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*.
SECTION II - 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.
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.
Data Processing: Vehicles,
Navigation, and Relative Location,
subclasses 51+ for vehicle transmission control including significant
calculations but absent specific transmission control structure.
SECTION IV - 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.*
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*.
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*.
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*.
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*.
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.
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.
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.
This subclass is indented under subclass 8. Subject matter wherein the power to the engine* is automatically
disconnected after a predetermined amount of motion.
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.
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.
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.
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.
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*.
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.
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.
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.*
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.
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.
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.
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.
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.
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.
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.
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*.
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.
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.
Planetary Gear Transmission
Systems or Components, for planetary gear transmission, per se, and particularly
subclasses 220+ for differential transmissions.
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.
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.
This subclass is indented under subclass 37. Subject matter wherein the continuously variable friction transmission
is combined with a means to regulate a clutch*.
This subclass is indented under subclass 37. Subject matter wherein the continuously variable friction transmission
is combined with a means to regulate a brake*.
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*.
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*.
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.
This subclass is indented under subclass 37. Subject matter wherein the continuously variable friction transmission comprises
an endless flexible band entrained about parallel pulleys.
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*.
This subclass is indented under subclass 45. Subject matter wherein the regulation of the fluid pressure is effective
to change the transmission speed ratio*.
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*.
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.
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.
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.
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*.
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.
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*.
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.
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.
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.
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*.
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.
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.
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.
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.
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.
This subclass is indented under subclass 62. Subject matter wherein the clutch* is regulated during a change
in speed ratio* of the gear transmission*.
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.
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.
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.
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.
This subclass is indented under subclass 52. Subject matter wherein the speed ratio of the fluid torque transmitting means
is regulated by the engine*.
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.
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*.
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.
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.
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