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
the subclass number
preceding each subclass definition or on the
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( please note that patents for some subclasses may not be available )
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Classification Index
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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 477
INTERRELATED POWER DELIVERY CONTROLS, INCLUDING ENGINE
CONTROL
Class Definition:
This is the class for structure wherein operation of an
engine* either regulates or is regulated by the operation of
a clutch*, a gear transmission*, or a brake*.
LINES WITH OTHER CLASSES AND WITHIN THIS CLASS
This class was formed from patents in previously existing
Classes 74 and 192 related to interrelated controls between
an engine and a transmission, clutch, or brake. Therefore
the line between this and other classes is the same as
between Class 74 and Class 192 and other classes.
REFERENCES TO OTHER CLASSES
SEE OR SEARCH CLASS:
60, Power Plants, especially subclasses 347+ and 445+ for
interrelated control between a motor and a device of Class
60.
74, Machine Element or Mechanism, for gearing, per se, and
for control for gearing lacking interrelated motor control.
123, Internal-Combustion Engines, subclasses 319+ for
devices to regulate engine speed in an internal combustion
engine.
180, Motor Vehicles, for interrelated control between an
engine and a transmission, clutch, or brake, and also
including significant vehicle structure.
188, Brakes, for brakes, per se.
192, Clutches and Power-Stop Control, for clutches and clutch
operators.
318, Electricity: Motive Power Systems, especially
subclasses 3+ for the combination of a significant
electrical motor and a load device; and see the Class
Definition, Load Device Driven By The Motor (Including Power,
Motion, Force, or Torque Transmitting Devices) for a
statement of the line between the classes.
474, Endless Belt Power Transmission Systems or Components,
for endless belt transmissions and control therefore, but
lacking interrelated motor control.
475, Planetary Gear Transmission Systems or Components, for
planetary gear transmissions and control therefore, but
lacking interrelated motor control.
476, Friction Gear Transmission Systems or Components, for
friction gear transmissions and control therefore, but
lacking interrelated motor control.
701, Data Processing: Vehicles, Navigation, and Relative
Location, subclasses 51+ for vehicle transmission control
including significant calculations but absent specific
transmission control structure.
GLOSSARY:
The following glossary will define words or phrases used in
the class and subclass definitions and are identified by an
asterisk which appears after the word, or in the instance of
a phrase, after the last word of the phrase:
BRAKE:
Mechanism operable to stop a rotatable part with respect to a
stationary part. If a brake is used as a part of
transmission (i.e., in a planetary transmission to change
gear ratio or direction), such a brake is classified with
transmission control rather than brake control.
CLUTCH:
Mechanism operable to couple two relatively rotatable parts
together for common rotation or to uncouple such parts. The
clutch* as used in the definition of this class or subclasses
is a clutch* that may be used without a gear transmission* or
in advance of or behind a gear transmission* in a power
train. If a clutch is used as a part of transmission (i.e.,
in a planetary transmission to change gear ratio or
direction), such a clutch is classified with transmission
control rather than clutch control.
ENGINE:
A primary source of rotational energy.
GEARING POWER PATH:
Mechanism including relatively rotatable bodies having
engaging surfaces or which are drivingly connected by a belt
or chain whereby a rotatable body will impart to or receive
rotary motion or power from another rotary body by rolling
contact.
GEAR TRANSMISSION:
Mechanism including at least one gearing power path*, said
mechanism being capable of changing the speed ratio* or
rotational direction between a mechanical output of an
engine* and a load*.
INPUT SHAFT:
Mechanism that receives rotational motion from an engine* and
transfers such motion to a gear transmission* or to a
clutch*.
LOAD:
Mechanism that receives rotational motion from a gear
transmission* or clutch* to do useful work.
OUTPUT SHAFT:
Mechanism that receives rotational motion from a gear
transmission* or clutch* and transfers such motion to a
load*.
SPEED RATIO:
Rotational velocity of an output shaft* divided by the
rotational velocity of an input shaft.*
SUBCLASSES
Subclass:
1
STEERING BY DRIVING:
This subclass is indented under the class definition. Subject
matter wherein a gear transmission* is provided to drive
parallel vehicle wheels at different relative speeds to
effect turning of the vehicle and such means either regulates
or is regulated by an engine*.
SEE OR SEARCH CLASS:
180, Motor Vehicles, subclass 6.2 for steering by driving
combined with significant vehicle structure.
475, Planetary Gear Transmission Systems or Components,
subclasses 18+ for gearing of that type used for steering
by driving.
Subclass:
2
PLURAL ENGINES:
This subclass is indented under the class definition. Subject
matter wherein more than one engine* is effective to regulate
or be regulated.
SEE OR SEARCH CLASS:
180, Motor Vehicles, subclass 69.6 for plural power plants
specifically arranged on a vehicle frame.
Subclass:
3
Electric engine:
This subclass is indented under subclass 2. Subject matter
wherein one of the engines* is electrically powered.
Subclass:
4
With brake control:
This subclass is indented under subclass 3. Subject matter
wherein means is provided to regulate the operation of a
brake*, and such regulation is interrelated with that of an
engine*.
Subclass:
5
With clutch control:
This subclass is indented under subclass 3. Subject matter
wherein means is provided to regulate the operation of a
clutch* and such regulation is interrelated with that of an
engine*.
Subclass:
6
With clutch control:
This subclass is indented under subclass 2. Subject matter
wherein means is provided to regulate the operation of a
clutch* and such regulation is interrelated with that of an
engine*.
Subclass:
7
ELECTRIC ENGINE:
This subclass is indented under the class definition. Subject
matter wherein the engine* is electrically powered.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3 for plural engines, one or both of which may be electric.
SEE OR SEARCH CLASS:
318, Electricity: Motive Power Systems, subclasses 9+ for
the combination of electric motor and motion or power
transmitting mechanism driven thereby. See section I,E,6, of
the main class definition of Class 318 for a statement of the
line.
Subclass:
8
With clutch control:
This subclass is indented under subclass 7. Subject matter
wherein means are provided to regulate a clutch* and such
means affects or is affected by the engine* operation.
Subclass:
9
With brake control:
This subclass is indented under subclass 8. Subject matter
wherein a means to apply a brake* is provided and such means
affects or is affected by the engine* or clutch* control.
Subclass:
10
Stopped at end of cycle:
This subclass is indented under subclass 9. Subject matter
wherein a load* device is automatically halted after a
predetermined amount of movement.
Subclass:
11
Engine stopped at end of cycle:
This subclass is indented under subclass 8. Subject matter
wherein the power to the engine* is automatically
disconnected after a predetermined amount of motion.
Subclass:
12
Common controller:
This subclass is indented under subclass 8. Subject matter
wherein the engine* and clutch* are operated by a single
actuator.
Subclass:
13
Electric clutch:
This subclass is indented under subclass 8. Subject matter
wherein the clutch* is activated by electrical means.
Subclass:
14
Speed responsive:
This subclass is indented under subclass 8. Subject matter
wherein the regulation is affected by the velocity of a
rotary part.
Subclass:
15
With transmission control:
This subclass is indented under subclass 7. Subject matter
wherein the electric engine* is connected to a load* through
a gear transmission* and the operation of the gear
transmission* regulates or is regulated by the operation of
the engine.
Subclass:
16
Load motion limit control:
This subclass is indented under subclass 15. Subject matter
wherein the regulation of the engine* or gear transmission*
takes place as the load* reaches a predetermined position.
SEE OR SEARCH THIS CLASS, SUBCLASS:
10 and 11, for limit stops including clutch control.
Subclass:
17
Transmission change by moving engine.
This subclass is indented under subclass 15. Subject matter
wherein the gear transmission* is regulated by changing the
position of the engine* with relation to its support.
Subclass:
18
Reversible engine:
This subclass is indented under subclass 15. Subject matter
wherein the regulation of the engine* includes changing the
direction of rotation of a shaft driven by the engine.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, subclass 810.1 for a
reversible motor effective to change the power path of a
transmission.
475, Planetary Gear Transmission Systems or Components,
subclass 12 for a reversible motor effective to change the
power path of a planetary transmission.
