclass is indented under subclass 148. Stop
mechanisms in which the positive stop is combined with a
cushion element.
Subclass:
150
This subclass is indented under subclass 116.5. Stop
mechanisms in which some part of the power or power and
current connection is automatically disengaged upon
occurrences of an overload.
SEE OR SEARCH THIS CLASS, SUBCLASS:
56.1 for clutches which release upon overload.
SEE OR SEARCH CLASS:
81, Tools, 467 for wrenches or screwdrivers which yield upon
a selected torque being reached.
241, Solid Material Comminution or Disintegration, subclass
32, for overload release devices associated with
comminutors.
318, Electricity: Motive Power Systems, subclass 434 for
electric motor systems including a yieldable member in the
mechanical output of the motor with means actuated by the
yieldable member for controlling the motor other than by
deenergization to limit the motor load, current or torque,
and subclasses 474+, for electric motor systems including a
yieldable member in the output of the motor with means
actuated by the yieldable member for deenergizing the motor.
Subclass:
200
Clutch element resiliently carried on hub:
Device under ELEMENTS wherein a clutch-engaging member is
rotatable about an axis and has a friction surface which is
mounted on a hollow cylindrical component by recoilably
yieldable means that connect the member to the component.
SEE OR SEARCH THIS CLASS, SUBCLASS:
55.2 for a combination of a resiliently mounted
clutch-element and such structure as is necessary to form an
operative clutch assemblage other than as provided for in
subclass 70.17.
70.17 for a combination of resiliently mounted
clutch-element and such structure as is necessary to form an
operative multidisc clutch assemblage as defined in (1) Note
under subclass 70.11.
SEE OR SEARCH CLASS:
464, Rotary Shafts, Gudgeons, Housings and Flexible Couplings
for Rotary Shafts, 51, for a resilient connection, per se,
between a shaft and a driven member such as a clutch.
Subclass:
201
Speed-responsive:
This subclass is indented under subclass 200. Subject matter
wherein structure is provided for affecting the degree of
resilience of the clutch engaging member relative to the
cylindrical component in response to the rate of rotation
thereof.
Subclass:
202
Manually adjustable:
This subclass is indented under subclass 200. Subject matter
wherein structure requiring manipulation is provided for
varying the degree of resiliency of the clutch engaging
member relative to the cylindrical component.
SEE OR SEARCH THIS CLASS, SUBCLASS:
110 for adjusting devices, per se.
Subclass:
203
Coil spring detail:
This subclass is indented under subclass 200. Subject matter
wherein the recoilably yieldable means comprises an elongated
resilient member formed into a helix and the shape or
material of the resilient member is cited as significant.
SEE OR SEARCH CLASS:
267, Spring Devices, 166 for coil springs, per se.
Subclass:
204
Specified bushing:
This subclass is indented under subclass 200. Subject matter
wherein a sleeve or plain bearing is disposed between the hub
and a member to which a friction surface is affixed to
maintain concentricity between the hub and member and the
shape or material of the sleeve or bearing is cited as
significant.
SEE OR SEARCH CLASS:
384, Bearings, 129 for a rotary plain bearing, per se.
Subclass:
205
Separate seat detail:
This subclass is indented under subclass 200. Subject matter
wherein a separate disc or cup is provided at an end of the
recoilably yieldable means.
SEE OR SEARCH CLASS:
267, Spring Devices, 170 for a spring end thrust member.
Subclass:
206
Relatively axially movable hub sections:
This subclass is indented under subclass 200. Subject matter
wherein the hollow cylindrical component comprises at least
two parts which are displaceable with respect to one another
in a direction parallel to the axis of rotation.
Subclass:
207
Circumferential resilience:
This subclass is indented under subclass 200. Subject matter
wherein the recoilably yieldable means deforms to permit
limited relative rotation between the friction surfaces and
the hollow cylindrical component in a plane perpendicular to
the axis of rotation.
Subclass:
208
With fluid damping:
This subclass is indented under subclass 207. Subject matter
wherein a liquid or gas is provided to affect the relative
rotation.
SEE OR SEARCH CLASS:
464, Rotary Shafts, Gudgeons, Housings and Flexible Couplings
for Rotary Shafts, 24 for a flexible coupling in which a
liquid or gas is used to affect or effect the coupling.
