USPC 244/53

The U.S. Patent Classification subclass USPC 244/53 is for Power plants or accessories thereto peculiar to aircraft and incorporated with aircraft structure.

Category tree below USPC 244/53, from USPTO site:

• USPC 244/53 Aircraft power plants. under 244. Power plants or accessories thereto peculiar to aircraft and incorporated with aircraft structure.

Power plants per se go into Class 60. Starters for power plants of aircraft type are in Class 123, Internal-Combustion Engines, subclass 179.

Devices for cooling internal combustion engines with air belong in Class 123, Internal-Combustion Engines, mainly in subclasses 41.56+, particularly subclass 41.7. This includes aircraft engine cowling or enclosure devices to direct flows of air against the engine or accessory parts to be cooled, and include so much of the aircraft structure as necessary to support the engine, cowling, or enclosure, or to complete the control of the flow of air through the cowling or enclosure.

Impellers combined with a motor are found in Class 416, Fluid Reaction Surfaces (i.e., Impellers).

• USPC 244/54 Mounting: Arrangements for mounting power plants on aircraft, including mounting arrangements which permit release and dropping of the motor. See also Class 248, Supports, subclasses 554+. See Class 180, Motor Vehicles, subclasses 291+ for a motor vehicle wherein the motor and the body frame are particularly related to one another.

• • USPC 244/55 Arrangement: The relative arrangement between power plants on aircraft or between one or more power plants and the aircraft.
  • USPC 244/56 Tilting: Aircraft power plants so arranged that the vertical angle between the line of thrust developed by the power plant and the horizontal axis of the aircraft may be varied at will or in response to changing conditions. This subclass includes tilting power plants which carry screw propellers. For tilting propellers alone, see subclass 66.
  • USPC 244/57 Radiator arrangement: Arrangements or mounting of radiators and analogous devices on aircraft.

See Class 123, Internal-Combustion Engines, subclass 41.43 for an internal combustion engine with a movably mounted tank or radiator.

See Class 165, Heat Exchange, subclasses 41+ for a heat exchanger installed on a vehicle, and subclass 149 for a radiator with edge cover or frame means.

• • USPC 244/58 Auxiliary: Devices for developing power either for the purpose of emergency aircraft propulsion or for assisting in the propulsion or operation of aircraft.
  • USPC 244/59 High altitude: Devices and arrangements for propelling aircraft at high altitudes, and devices peculiar to aircraft for permitting aircraft to be propelled to high altitudes.

For super-chargers in general, see Class 123, Internal-Combustion Engines, subclasses 434+.

For garments providing oxygen to aviators, see Class 128, Surgery, subclass 202.11.

For arrangements providing breathable air and all sorts of applications, see Class 128, Surgery, subclasses 200.24+.

Search Class 454, Ventilation, subclasses 71+ for means to automatically maintain the air in aircraft cabins under pressure and subclasses 76+ for means to circulate air through aircraft cabins, where characteristics of aircraft propulsion, sustenation, or details of structure are not claimed.

• • USPC 244/60 Transmission of power: Gearing and other means peculiar to aircraft for transmitting power from a power plant to a driven element.

For foot pedals, including double pedals, and their associated mechanism for operating controls and brakes, see USPC 244/235.

For gearing in general and other machine elements and mechanisms, see Class 74, Machine Element or Mechanism.

• • USPC 244/61 Power plant using airship gas as fuel: Aircraft power plants adapted to use some part of the sustaining gas or some other gas peculiarly adapted for airship use as fuel.

References

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Enclosing categories	USPC 244
Subcategories	USPC 244/54, USPC 244/55, USPC 244/56, USPC 244/57, USPC 244/58, USPC 244/59, USPC 244/60, USPC 244/61, USPC 244/53A, USPC 244/53B
Keywords	USPC 62, Engine, Propulsion
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