Subclass:
19
Engine starting interlock:
This subclass is indented under subclass 15. Subject matter
wherein a control for the gear transmission* regulates
starting of the engine*.
Subclass:
20
Condition responsive engine control:
This subclass is indented under subclass 15. Subject matter
wherein the operation of the engine* is regulated in response
to a variable parameter of the gear transmission* or load*.
Subclass:
21
Brake engaged when engine energy deactivated, brake
disengaged when engine energy activated:
This subclass is indented under subclass 7. Subject matter
wherein regulating means for the engine* is interrelated with
regulatory means for a brake* such that (a) when the brake*
is in a force applying position to prevent movement, the
provision of driving energy to the engine* is discontinued
and (b) when the brake* is removed from a force applying
position, driving energy to the engine* is provided.
Subclass:
22
Cam actuated brake:
This subclass is indented under subclass 21. Subject matter
wherein the regulating means for the brake* comprises
structure which converts rotational motion into translational
motion by sliding engagement with an eccentric member.
Subclass:
23
Electrically actuated brake:
This subclass is indented under subclass 21. Subject matter
wherein the regulating means for the brake* is operated by
electric current.
Subclass:
24
Brake actuation opens switch to engine:
This subclass is indented under subclass 7. Subject matter
wherein regulating means is provided to govern operation of a
brake*, and wherein movement of the brake regulating means to
a force applying position interrupts flow of electricity to
the engine.*
Subclass:
25
Electrically actuated brake:
This subclass is indented under subclass 24. Subject matter
wherein the regulating means uses electric current to move
the brake* to a force applying position.
Subclass:
26
Fluid actuated brake:
This subclass is indented under subclass 24. Subject matter
wherein the regulating means uses the force of positively or
negatively pressurized liquid or gas to move the brake* to a
force applying position.
Subclass:
27
Control means selectively operates engine energy input and
brake:
This subclass is indented under subclass 7. Subject matter
wherein a regulating means for interrelated engine* and
brake* control is operable to alternatively (a) vary an
amount of driving energy provided to the engine* or (b) move
the brake* to a force applying or release position.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, subclasses 469+ for lever
and linking systems to control a device or devices.
Subclass:
28
Fluid actuated brake:
This subclass is indented under subclass 27. Subject matter
wherein the regulating means for the brake* uses the force of
positively or negatively pressurized liquid or gas to move
the brake* to a force applying position.
Subclass:
29
Electrically actuated brake:
This subclass is indented under subclass 27. Subject matter
wherein the regulating means for the brake* uses electric
current to move the brake* to a force applying position.
Subclass:
30
GAS TURBINE ENGINE:
This subclass is indented under the class definition. Subject
matter wherein the engine* is of the type comprising a
rotatable shaft carrying blades, which shaft is caused to
rotate by the reaction on its blades of a moving gas
generated by the burning of fuel.
SEE OR SEARCH CLASS:
60, Power Plants, subclass 39.01 for gas turbine engines,
per se.
Subclass:
31
Continuously variable transmission:
This subclass is indented under subclass 30. Subject matter
wherein the gear transmission* is of a type having a
steplessly changeable speed ratio*.
Subclass:
32
WITH SUPERCHARGER:
This subclass is indented under the class definition. Subject
matter wherein the engine* is an internal combustion engine
and includes means to increase the pressure of the air supply
thereto.
Subclass:
33
Manifold pressure control:
This subclass is indented under subclass 32. Subject matter
wherein the intake pressure of the engine* is regulated or
used as a regulating signal.
Subclass:
34
TRANSMISSION CONTROL:
This subclass is indented under the class definition. Subject
matter wherein the operation of the engine* regulates or is
regulated by the operation of a gear transmission*.
Subclass:
35
Differential transmission:
This subclass is indented under subclass 34. Subject matter
wherein the gear transmission* is of the planetary-type
having at least three relatively rotatable elements, one
element constituting an input and the other two outputs, such
that a change in speed in one of the outputs has a direct
effect on the speed of the other output.
SEE OR SEARCH CLASS:
180, Motor Vehicles, subclass 197 for wheel slip control
during vehicle acceleration by reducing power to wheel; and
subclasses 248+ for four-wheel drive with differential, where
there is significant vehicle structure.
475, Planetary Gear Transmission Systems or Components, for
planetary gear transmission, per se, and particularly
subclasses 220+ for differential transmissions.
Subclass:
36
Plural outputs:
This subclass is indented under subclass 34. Subject matter
wherein the gear transmission* is effective to drive two
load* devices.
(1) Note. Included herein as separate loads are the front
and rear axle of a vehicle, as in a four wheel drive.
SEE OR SEARCH CLASS:
180, Motor Vehicles, subclasses 234+ for four-wheel drive
with significant vehicle structure.
Subclass:
37
Continuously variable friction transmission:
This subclass is indented under subclass 34. Subject matter
wherein the gear transmission* is of a type having a
steplessly changeable speed ratio* and includes toothless
gearing that transmits force by frictional contact.
Subclass:
38
With fluid drive:
This subclass is indented under subclass 37. Subject matter
wherein the continuously variable friction transmission is
combined with a hydraulic or pneumatic torque transmitting
means.
Subclass:
39
With clutch control:
This subclass is indented under subclass 37. Subject matter
wherein the continuously variable friction transmission is
combined with a means to regulate a clutch*.
Subclass:
40
With brake control:
This subclass is indented under subclass 37. Subject matter
wherein the continuously variable friction transmission is
combined with a means to regulate a brake*.
Subclass:
41
Interrelated control of diverse transmissions:
This subclass is indented under subclass 37. Subject matter
wherein the continuously variable friction transmission is
combined with a gear transmission* of a different type and
the control of one gear transmission* affects the control of
the other gear transmission*.
Subclass:
42
Constant speed output:
This subclass is indented under subclass 37. Subject matter
wherein the regulation of the engine* and gear transmission*
result in a constant velocity of the transmission output
shaft*.
SEE OR SEARCH CLASS:
180, Motor Vehicles, subclasses 170+ for cruise control in
a vehicle with significant vehicle structure.
Subclass:
43
Controlled by engine map:
This subclass is indented under subclass 37. Subject matter
wherein the gear transmission* is regulated, at least in
part, by a device providing a memory of desirable engine*
performance.
Subclass:
44
Belt-type:
This subclass is indented under subclass 37. Subject matter
wherein the continuously variable friction transmission
comprises an endless flexible band entrained about parallel
pulleys.
Subclass:
45
Fluid pressure control:
This subclass is indented under subclass 44. Subject matter
wherein the belt drive is regulated by a device operated by
pressure of a liquid or gas, and the regulation affects or is
affected by the operation of an engine*.
Subclass:
46
Ratio change controlled:
This subclass is indented under subclass 45. Subject matter
wherein the regulation of the fluid pressure is effective to
change the transmission speed ratio*.
Subclass:
47
Engine coast braking:
This subclass is indented under subclass 46. Subject matter
wherein the speed ratio* change is in response to sensing
that the load* is attempting to drive the engine*.
Subclass:
48
With electric valve control:
This subclass is indented under subclass 46. Subject matter
wherein regulation of the fluid pressure is affected by an
electrically actuated valve.
Subclass:
49
Duty ratio control:
This subclass is indented under subclass 48. Subject matter
wherein the electrical regulation is by pulse width
modulation of on-off signals to the valve.
Subclass:
50
Fluid pressure control:
This subclass is indented under subclass 37. Subject matter
wherein the steplessly variable friction transmission is
regulated by a device operated by pressure of a liquid or
gas.
Subclass:
51
Fluid resistance inhibits rotation of planetary transmission
element:
This subclass is indented under subclass 34. Subject matter
wherein either the weight or momentum of a fluid mass or a
fluids' resistance to flow is effective to retard the
rotation of an element of a planetary transmission.
(1) Note. See the definition of Class 475 for definition of
a planetary gear set.
SEE OR SEARCH CLASS:
192, Clutches and Power-Stop Control, subclass 61 for
clutches of the gear pump-type.