Subclass:
209
Nonmetallic:
This subclass is indented under subclass 207. Subject matter
wherein the recoilably yieldable means includes at least one
elastomeric member.
SEE OR SEARCH CLASS:
267, Spring Devices, subclass 153 for a spring device
comprising an elastomeric body, per se.
Subclass:
210
Interposed friction element:
This subclass is indented under subclass 209. Subject matter
wherein a separate element is provided between a face of a
member carrying the friction surface and a generally radial
face of a member carried by the cylindrical component, said
element in rubbing contact with at least one of the faces.
Subclass:
210.1
Biasing means:
This subclass is indented under subclass 210. Subject matter
wherein the element is urged into rubbing contact with at
least one face by a separate spring member.
Subclass:
211
And coil spring:
This subclass is indented under subclass 209. Subject matter
wherein the recoilably yieldable means further includes at
least one elongated resilient member formed into a helix.
Subclass:
212
Coil spring:
This subclass is indented under subclass 207. Subject matter
wherein the recoilably yiedable means includes at least one
elongated resilient member formed into a helix.
Subclass:
213
Plural helical coil spring damping stages:
This subclass is indented under subclass 212. Subject matter
wherein the recoilably yieldable means includes at least two
elongated resilient members each formed into a helix and
wherein for a first range of angles of relative rotation at
least one of the resilient members acts to oppose the
relative rotation with a first force and for a second range
of angles of relative rotation at least one other of the
resilient members acts to oppose further relative rotation
with a second net force which differs from the first force.
(1) Note. The at least two resilient members provide at
least two damping stages which may be due to different spring
stiffnesses or to a summing of the force of a second
resilient member with the force of a first member after a
predetermined clearance between an end of the second
resilient member and a member which acts to compress the
resilient member is taken up.
Subclass:
213.1
Plural axially spaced springs:
This subclass is indented under subclass 213. Subject matter
wherein a first helical resilient member has a centerline
disposed a predetermined distance from a centerline of a
second helical resilient member in a direction parallel to
the axis of rotation.
Subclass:
213.11
Interposed friction element:
This subclass is indented under subclass 213.1. Subject
matter wherein a separate element is provided between a face
of a member carrying the friction surface and a generally
radial face of a member carried by the cylindrical component,
said element in rubbing contact with at least one of the
faces.
Subclass:
213.12
Biasing means:
This subclass is indented under subclass 213.11. Subject
matter wherein the element is urged into rubbing contact with
at least one face by a separate spring member.
Subclass:
213.2
Plural radially spaced springs in a common radial plane:
This subclass is indented under subclass 213. Subject matter
wherein a first helical resilient member has a centerline
disposed a predetermined distance from a centerline of a
second helical resilient member in a common plane
perpendicular to the axis of rotation.
(1) Note. If the centerline of the first and second
resilient members are also spaced from one another in a
direction parallel to the axis of rotation, classification in
subclasses 213.1+ is proper.
Subclass:
213.21
Interposed friction element:
This subclass is indented under subclass 213.2. Subject
matter wherein a separate element is provided between a face
of a member carrying the friction surface and a generally
radial face of a member carried by the cylindrical component,
said element in rubbing contact with at least one of the
faces.
Subclass:
213.22
Biasing means:
This subclass is indented under subclass 213.21. Subject
matter wherein the element is urged into rubbing contact with
one face by a separate spring member.
Subclass:
213.3
Interposed friction element:
This subclass is indented under subclass 213. Subject matter
wherein a separate element is provided between a face of a
member carrying the friction surface and a generally radial
face of a member carried by the cylindrical component, said
element in rubbing contact with at least one of the faces.
Subclass:
213.31
Biasing means:
This subclass is indented under subclass 213.3. Subject
matter wherein the element is urged into rubbing contact with
one face by a separate spring member.
Subclass:
214
Interposed friction element:
This subclass is indented under subclass 212. Subject matter
wherein a separate element is provided between a face of a
member carrying the friction surface and a generally radial
face of a member carried by the cylindrical component, said
element in rubbing contact with at least one of the faces.
Subclass:
214.1
Biasing means:
This subclass is indented under subclass 214. Subject matter
wherein the element is urged into rubbing contact with one
face by a separate spring member.
Subclass:
215
TRANSMISSION AND BRAKE:
This subclass is indented under the class definition.