475, Planetary Gear Transmission Systems or Components,
subclasses 91+ for internal resistance-type clutches and
brakes combined with planetary gearing.
Subclass:
52
Including fluid drive:
This subclass is indented under subclass 34. Subject matter
wherein the combination of a hydraulic or pneumatic torque
transmitting means and a gear transmission* is interrelated
with control of the engine*.
Subclass:
53
Impeller-turbine-type:
This subclass is indented under subclass 52. Subject matter
wherein the fluid torque transmitting means is made up of at
least two rotary coaxial vaned elements forming a fluid
filled torus, one of the elements being an input element and
the other an output element.
Subclass:
54
Engine controlled:
This subclass is indented under subclass 53. Subject matter
wherein the engine* is regulated by a control signal from the
fluid torque transmitting means or the gear transmission*.
Subclass:
55
With countershaft gearing:
This subclass is indented under subclass 53. Subject matter
wherein the gear transmission* comprises intermeshing gears
on parallel shafts and wherein the axes of the shafts are
fixed.
(1) Note. This is to be distinguished from planetary
gearing wherein an axis of a planetary gear is not fixed;
but, instead, it rotates about another axis.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, subclass 718, 720, and
730.1+ for this type of transmission with a fluid drive but
without an engine control.
Subclass:
56
And turbine shaft brake:
This subclass is indented under subclass 55. Subject matter
wherein there is provided means to stop the output element of
the fluid torque transmitting means.
Subclass:
57
And clutch control:
This subclass is indented under subclass 55. Subject matter
wherein a clutch* is provided to connect the input and output
elements of the fluid torque transmitting means or connect
the input element to the gear transmission*, bypassing the
fluid torque transmitting means.
Subclass:
58
Control of or by fluid drive:
This subclass is indented under subclass 55. Subject matter
wherein the operation of the fluid torque transmitting means
is regulated or a condition thereof is effective to regulate
the gear transmission*.
SEE OR SEARCH THIS CLASS, SUBCLASS:
57 for control of the fluid drive by the regulation of a
lockup or bypass clutch.
Subclass:
59
With hydrodynamic braking:
This subclass is indented under subclass 53. Subject matter
wherein an impeller-turbine unit is utilized to retard
rotation of a load*.
SEE OR SEARCH CLASS:
475, Planetary Gear Transmission Systems or Components,
subclass 113 for impeller-turbine units used as brakes for
elements of planetary gear sets.
Subclass:
60
With nonratio brake:
This subclass is indented under subclass 53. Subject matter
wherein means is provided to stop a part of the gear
transmission* or load from rotation and such stoppage does
not directly change a gear speed ratio*.
(1) Note. A nonratio brake is one that does not directly
effect a ratio change; e.g, anticreep, parking brake,
synchronization brake, etc.
SEE OR SEARCH THIS CLASS, SUBCLASS:
59 for hydraulic brakes.
Subclass:
61
Control responsive to fluid drive:
This subclass is indented under subclass 53. Subject matter
wherein the gear transmission* is controlled by a condition
of the fluid torque transmitting means.
(1) Note. The gear transmission may be controlled, for
example, by regulating a clutch* associated with the fluid
drive, a ratio changing clutch* or brake*, or the system
pressure of the gear transmission* control system.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, subclass 731.1 for the
combination of a fluid drive and nonplanetary gearing with a
condition responsive control but no engine control.
475, Planetary Gear Transmission Systems or Components,
subclass 42, 49, and 61+ for the combination of
planetary gearing and fluid drive where a gear transmission
is controlled by a condition of the fluid drive, but
without an engine control.
Subclass:
62
With clutch control:
This subclass is indented under subclass 53. Subject matter
wherein a clutch* is operable to connect the input and output
elements of the fluid torque transmitting means or to connect
the input element thereof to the gear transmission*,
bypassing the said fluid means.
(1) Note. Where the clutch* control is responsive to a
condition of the fluid drive see subclass 61.
Subclass:
63
Disengaged during shift:
This subclass is indented under subclass 62. Subject matter
wherein the clutch* is regulated during a change in speed
ratio* of the gear transmission*.
Subclass:
64
Speed responsive:
This subclass is indented under subclass 62. Subject matter
wherein operation of the clutch* is controlled in response to
means detecting velocity or change in velocity of a part
associated therewith.
Subclass:
65
Electrical:
This subclass is indented under subclass 64. Subject matter
wherein the detecting means or control signal is operated
by electrical current.
Subclass:
66
With fluid unit vane control:
This subclass is indented under subclass 53. Subject matter
wherein means is provided to regulate the angle or position
of the vane(s) within the torus to change the speed and
direction of the fluid therein.
Subclass:
67
Fill and empty-type fluid units:
This subclass is indented under subclass 53. Subject matter
wherein the fluid torque transmitting means may be emptied or
filled for the purpose of changing the amount of slippage
between the elements.
(1) Note. These devices are often used in place of a
friction clutch*, for speed ratio* control.
SEE OR SEARCH CLASS:
475, Planetary Gear Transmission Systems or Components,
subclass 34, 42, 50, 64, and 69 for planetary gearing and
fill and empty-type fluid units in the absence of an engine
control.
Subclass:
68
Ratio control:
This subclass is indented under subclass 52. Subject matter
wherein the speed ratio of the fluid torque transmitting
means is regulated by the engine*.
SEE OR SEARCH CLASS:
60, Power Plants, subclasses 445+ for condition responsive
control of hydrostatic pump and motor units.
Subclass:
69
With planetary transmission control:
This subclass is indented under subclass 68. Subject matter
wherein there is included a gear transmission* of the
planetary type which is also regulated by the engine*.
(1) Note. See Class 475 for the definition of, and
structure involving planetary transmission, per se.
Subclass:
70
With clutch control:
This subclass is indented under subclass 34. Subject matter
wherein a means is provided to regulate a clutch* and said
regulation is interrelated with that of the engine* or gear
transmission*.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 7+ for this combination with an electric motor.
subclasses 39+ for this combination with a continuously
variable friction transmission.
57 where the gearing is of the counter shaft-type and the
clutch is associated with an impeller-turbine-type fluid
drive.
62 where the gearing is of the planetary-type and the clutch
is associated with an impeller-turbine-type fluid drive
subclasses 166+ for interrelated engine and clutch control
in the absence of a gear transmission control.
Subclass:
71
And brake control:
This subclass is indented under subclass 70. Subject matter
wherein in addition to the interrelated engine*, gear
transmission* and clutch* controls, means is provided to
regulate a brake*, and such brake regulating means affects or
is affected by at least one of the other controls.
Subclass:
72
Temperature responsive control:
This subclass is indented under subclass 71. Subject matter
wherein the heat level of or surrounding the engine*, gear
transmission*, clutch*, or brake* is effective as a control
signal.
SEE OR SEARCH THIS CLASS, SUBCLASS:
76 for temperature responsive control involving only engine,
clutch, and gear transmission control.
98 for temperature control involving only engine and gear
transmission control.
SEE OR SEARCH CLASS:
475, Planetary Gear Transmission Systems or Components,
subclass 117 for temperature responsive control of a
planetary transmission.
Subclass:
73
Engine controlled:
This subclass is indented under subclass 71. Subject matter
wherein the clutch*, brake*, or gear transmission* regulate
operation of the engine*.
Subclass:
74
Clutch controlled:
This subclass is indented under subclass 71. Subject matter
wherein the engine*, gear transmission*, or brake* regulate
the operation of the clutch*.
Subclass:
75
Gearing controlled:
This subclass is indented under subclass 71. Subject matter
wherein the engine*, clutch*, or brake* regulates the
operation of the gear transmission*.
Subclass:
76
Temperature responsive control:
This subclass is indented under subclass 70. Subject matter
wherein means are provided to sense a heat level and
means responsive to such sensing are provided to regulate
the operation of the engine*, gear transmission*, or
clutch*.
SEE OR SEARCH THIS CLASS, SUBCLASS:
72 for temperature responsive control involving an engine,
gear transmission, clutch, and brake.
98 for temperature responsive control involving only an
engine and gear transmission.
SEE OR SEARCH CLASS:
475, Planetary Gear Transmission System or Components,
subclass 117 for temperature responsive control of a
planetary gear transmission.
Subclass:
77
Clutch, engine, and transmission controlled:
This subclass is indented under subclass 70. Subject matter
wherein means are provided to regulate the operation of a
clutch*, an engine*, and a gear transmission*.
Subclass:
78
Electronic digital control:
This subclass is indented under subclass 77. Subject matter
wherein the operation is regulated with the use of a digital
computer.
SEE OR SEARCH CLASS:
701, Data Processing: Vehicles, Navigation, and Relative
Location, subclasses 51+ for vehicle transmission control
including significant calculations but absent specific
transmission structure.
Subclass:
79
Clutch and transmission controlled:
This subclass is indented under subclass 70. Subject matter
wherein the engine* control regulates the operation of a
clutch* and a gear transmission*.
Subclass:
80
Speed responsive control:
This subclass is indented under subclass 79. Subject matter
wherein the regulation is affected by the velocity of a
rotary part.
Subclass:
81
With manual override:
This subclass is indented under subclass 80. Subject matter
wherein the speed responsive control may be negated by manual
means.
Subclass:
82
Vacuum actuated clutch:
This subclass is indented under subclass 80. Subject matter
wherein the clutch* is operated by a source of negative
pressure.
Subclass:
83
Clutch and engine controlled:
This subclass is indented under subclass 70. Subject matter
wherein the gear transmission* control regulates the
operation of a clutch* and an engine*.
Subclass:
84
Speed responsive control:
This subclass is indented under subclass 83. Subject matter
wherein the regulation is affected by the velocity of a
rotary part.
Subclass:
85
Plural speed signals:
This subclass is indented under subclass 84. Subject matter
wherein the regulation is affected by the velocities of more
than one rotary part.
Subclass:
86
Clutch controlled:
This subclass is indented under subclass 70. Subject matter
wherein operation of the engine* or gear transmission*
regulates the operation of a clutch*.
Subclass:
87
Electric clutch:
This subclass is indented under subclass 86. Subject matter
wherein the clutch* is actuated by electrical means.
Subclass:
88
Vacuum actuated clutch:
This subclass is indented under subclass 86. Subject matter
wherein the clutch* is actuated by a source of negative
pressure.
Subclass:
89
Electric control:
This subclass is indented under subclass 88. Subject matter
wherein the negative pressure is controlled by electrical
means.
Subclass:
90
Engine controlled:
This subclass is indented under subclass 70. Subject matter
wherein operation of the clutch* or gear transmission*
regulates the operation of an engine*.
SEE OR SEARCH THIS CLASS, SUBCLASS:
54 for a gear transmission and impeller-turbine-type fluid
unit controlling an engine.
73 for the combination of a gear transmission, clutch, and
brake controlling an engine.
101 for engine ignition control.
107 for engine control by a transmission, absent a clutch or
brake.
Subclass:
91
Speed responsive:
This subclass is indented under subclass 90. Subject matter
wherein the operation of the engine* is regulated by the
velocity of a rotary part.
Subclass:
92
With brake control:
This subclass is indented under subclass 34. Subject matter
wherein means are provided to regulate a brake* and operation
of said brake regulating mean is interrelated with the
operation of the engine* or gear transmission*.
Subclass:
93
Anticreep:
This subclass is indented under subclass 92. Subject matter
wherein, in a vehicle drive, means are provided to prevent
the vehicle from moving forward when the engine* is at idle
and the vehicle is stopped.
SEE OR SEARCH THIS CLASS, SUBCLASS:
114 for anticreep devices including only engine and
transmission control.
Subclass:
94
Brake controls transmission:
This subclass is indented under subclass 92. Subject matter
wherein the means to regulate the brake* affect the operation
of the gear transmission*.
Subclass:
95
Pressure controlled:
This subclass is indented under subclass 94. Subject matter
wherein the gear transmission* is controlled by fluid and the
means to or regulate the brake* affects the force exerted by
the fluid.
Subclass:
96
One control blocks another:
This subclass is indented under subclass 92. Subject matter
wherein the operation of either the engine*, gear
transmission*, or brake* is prevented by the operation of one
of the others.
SEE OR SEARCH THIS CLASS, SUBCLASS:
125 where only engine and transmission controls are
involved.
Subclass:
97
Control by sensed ambient condition, pattern indicia, or
external signal:
This subclass is indented under subclass 34. Subject matter
wherein means are provided to sense (1) a condition or change
in condition of the atmosphere surrounding the engine or gear
transmission* or (2) the presence or absence of indicative
means on a prescribed record or (3) a signal from a source
not physically connected to the engine*, gear transmission*
or load* or (4) the heat level of a part of the engine or
gear transmission*; and, in response to the sensing, regulate
the operation of the engine* or gear transmission*.
Subclass:
98
Temperature control:
This subclass is indented under subclass 97. Subject matter
wherein means are provided to sense a heat level, and means
responsive to such sensing regulates the operation of the
engine* or gear transmission*.
SEE OR SEARCH THIS CLASS, SUBCLASS:
72 for other temperature responsive controls and see the
search notes thereunder.
Subclass:
99
Engine starting interlock:
This subclass is indented under subclass 34. Subject matter
wherein the gear transmission* control regulates starting of
the engine*.
SEE OR SEARCH THIS CLASS, SUBCLASS:
19 for starting interlocks with electric motors.
SEE OR SEARCH CLASS:
180, Motor Vehicles, subclasses 271+ for interlocks with
significant vehicle structure.
Subclass:
100
Exhaust emission control:
This subclass is indented under subclass 34. Subject matter
wherein the engine* is an internal combustion engine and
regulation of the engine* includes means to regulate the
discharge of undesirable engine waste gas constituents.
SEE OR SEARCH CLASS:
60, Power Plants, subclasses 272+ for an internal
combustion engine with treatment or handling of exhaust gas.
123, Internal-Combustion Engines, appropriate subclasses for
engine emission control in the absence of a gear
transmission.
Subclass:
101
Engine ignition control for transmission change:
This subclass is indented under subclass 34. Subject matter
wherein the engine* is of a type requiring periodic ignition
for continued operation and the means to regulate the
operation of the engine includes means to regulate or
interrupt the periodic ignition to enable a gear
transmission* speed ratio* change.
Subclass:
102
Ignition advanced or retarded:
This subclass is indented under subclass 101. Subject matter
wherein the ignition takes place at a particular time with
respect to the operation of the engine* parts and the
regulation of the engine* includes regulation of the ignition
timing.
Subclass:
103
Ignition intermitting and safety means limiting duration of
intermission:
This subclass is indented under subclass 101. Subject matter
wherein the ignition is interrupted for a predetermined time
regardless of whether the speed ratio* change is completed or
not.
Subclass:
104
Ignition intermitting controlled by manifold pressure:
This subclass is indented under subclass 101. Subject matter
wherein the engine* is an air breathing engine* and means are
provided to sense the pressure at the intake of the engine
and in response thereto regulate the interruption of the
periodic ignition.
Subclass:
105
Ignition intermitting initiated by positioning accelerator:
This subclass is indented under subclass 101. Subject matter
wherein the interruption of the ignition is initiated by
placing a manual control for energy input to the engine* in a
predetermined position.
Subclass:
106
Initiation inhibited by sensed condition:
This subclass is indented under subclass 105. Subject matter
wherein means is provided to sense a condition or change in
condition and in response thereto prevent the manual control
from initiating the interruption of the ignition.
Subclass:
107
Engine controlled by transmission:
This subclass is indented under subclass 34. Subject matter
wherein means is provided to regulate a supply of energy to
the engine* and such regulation is affected by the operation
of the gear transmission*.
Subclass:
108
Constant output shaft speed:
This subclass is indented under subclass 107. Subject matter
wherein the engine* is regulated such that a load* shaft of
the gear transmission* remains at an unchanging velocity.
SEE OR SEARCH THIS CLASS, SUBCLASS:
123 Internal Combustion Engines, subclasses 319+ for engine
speed regulation without transmission control.
180 Motor Vehicles, subclasses 170+ for cruise control
involving significant vehicle structure or lacking
transmission control.