Subject matter including a device that receives rotary input
torque from a power source and transmits the torque to an
output load, combined with a device to retard or stop
rotation of the output load.
(1) Note. This subclass and indented subclasses are
intended as the generic locus for combinations of torque
transmitting devices and brakes not provided for elsewhere.
(2) Note. This class and indented subclasses do not include
machines and instruments or apparatuses claimed as such, for
which see the appropriate art classes. This class does not
include the special tools, instruments, and subcombination
peculiar to the special arts and provided for in the
classification of the art classes.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, especially subclass 339
for interchangeably locked gearing provided with a brake for
synchronizing the speeds of the members to be engaged and
subclass 411.5 for gearing provided with means for stopping
or preventing rotation of a gearing element.
188, Brakes, appropriate subclasses for brakes, per se.
475, Planetary Gear Transmission Systems or Components,
appropriate subclasses for combinations of planetary gear
transmissions and brake devices instrumental in controlling
the transmission.
477, Interrelated Power Delivery Controls, Including Engine
Control, appropriate subclasses for structure wherein the
operator of an engine regulates or is regulated by the
operation of a clutch, brake, or gear transmission.
Subclass:
216
Internal resistance brake:
This subclass is indented under subclass 215. Subject matter
wherein motion is retarded by movement of a member through a
medium intended to resist such movement.
SEE OR SEARCH CLASS:
188, Brakes, 266 for an internal resistance motion retarder,
per se.
Subclass:
217
Velocipede:
This subclass is indented under subclass 215. Combination
for use on a vehicle wherein an operator propels the vehicle
(e.g., by means of a pedal arrangement).
SEE OR SEARCH CLASS:
188, Brakes, 24.11 for a velocipede brake, per se.
Subclass:
217.1
Back-pedaling brake (e.g., coaster brake):
This subclass is indented under subclass 217. Subject matter
wherein the vehicle is propelled by turning a sprocket in one
direction and a brake is actuated by turning the sprocket in
the opposite direction.
Subclass:
217.2
Rotatable crank axle:
This subclass is indented under subclass 217.1. Subject
matter wherein the pedal is mounted on a sprocket which is
carried by a rotatable shaft and the brake is arranged
coaxially with an axis of the shaft.
Subclass:
217.3
Wheel hub:
This subclass is indented under subclass 217.1. Subject
matter wherein the brake is arranged coaxially with an axis
of a hollow cylindrical member at the center of and connected
to a vehicle wheel.
Subclass:
217.4
With change-speed transmission:
This subclass is indented under subclass 217.3. Subject
matter wherein the device that transmits torque to the output
can be shifted to drive the output at one of a plurality of
speed ratios relative to the input.
Subclass:
217.5
Plural sprockets:
This subclass is indented under subclass 217.4. Subject
matter wherein the device that transmits torque comprises a
chain that can be shifted to one of a plurality of toothed
discs.
Subclass:
217.6
With screw operator:
This subclass is indented under subclass 217.3. Subject
matter wherein the brake is applied by moving a member
axially by means of a helical groove, slot, rib, or spline.
Subclass:
217.7
Multidisc brake:
This subclass is indented under subclass 217.3. Subject
matter wherein the brake comprises at least one plate
attached to either a fixed member or the hub interposed
between two other plates fixed to the other of the fixed
member or the hub.
Subclass:
218
Motor vehicle:
This subclass is indented under subclass 215. Subject matter
including automobiles or other mechanisms for transporting
passengers or cargo wherein the power source comprises an
internal combustion engine, electric motor, or other power
plant to propel the mechanism, and wherein the brake retards
or stops movement of the mechanism.
SEE OR SEARCH CLASS:
180, Motor Vehicles, appropriate subclasses for inventions
relating to vehicle structure.
Subclass:
219
Transmission control affects brake:
This subclass is indented under subclass 218. Subject matter
wherein the device for retarding or stopping motion of the
vehicle is influenced by a controller of the device for
transmitting torque.
Subclass:
219.1
Hill-holder:
This subclass is indented under subclass 219. Subject matter
especially adapted for preventing retrograde movement of the
vehicle on an inclined surface and including means for
releasing the brake in response to manipulation of the
controller.
SEE OR SEARCH THIS CLASS, SUBCLASS:
13 for clutch-released brake holders.