Subclass:
109
Diminution during transmission change:
This subclass is indented under subclass 107. Subject matter
wherein energy input supplied to the engine* is modified by
decreasing the supply while the gear transmission* speed
ratio* is being changed.
Subclass:
110
Responsive to transmission output condition:
This subclass is indented under subclass 107. Subject matter
wherein energy input supplied to the engine is regulated by a
condition or change of condition of an output shaft* of the
gear transmission*.
Subclass:
111
Transmission setting contingent:
This subclass is indented under subclass 107. Subject matter
wherein means are provided to sense the selection of a
particular gear transmission* speed ratio*, and, in response
to such sensing, means are provided to affect the energy
input supplied to the engine*.
Subclass:
112
Change to neutral idles engine:
This subclass is indented under subclass 111. Subject matter
wherein the means to sense the selection is capable of
disengaging all speed ratios*, and, in response thereto, is
effective to decrease energy input to the engine* to a
minimum while allowing the engine* to continue operating.
Subclass:
113
Engine input variable in neutral:
This subclass is indented under subclass 112. Subject matter
wherein energy supply to the engine* is changeable while all
gear speed ratios* are disengaged.
Subclass:
114
Anticreep:
This subclass is indented under subclass 34. Subject matter
wherein in a vehicle drive, means are provided to prevent the
vehicle from moving forward when the engine is at idle and
the vehicle is stopped.
SEE OR SEARCH THIS CLASS, SUBCLASS:
93 wherein in addition to an engine and gear transmission, a
brake is involved.
Subclass:
115
Transmission controlled by engine:
This subclass is indented under subclass 34. Subject matter
wherein the operation of the gear transmission* is regulated
by the operation of the engine*.
Subclass:
116
Shift from neutral shock control:
This subclass is indented under subclass 115. Subject matter
wherein a manual means is movable to a first position to
effect engagement of a speed ratio* of the gear
transmission* or to a second position to effect
disengagement of all ratios and wherein means is provided to
limit impulsive forces within the gear transmission* when the
gear transmission* is shifted between first and second
positions.
Subclass:
117
Pressure controlled:
This subclass is indented under subclass 116. Subject matter
wherein the gear transmission* is regulated by pumped fluid
and the said shift affects the force exerted by the fluid.
Subclass:
118
Engine (coast) braking:
This subclass is indented under subclass 115. Subject matter
wherein a speed ratio* change is controlled in response to
sensing that the load* is attempting to drive the engine.
SEE OR SEARCH THIS CLASS, SUBCLASS:
47 for engine braking with a belt transmission.
Subclass:
119
Electric valve control:
This subclass is indented under subclass 118. Subject matter
wherein the speed ratio* change is controlled by an
electrically operated valve.
Subclass:
120
By acceleration:
This subclass is indented under subclass 115. Subject matter
wherein means for the regulation of the gear transmission*
includes a signal responsive to the rate of change of
velocity with respect to time of a gear transmission* part or
a load* driven thereby.
Subclass:
121
By input manifold pressure or engine fuel control:
This subclass is indented under subclass 115. Subject matter
wherein the engine* is an air breathing, fuel burning type
and the gear transmission* is regulated by air pressure at
the intake of the engine or by a means to feed the fuel.
Subclass:
122
Selector-type:
This subclass is indented under subclass 121. Subject matter
wherein a manual means is provided to choose a gear speed
ratio* of the gear transmission* but the change to said ratio
is not effected until a manual control for fuel to the
engine* is placed in a particular position.
SEE OR SEARCH THIS CLASS, SUBCLASS:
133 136 and 141, for forced downshifts by placing the fuel
control in a particular position and not preceded by a
preselection of gear ratio.
Subclass:
123
With positive shift means:
This subclass is indented under subclass 121. Subject matter
wherein the gear transmission* uses toothed positively
engaging elements to change from one speed ratio* to another,
and including the sliding of a gear on a shaft to effect
ratio change.
Subclass:
124
With synchronization:
This subclass is indented under subclass 123. Subject matter
wherein means are provided to equalize the speed of the parts
of the engaging elements before they are engaged.
Subclass:
125
Prevents unsafe or unintentional shift:
This subclass is indented under subclass 121. Subject matter
wherein means are provided to prohibit the changing of the
speed ratio* of the gear transmission* when such change may
harm the engine* or gear transmission.
Subclass:
126
Reverse inhibitor:
This subclass is indented under subclass 125. Subject matter
wherein the speed ratio* change that is prohibited is that
which would change the direction of rotation of a gear
transmission* load* shaft.
Subclass:
127
Shift valve control:
This subclass is indented under subclass 121. Subject matter
wherein a reciprocating valve is effective to trigger the
actuation of a speed ratio* change in the gear transmission*
said valve being regulated by a signal responsive to the
input manifold pressure or engine fuel control.
(1) Note. Usually the valve is controlled by both an engine
signal and vehicle speed responsive signal.
Subclass:
128
Hysteresis:
This subclass is indented under subclass 127. Subject matter
wherein the regulation of the valve is such that should a
given signal level be necessary to move the valve in one
direction, movement in a second direction must overcome a
greater signal level.
(1) Note. This prevents "hunting" by the valve.
Subclass:
129
Electric control:
This subclass is indented under subclass 128. Subject matter
wherein a signal used to regulate the valve is electric.
Subclass:
130
Plural shift valves:
This subclass is indented under subclass 127. Subject matter
wherein two valves are regulated by signals responsive to
input manifold pressure or engine* fuel control to trigger
actuation of two speed ratio* changes.
Subclass:
131
Electric control:
This subclass is indented under subclass 130. Subject matter
wherein the signal is electric.
SEE OR SEARCH CLASS:
701, Data Processing: Vehicles, Navigation, and Relative
Location, subclasses 51+ for vehicle transmission control
including significant calculations but absent specific
transmission structures.
Subclass:
132
Downshift control:
This subclass is indented under subclass 131. Subject matter
wherein significance is attributed to means for changing from
a high speed ratio* to a lower speed ratio*.
Subclass:
133
Kickdown:
This subclass is indented under subclass 132. Subject matter
wherein a forced downshift is effected by moving a manual
engine* fuel control to a predetermined position.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 101+ wherein addition to the downshift the
periodic ignition is interrupted.
122 for the manual selection of gear ratio followed by
actuation thereof by placement of a fuel control.
136 and 141, for other kickdown combinations.
Subclass:
134
Selector valve overrule:
This subclass is indented under subclass 131. Subject matter
wherein significance is attributed to a manual valve movable
to choose various gear speed ratios* of the gear
transmission* and movable to a predetermined position to
prevent normal operation of a shift valve.
Subclass:
135
Downshift control:
This subclass is indented under subclass 130. Subject matter
wherein significance is attributed to means for changing from
a high speed ratio* to a lower speed ratio*.
Subclass:
136
Kickdown:
This subclass is indented under subclass 135. Subject matter
wherein a forced downshift is effected by moving a manual
engine* fuel control to a predetermined position.
(1) Note. See subclass 133 and the notes thereunder for
other accelerator triggered controls.
Subclass:
137
Selector valve overrule:
This subclass is indented under subclass 130. Subject matter
wherein significance is attributed to a manual valve movable
to choose various gear speed ratios* of the gear
transmission* and movable to a predetermined position to
prevent normal operation of a shift valve.
Subclass:
138
Electric control:
This subclass is indented under subclass 127. Subject matter
wherein the signal is electric.
SEE OR SEARCH CLASS:
701, Data Processing: Vehicles, Navigation, and Relative
Location, subclasses 51+ for vehicle transmission control
including significant calculations but absent specific
transmission structure.
Subclass:
139
Downshift control:
This subclass is indented under subclass 138. Subject matter
wherein significance is attributed to means for changing from
a high speed ratio* to a lower speed ratio*.
Subclass:
140
Downshift control:
This subclass is indented under subclass 127. Subject matter
wherein significance is attributed to means for changing from
a high speed ratio* to a lower speed ratio*.
Subclass:
141
Kickdown:
This subclass is indented under subclass 140. Subject matter
wherein a forced downshift is effected by moving a manual
engine* fuel control to a predetermined position.
(1) Note. See subclass 133 and the notes thereunder for
other accelerator triggered controls.
Subclass:
142
Selector valve overrule:
This subclass is indented under subclass 127. Subject matter
wherein significance is attributed to a manual valve movable
to choose various gear speed ratios* of the gear
transmission* and movable to a predetermined position to
prevent normal operation of a shift valve.
Subclass:
143
Servomotor timing:
This subclass is indented under subclass 121. Subject matter
wherein a speed ratio* of the gear transmission* is engaged
by a fluid actuated piston forming a movable wall of a
chamber and means is provided to regulate the buildup or
release of fluid pressure in one or more of such chambers.
Subclass:
144
Downshift:
This subclass is indented under subclass 143. Subject matter
wherein significance is attributed to regulating pressure in
the chamber on a shift from a high speed ratio* to a lower
speed ratio*.
Subclass:
145
With fluid accumulator:
This subclass is indented under subclass 144. Subject matter
wherein a variable enclosed space is placed in communication
with the chamber to control the buildup or release of fluid
in such chamber.
(1) Note. Included under this definition are "trimmer"
valves which exhaust pressure in a fluid line until pressure
builds up in an adjoining chamber and shuts off the exhaust.
SEE OR SEARCH CLASS:
138, Pipes And Tubular Conduits, subclasses 30+ for
accumulators, per se.
475, Planetary Gear Transmission Systems or Components,
subclass 129 for accumulator control of planetary gearing
without an engine control.
Subclass:
146
Electric valve control:
This subclass is indented under subclass 145. Subject matter
wherein control of fluid to or from said chamber is by means
of an electrically operated valve.
SEE OR SEARCH CLASS:
701, Data Processing: Vehicles, Navigation, and Relative
Location, subclasses 51+ for vehicle transmission control
including significant calculations but absent specific
transmission structure.
Subclass:
147
Double acting servo:
This subclass is indented under subclass 144. Subject matter
wherein the piston is actuated by fluid pressure to engage a
gear speed ratio* and is also actuated by fluid pressure to
disengage the said ratio.
Subclass:
148
Speed responsive control:
This subclass is indented under subclass 144. Subject matter
wherein the regulation of buildup or release of fluid
pressure is controlled by the velocity of a gear
transmission* part.
Subclass:
149
Electric valve control:
This subclass is indented under subclass 144. Subject matter
wherein control of fluid pressure to or from said chamber is
by means of an electrically operated valve.
SEE OR SEARCH CLASS:
701, Data Processing: Vehicles, Navigation, and Relative
Location, subclasses 51+ for vehicle transmission control
including significant calculations but absent specific
transmission structure.
Subclass:
150
With fluid accumulator:
This subclass is indented under subclass 143. Subject matter
wherein a variable enclosed space is placed in communication
with the chamber to control the buildup or release of fluid
in such chamber.
(1) Note. Included under this definition are "trimmer"
valves which exhaust pressure in a fluid line until pressure
builds up in an adjoining chamber and shuts off the exhaust.
SEE OR SEARCH THIS CLASS, SUBCLASS:
145 for fluid accumulators associated with a downshift
control.
SEE OR SEARCH CLASS:
138, Pipes and Tubular Conduits, subclasses 30+ for
accumulators, per se.
475, Planetary Gear Transmission Systems or Components,
subclass 129 for accumulator control of planetary gearing
without an engine control.
Subclass:
151
Engine parameter controls back pressure:
This subclass is indented under subclass 150. Subject matter
wherein a movable piston functions to vary the capacity of
the accumulator space, and a signal representing input
manifold pressure or engine* fuel control biases the piston
to change the resistance to movement of the piston.
Subclass:
152
Electric valve control:
This subclass is indented under subclass 150. Subject matter
wherein control of fluid to or from said chamber is by means
of an electrically operated valve.
SEE OR SEARCH CLASS:
701, Data Processing: Vehicles, Navigation, and Relative
Location, subclasses 51+ for vehicle transmission control
including significant calculations but absent specific
transmission structure.
Subclass:
153
Double acting servo:
This subclass is indented under subclass 143. Subject matter
wherein the piston is actuated by fluid pressure to engage a
gear speed ratio* and is also actuated by fluid pressure to
disengage the said ratio.
Subclass:
154
Speed responsive control:
This subclass is indented under subclass 143. Subject matter
wherein the regulation of buildup or release of fluid
pressure is controlled by the velocity of a gear
transmission* part.
Subclass:
155
Electric valve control:
This subclass is indented under subclass 143. Subject matter
wherein control of fluid pressure to or from the chamber is
by means of an electrically operated valve.
SEE OR SEARCH CLASS:
701, Data Processing: Vehicles, Navigation, and Relative
Location, subclasses 51+ for vehicle transmission control
including significant calculations but absent specific
transmission structure.
Subclass:
156
Transmission pressure controlled:
This subclass is indented under subclass 121. Subject matter
wherein the gear transmission* is controlled by fluid
pressure which is regulated by engine* intake pressure or
means to feed the fuel.
Subclass:
157
Variable capacity pump:
This subclass is indented under subclass 156. Subject matter
wherein a pump is the source of fluid pressure and the
engine* intake pressure or fuel feed is effective to control
the volumetric capacity of said pump.
Subclass:
158
Line pressure controlled:
This subclass is indented under subclass 156. Subject matter
wherein a pump is the source of fluid pressure and feeds
fluid to a valve effective to regulate said pressure in
response to engine* intake pressure or fuel feed.
Subclass:
159
Responsive to speed:
This subclass is indented under subclass 158. Subject matter
wherein the valve is also influenced by the velocity of a
gear transmission* part.
Subclass:
160
Electric valve control:
This subclass is indented under subclass 159. Subject matter
wherein the engine* intake pressure, fuel feed or velocity
signal is an electric signal.
Subclass:
161
Duty ratio control:
This subclass is indented under subclass 160. Subject matter
wherein the electric signal is variable and effective to
variably regulate a fluid pressure by pulse width modulation
of on-off signals to the valve.
Subclass:
162
Transmission setting contingent:
This subclass is indented under subclass 158. Subject matter
wherein the valve is also influenced by means sensing the
particular gear speed ratio* engaged at that time.
Subclass:
163
Electric valve control:
This subclass is indented under subclass 158. Subject matter
wherein the engine* intake pressure or fuel feed signal is an
electric signal.
Subclass:
164
Electric valve control:
This subclass is indented under subclass 156. Subject matter
wherein the engine intake pressure or fuel feed signal is
an electric signal.
Subclass:
165
Engine control linkage mounted on manual gearshift lever:
This subclass is indented under subclass 34. Subject matter
wherein a manual lever is utilized to regulate operation of a
gear transmission* and the lever supports means movable
relative thereto which means is operative to regulate an
engine*.
Subclass:
166
CLUTCH CONTROL:
This subclass is indented under the class definition. Subject
matter wherein the operation of the engine* regulates or is
regulated by the operation of a clutch*.
SEE OR SEARCH THIS CLASS, SUBCLASS:
5 and 6, for a clutch control in combination with plural
engines.
subclasses 8+ for clutch control in combination with an
electric engine.
39 for clutch control in combination with a continuously
variable friction transmission.
57 and 62+, for clutch control in combination with a fluid
drive and transmission.
subclasses 70+ for clutch control in combination with
transmission control.
Subclass:
167
With starter:
This subclass is indented under subclass 166. Subject matter
wherein an engine* starting device is interrelated with the
clutch* operation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
99 for engine starting interlocked with transmission
control.
Subclass:
168
With fluid drive:
This subclass is indented under subclass 166. Subject matter
wherein a hydraulic or pneumatic torque transmitting means is
interrelated with clutch* control.
SEE OR SEARCH THIS CLASS, SUBCLASS:
57 for clutch control interrelated with impeller-turbine
fluid drive and countershaft gearing.
62 for clutch control interrelated with impeller-turbine
fluid drive and transmission.