Subclass:
219.2
One-way brake:
This subclass is indented under subclass 219.1. Subject
matter wherein the device for retarding or stopping rotation
of the output load is operable to prevent rotation only in a
single rotational direction.
SEE OR SEARCH CLASS:
188, Brakes, 82.1 for a one-way brake, per se.
Subclass:
219.3
Ball or roller:
This subclass is indented under subclass 219.2. Subject
matter wherein the one-way brake includes a spherical or
cylindrical member which is jammed between two surfaces, one
of which is fixed against rotation.
Subclass:
219.4
Emergency or parking brake:
This subclass is indented under subclass 219. Subject matter
including structure to hold the device for retarding or
stopping motion in an engaged condition even if the vehicle
is unattended.
Subclass:
219.5
Parking pawl:
This subclass is indented under subclass 219.4. Subject
matter wherein the device for retarding or stopping rotation
includes a pivoting projection that engages a toothed wheel.
SEE OR SEARCH CLASS:
188, Brakes, subclass 31 for a positively locking brake.
Subclass:
219.6
With separate manual operator:
This subclass is indented under subclass 219.4. Subject
matter wherein the structure to hold the brake includes an
occupant manipulatable actuator solely for applying or
releasing the brake.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, 469 for manually operated
pedals and levers for controlling transmissions or brakes.
Subclass:
219.7
Foot operated:
This subclass is indented under subclass 219.6. Subject
matter wherein the actuator is stepped on to apply and hold
the brake.
Subclass:
220
Brake control affects transmission change:
This subclass is indented under subclass 218. Subject matter
wherein the device for transmitting torque is influenced by a
controller for the device for retarding or stopping motion of
the vehicle.
Subclass:
220.1
Brake application neutralizes transmission:
This subclass is indented under subclass 220. Subject matter
wherein application of the device for retarding or stopping
motion of the vehicle causes the device for transmitting
torque to shift to a nontorque transmitting condition.
Subclass:
220.2
Park-lock device:
This subclass is indented under subclass 220. Subject matter
wherein a blocking device is provided to prevent a controller
of the torque transmitting device from being moved from a
park or neutral position unless the brake is applied.
SEE OR SEARCH CLASS:
70, Locks, 245 for ignition lock or cylinder.
477, Interrelated Power Delivery Controls, Including Engine
Control, 92 for torque transmitting controller.
Subclass:
220.3
Floor-mounted shift lever:
This subclass is indented under subclass 220.2. Subject
matter wherein the controller for the torque transmitting
device is disposed at the base of a passenger compartment of
the vehicle.
Subclass:
220.4
Solenoid operated lock:
This subclass is indented under subclass 220.3. Subject
matter wherein the blocking device comprises an
electromagnetically actuated member.
Subclass:
220.5
Rotary bushing:
This subclass is indented under subclass 220.4. Subject
matter wherein the electromagnetically actuated member causes
a cylindrical collar to be pivoted to an unblocked position.
Subclass:
220.6
Override:
This subclass is indented under subclass 220.5. Subject
matter wherein an additional manual canceling arrangement is
provided to pivot the collar to the unblocked position in the
event of failure of the electromagnetically actuated member.
Subclass:
220.7
Override:
This subclass is indented under subclass 220.4. Subject
matter wherein an additional manual canceling arrangement is
provided to pivot the collar to the unblocked position in the
event of failure of the electromagnetically actuated member.
Subclass:
221
Fluid operated:
This subclass is indented under subclass 218. Subject matter
wherein the transmission or brake is operated by a hydraulic
or pneumatic mechanism.
Subclass:
221.1
Brake and gearing at axle end:
This subclass is indented under subclass 221. Subject matter
wherein a change speed transmission and a brake device are
both disposed within the wheel hub.
Subclass:
222
Electromagnetic:
This subclass is indented under subclass 218. Subject matter
wherein the transmission or brake is operated by an electric
or magnetic mechanism.
Subclass:
223
Torque-responsive brake:
This subclass is indented under subclass 215. Subject matter
wherein the device to retard or stop rotation of the output
load is affected by the transmission of rotational energy.
(1) Note. This subclass includes a mechanism wherein the
brake is applied when the output load attempts to drive the
power source through the torque transmitting device, or is
released when the power source attempts to drive the load
through the brake.
SEE OR SEARCH THIS CLASS, SUBCLASS:
224 for belt or chain drive.