Subclass:
169
Speed responsive control:
This subclass is indented under subclass 168. Subject matter
wherein the clutch control is responsive to a signal derived
from the velocity of a moving part.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 64+ for speed responsive clutch control in an
impeller-turbine fluid drive in combination with a
transmission.
Subclass:
170
With brake control:
This subclass is indented under subclass 166. Subject matter
wherein a brake* control is interrelated with clutch* and
engine* control.
SEE OR SEARCH THIS CLASS, SUBCLASS:
71 for brake control is combination with transmission and
clutch control.
Subclass:
171
Clutch controlled:
This subclass is indented under subclass 170. Subject matter
wherein means to control the clutch* is interrelated with the
brake* control.
SEE OR SEARCH THIS CLASS, SUBCLASS:
74 for brake control in combination with clutch and
transmission control wherein the clutch is the controlled
element.
Subclass:
172
And brake controlled:
This subclass is indented under subclass 171. Subject matter
wherein means are provided to control both the clutch* and
the brake*.
Subclass:
173
Engine controlled:
This subclass is indented under subclass 170. Subject matter
wherein means are provided to control the engine* and such
means is interrelated with clutch* and brake* control.
SEE OR SEARCH THIS CLASS, SUBCLASS:
73 for brake control in combination with a transmission and
clutch control wherein the engine is controlled.
Subclass:
174
Condition responsive control:
This subclass is indented under subclass 166. Subject matter
wherein the clutch* control is subject to an additional
variable parameter.
Subclass:
175
Speed responsive:
This subclass is indented under subclass 174. Subject matter
wherein the variable parameter is the velocity of a moving
part.
Subclass:
176
Slip rate control:
This subclass is indented under subclass 175. Subject matter
wherein a speed differential between parts of a clutch* is
regulated.
Subclass:
177
Overload release:
This subclass is indented under subclass 174. Subject matter
wherein the additional parameter is torque experienced by the
load*, and the clutch is disengaged when the torque exceeds a
predetermined valve.
Subclass:
178
Engine shut off:
This subclass is indented under subclass 177. Subject matter
wherein motive power to the engine* is terminated upon
disengagement of the clutch*.
Subclass:
179
Electric clutch:
This subclass is indented under subclass 166. Subject matter
wherein the clutch is actuated by electrical current.
Subclass:
180
Regulated clutch engagement:
This subclass is indented under subclass 166. Subject matter
wherein significant is attributed to timing of movement of
clutch* element during engagement.
Subclass:
181
Engine controlled by clutch control:
This subclass is indented under subclass 166. Subject matter
wherein operation of the clutch* regulates operation of the
engine*
Subclass:
182
BRAKE CONTROL:
This subclass is indented under the class definition. Subject
matter wherein operation of the engine* regulates or is
regulated by the operation of a brake*.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 2+ for brake control in combination with plural
engines.
subclasses 7+ for brake control in combination with an
electric engine.
40 for brake control in combination with a continuously
variable friction transmission.
subclasses 52+ for brake control in combination with a
fluid drive and transmission.
subclasses 71+ for combined transmission, brake, and clutch
control.
subclasses 92+ for combined transmission and brake
control.
subclasses 170+ for combined clutch and brake control.
Subclass:
183
Sensed condition responsive control of engine or brake:
This subclass is indented under subclass 182. Subject matter
including means to detect a parameter or change in a
parameter and having means responsive thereto to regulate
operation of the engine* or brake*.
Subclass:
184
Brake:
This subclass is indented under subclass 183. Subject matter
wherein operation of the brake* is regulated.
Subclass:
185
And engine:
This subclass is indented under subclass 184. Subject matter
wherein operation of the engine* is also regulated.
Subclass:
186
Speed or acceleration responsive:
This subclass is indented under subclass 184. Subject matter
wherein the parameter is velocity or rate of change of
velocity of a moving part.
SEE OR SEARCH CLASS:
188, Brakes, subclasses 180+ for speed responsive brake
operators.
303, Fluid-Pressure and Analogous Brake System, subclasses
121+ for brakes regulated by a speed condition.
Subclass:
187
Speed or accelerations responsive:
This subclass is indented under subclass 183. Subject matter
wherein the parameter is velocity or rate of change of
velocity of a moving part.
SEE OR SEARCH THIS CLASS, SUBCLASS:
186 for interrelated engine and brake control wherein the
brake is controlled in responsive to speed or acceleration,
and see the search notes thereunder.
Subclass:
188
Plural diverse brake means:
This subclass is indented under subclass 182. Subject matter
including at least two operationally different and distinct
brakes*, each having a regulation means, and at least one of
the brake regulating means is interrelated with regulating
means for the engine*.
Subclass:
189
Engine energy control having adjusting and holding device,
with means on brake control to override holding device:
This subclass is indented under subclass 182. Subject matter
wherein engine* regulating means is operable to govern the
energy input to the engine* and includes mechanism to set and
lock the engine regulating means at a desired position;
combined with apparatus to disengage the setting and locking
mechanism simultaneously with activation of the brake*.
Subclass:
190
Holding device engaged by electric means:
This subclass is indented under subclass 189. Subject matter
wherein the setting and locking mechanism is actuated by a
structure using electric current.
Subclass:
191
Magnetic holding device:
This subclass is indented under subclass 190. Subject matter
wherein a magnetic attracting force is used to prevent
movement of the engine* regulating means.
Subclass:
192
Mechanical holding device engaged by mechanical means:
This subclass is indented under subclass 189. Subject matter
wherein the setting and locking mechanism includes structure
to lock the engine* regulating means against movement and
further includes a device to actuate the locking structure;
wherein said structure and device is operated by force other
than fluid pressure.
Subclass:
193
Device or means including a threaded shaft, rack, or
ratchet:
This subclass is indented under subclass 192. Subject matter
wherein said structure or device comprises (a) a cylindrical
bar with a continuous helical rib projecting from the
external surface which is engaged by interfitting projections
on a member for transferring force, (b) a bar with notch or
teeth projecting transversely from a longitudinal surface
which is engaged by interfitting projections on a member for
transferring force, or (c) a unidirectionally rotatable force
transmitting member.
Subclass:
194
Brake control having holding device, with means on engine
control to override holding device:
This subclass is indented under subclass 182. Subject matter
wherein regulating means for the brake* includes mechanism to
set and lock the brake regulating means at a desired
position; combined with apparatus to disengage the setting
and locking mechanism simultaneously with regulation of the
engine*.
Subclass:
195
Holding device responsive to motion, speed, or acceleration:
This subclass is indented under subclass 194. Subject matter
including means to detect movement, velocity or rate of
change of velocity, and having an actuator responsive to such
detection to effect operation of the locking mechanism.
Subclass:
196
Holding device comprising brake valve operated by solenoid:
This subclass is indented under subclass 195. Subject matter
wherein the brake* is regulated by fluid under pressure
flowing through a passage, and the locking mechanism
comprises a fluid restricting device within the passage
movable between open, shut, or partially open positions by
structure comprising a ferrous core moved longitudinally
inside a cylindrical coil of wire by magnetic force generated
by flow of electric current in the wire.
Subclass:
197
Holding device engaged by electric means:
This subclass is indented under subclass 194. Subject matter
comprising structure using electric current to actuate the
locking mechanism.
Subclass:
198
Holding device comprising brake valve operated by solenoid:
This subclass is indented under subclass 197. Subject matter
wherein the brake* is regulated by fluid under pressure
flowing through a passage, and the locking mechanism
comprises a fluid restricting device within the passage
movable between open, shut, or partially open positions by
structure comprising a ferrous core moved longitudinally
inside a cylindrical coil of wire by magnetic force generated
by flow of electric current in the wire.
Subclass:
199
Brake engaged when engine energy deactivated, brake
disengaged when engine energy activated:
This subclass is indented under subclass 182. Subject matter
wherein regulating means for the engine* is interrelated with
regulating means for the brake* such that (a) when the brake*
is in a force applying position to prevent movement, the
provision of driving energy to the engine* is discontinued
and (b) when the brake* is removed from a force applying
position, driving energy to the engine* is provided.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 21+ when the engine is an electric motor.