Subclass:
223.1
Transversely engaged positive brake:
This subclass is indented under subclass 223. Subject matter
wherein the device to retard or stop rotation of the output
load comprises an element that moves radially relative to an
axis of rotation of a member to be braked and includes a
portion which meshes with cooperating structure.
Subclass:
223.2
Ball or roller type brake:
This subclass is indented under subclass 223. Subject matter
wherein the device to retard or stop rotation of the output
load comprises a spherical or cylindrical member which is
jammed between two surfaces, one of which is fixed against
rotation.
Subclass:
223.3
With cam mechanism for axially moving brake member:
This subclass is indented under subclass 223. Subject matter
wherein the transmission of rotational energy causes movement
of an inclined surface relative to cooperating structure to
effect movement of a portion of a device to retard or stop
rotation of the output load which movement is parallel to an
axis of rotation of a braked member.
Subclass:
223.4
Wrap-spring brake:
This subclass is indented under subclass 223. Subject matter
wherein the device to retard or stop rotation of the output
load is a helically coiled resilient element which expands or
contracts radially to frictionally engage a member to be
braked.
Subclass:
224
Belt or chain transmission:
This subclass is indented under subclass 215. Subject matter
wherein the torque transmitting device comprises an endless
flexible band.
SEE OR SEARCH CLASS:
474, Endless Belt Power Transmission Systems or Components,
appropriate subclasses for a belt or chain transmission, per
se.
Subclass:
224.1
Belt tensioner affects brake operation:
This subclass is indented under subclass 224. Subject matter
wherein the device to retard or stop rotation of the output
load is influenced by a mechanism to adjust the tightness of
the endless flexible band.
Subclass:
224.2
Belt failure operates brake:
This subclass is indented under subclass 224. Subject matter
wherein the device to retard or stop rotation of the output
load is applied in response to breakage of the endless
flexible band or shifting of the band off of a gear or
pulley.
Subclass:
224.3
Belt shipper affects brake operation:
This subclass is indented under subclass 224. Subject matter
wherein the device to retard or stop rotation of the output
load is applied in response to moving the endless flexible
band from one pulley to another pulley.
Subclass:
225
Fluid operated:
This subclass is indented under subclass 215. Subject matter
wherein the transmission or brake is operated by a hydraulic
or pneumatic mechanism.
Subclass:
226
Electromagnetic:
This subclass is indented under subclass 215. Subject matter
wherein the transmission or brake is operated by an electric
or magnetic mechanism.
FOREIGN ART COLLECTIONS
The definition for FOR 100 below corresponds to the
definition of the abolished subclasses under Class 192 from
which these collections were formed. The definitions for FOR
101-FOR 103, FOR 106, FOR 107, and FOR 110-FOR 112 below
correspond to the definitions of the abolished subclasses
under Class 192 from which these collections were formed.
See the Foreign Art Collections schedule for specific
correspondences. {Note: The title and definitions for
indented art collections include all the details of the
one(s) that are hierarchically superior.}
Subclass: FOR 100
Devices for operating clutches by electric action.
Subclass: FOR 101
Foreign art collection for combinations for joint operation
and control of transmission and braking mechanisms..
Subclass: FOR 102
Foreign art collection for mechanism in which the brake is
applied when the transmission is impelled in the reverse
direction.
Subclass: FOR 103
Foreign art collection for mechanism in which the
transmission and brake mechanisms act on the same member,
called the "hub".
Subclass: FOR 106
Foreign art collection for mechanism in which the action of
the brake is more or less completely automatic.
Subclass: FOR 107
Foreign art collection for mechanism in which the braking
action occurs upon the failure of the driving mechanism.
Subclass: FOR 110
Foreign art collection for mechanism in which either the
transmission or brake, or both, are operated electrically.
Subclass: FOR 111
Foreign art collection for mechanism in which the
transmission element is a belt, the brake being applied upon
the shifting of the belt.
Subclass: FOR 112
Foreign art collection for mechanism in which the
transmission element is a belt, the brake being applied upon
the slackening of the driving-belt.
Information Products Division -- Contacts
Questions regarding this report should be directed to:
U.S. Patent and Trademark Office
Information Products Division
PK3- Suite 441
Washington, DC 20231
tel: (703) 306-2600
FAX: (703) 306-2737
email: oeip@uspto.gov
Last Modified: 6 October 2000