Subclass:
200
Internal combustion engine:
This subclass is indented under subclass 199. Subject matter
wherein the driving energy for the engine* is a combustible
material which is burned to expand within a combustion
chamber to drive a piston in the chamber.
Subclass:
201
Controls brake valve:
This subclass is indented under subclass 200. Subject matter
wherein the regulating means for the brake* moves the brake*
into an operating position by the action of fluid flowing
through a passage, and the regulating means of the engine*
operates a fluid restricting device in the passage between
open, shut, and partially open positions.
Subclass:
202
Vacuum actuated brake:
This subclass is indented under subclass 201. Subject matter
wherein the fluid within the passage is at a lower pressure
than the environment so that as pressure is selectively
removed therefrom environmental pressure moves the brake*
into a force applying position.
Subclass:
203
Brake condition change modifies engine condition:
This subclass is indented under subclass 182. Subject matter
wherein a variation of a characteristic of the brake*
regulates the engine*.
Subclass:
204
Brake actuation interrupts ignition circuit of fluid engine:
This subclass is indented under subclass 203. Subject matter
wherein the engine* is of a type requiring periodic ignition
of a fluid by flow of electric current, and wherein movement
of the brake* to a force applying position produces a
discontinuity in the flow of electric current.
SEE OR SEARCH THIS CLASS, SUBCLASS:
subclasses 101+ for engine ignition control for
transmission charge.
Subclass:
205
Brake actuation decreases or eliminates fluid energy input to
engine:
This subclass is indented under subclass 203. Subject matter
wherein the engine* is driven by fluid energy, and wherein
movement of the brake* into a force applying position causes
engine* regulating means to reduce or exclude the quantity of
driving fluid supplied to the engine.
Subclass:
206
By closing throttle valve:
This subclass is indented under subclass 205. Subject matter
wherein the regulating means of the engine* includes a drive
fluid passage having a restrictor operable between open,
shut, or partially open positions, and wherein movement of an
element of the brake*moves the restrict or from an open to a
shut or partially open position.
Subclass:
207
By preventing increasing operation of engine energy control:
This subclass is indented under subclass 205. Subject matter
wherein the engine* regulating means increases or decreases
the quantity of driving fluid to the engine*, and wherein
actuation of the brake* prohibits the engine regulating means
from increasing the quantity of driving fluid supplied to the
engine.
Subclass:
208
Decreasing fluid energy input to engine actuates brake:
This subclass is indented under subclass 182. Subject matter
wherein the engine* is driven by fluid energy and wherein
engine regulating means varies the quantity of driving fluid
passing to the engine*, and wherein operation of the
regulating means to reduce the quantity of driving fluid to
the engine also moves the brake* into a force applying
position.
Subclass:
209
Control means selectively operates engine energy input and
brake:
This subclass is indented under subclass 182. Subject matter
wherein interrelated engine* and brake* regulating means
alternatively (a) varies an amount of driving energy supplied
to the engine and (b) moves the brake* into a force applying
or releasing position.
(1) Note. The interrelated regulating means usually
comprises (a) single working element moveable by a human
operator for alternative regulation of the engine or the
brake; or (b) plural working elements engage able by a human
foot wherein the foot is moveable in more than one direction
for alternative regulation of the engine or of the brake.
Subclass:
210
Foot operated control means:
This subclass is indented under subclass 209. Subject matter
wherein the interrelated engine* and brake* regulating means
are caused to function by engagement with the terminal part
of a human leg; i.e., foot.
Subclass:
211
Engine and brake control including interconnected elements:
This subclass is indented under subclass 210. Subject matter
wherein the interrelated engine* and brake* regulating means
comprises working members which are attached to each other
and are independently operated by separate engagement with
the foot.
SEE OR SEARCH CLASS:
74, Machine Element or Mechanism, subclass 478.5 for two
foot operated controllers for separate systems.
Subclass:
212
Pivots and translates:
This subclass is indented under subclass 210. Subject matter
wherein the interrelated engine* and brake* regulating means
comprises a single member-engaged by the foot, and the member
is alternatively or simultaneously (a) turned about a
relatively fixed axis and (b) moved linearly; i.e.,
translated.
Subclass:
213
Pivots about intermediate fulcrum:
This subclass is indented under subclass 212. Subject matter
wherein the relatively fixed axis is located between the ends
of the member such that either end of the member can be moved
about the axis.
Subclass:
214
Pivots about two fulcrums:
This subclass is indented under subclass 210. Subject matter
wherein the interrelated engine* and brake* regulating means
comprises a single member engaged by the foot, which member
is alternatively (a) turned about a first relatively fixed
axis and (b) turned about a second relatively fixed axis.
Subclass:
215
Pivots about intermediate fulcrum:
This subclass is indented under subclass 210. Subject matter
wherein the interrelated engine* and brake* regulating means
comprises a single member engaged by the foot, which member
is turned about a relatively fixed axis, and the axis is
located between the ends of the member such that either end
of the member can be moved about the axis.
Subclass:
216
Lever reciprocates on moveable supports at both ends:
This subclass is indented under subclass 210. Subject matter
wherein the interrelated engine* and brake* regulating means
comprises a single member engaged by the foot which member is
alternatively moved back and forth on each displaceably held
terminus.
Subclass:
217
Pivots for sequential operation:
This subclass is indented under subclass 210. Subject matter
wherein the interrelated engine* and brake* regulating means
comprise a single member engaged by the foot whereby force is
applied at one end only to turn that member about a
relatively fixed axis and whereby initial turning movement
regulates one of the engine* or brake*, and continued
rotation regulates the other of the engine* or brake*.
Subclass:
218
Control means including fluid passage:
This subclass is indented under subclass 209. Subject matter
wherein the interrelated engine* and brake* regulating means
includes a flow path for liquid or gas.
CROSS-REFERENCE ART COLLECTIONS
Subclass:
900
CONTROL SIGNAL IS VEHICLE WEIGHT:
This subclass is indented under the class definition. A
collection of patents wherein the total mass of the vehicle
regulates a power delivery control.
SEE OR SEARCH CLASS:
180, Motor Vehicles, subclass 290 for vehicle safety
promotion responsive to weight.
Subclass:
901
CONTROL SIGNAL IS SLOPE:
This subclass is indented under the class definition. A
collection of patents wherein the angle of inclination of the
road surface regulates a power delivery control.
SEE OR SEARCH THIS CLASS, SUBCLASS:
42 and 108, for cruise control responsive to slope.
Subclass:
902
CONTROL SIGNAL IS ENGINE PARAMETER OTHER THAN MANIFOLD
PRESSURE OR FUEL CONTROL:
This subclass is indented under the class definition. A
collection of patents wherein a condition of the engine other
than manifold pressure or fuel control regulates a power
delivery control.
Subclass:
903
CONTROL SIGNAL IS STEERING:
This subclass is indented under the class definition. A
collection of patents wherein mean to change the direction of
travel of a vehicle regulates a power delivery control.
SEE OR SEARCH CLASS:
180, Motor Vehicles, subclass 421 for condition modulated
steering.
Subclass:
904
CONTROL SIGNAL IS ACCELERATION:
This subclass is indented under the class definition. A
collection of patents wherein the time rate of change of the
velocity of an element regulates a power delivery control.
Subclass:
905
Acceleration of throttle signal:
This subclass is indented under subclass 904. A collection of
patents wherein the element is the throttling element of an
internal combustion engine.
Subclass:
906
MEANS DETECTING OR AMELIORATING THE EFFECTS OF MALFUNCTION OR
POTENTIAL MALFUNCTION:
This subclass is indented under the class definition. A
collection of patents wherein means are provided for sensing
an abnormal condition or potentially abnormal condition and
neutralizing a consequence of the abnormal condition or
potentially abnormal condition.
Subclass:
907
Redundant:
A collection of patents under collection 906 wherein
duplicate means are provided to neutralize the effects of an
abnormal or potentially abnormal condition.
Subclass:
908
IN SERIES TRANSMISSION:
This subclass is indented under the class definition. A
collection of patents wherein two or more transmissions are
in series and their power delivery controls are
interrelated.
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