 Concentric ring antenna |
| To overcome the limitations of the prior art, a method and apparatus is provided to permit exciting ... |
|
| Doppler frequency impulse radar system with displaced pulse sequence |
| I claim: 1. A doppler frequency impulse radar system, comprising a transmitting circuit for ... |
|
| Method of screening infra-red radiation |
| I claim: 1. A method of screening infra-red radiation which comprises forming between the source of ... |
|
| Electrical noise detector for detecting power line gap defects |
| In accordance with the present invention, a device for identifying a defect in power line equipment ... |
|
| Test bench for wideband radio link |
| What we claim is: 1. A radio link test bench system, comprising: (1) transmission station means, ... |
|
| Apparatus for accomplishing autoport selection |
| It is, therefore, an object of the present invention to reduce the need for technicians to make ... |
|
| Refuse compacting and transporting system |
| Referring to the drawings in detail, wherein like numerals designate like parts, a refuse ... |
|
| Humane animal trap |
| What I claim is: 1. An animal trap comprising a casing, said casing including opposed upper and ... |
|
| Dust bag for animal insecticide |
| OF THE INVENTION In the accompanying drawings which form a part of the specification and are to be ... |
|
|
Coaxial transmission/center hub subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors
| Details |
Inventors: Cycon, James P.; Kohlhepp, Fred W.; Millea, Vincent F.;
Assignee: United Technologies Corporation (Hartford, CT)
Primary Examiner: Huppert; Michael S.
Assistant Examiner: Bidwell; Anne E.
Attorney, Agent or Firm: Radke; Terrance J.
One embodiment of a coaxial transmission/center hub subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors includes a single stage transmission, a transmission housing, and a center hub support structure that are structurally and functionally interactive. The transmission housing includes upper and lower standpipe housings secured in combination with a middle housing. The single stage transmission includes an input pinion gear rotatably mounted in combination with the middle housing, and upper and lower spiral bevel gears rotatably coupled in combination with the input pinion gear to provide counter-rotation thereof. The spiral bevel gears include integral rotor shafts, respectively, rotatably mounted in the standpipe housings. The hub support structure is configured for securement of the middle housing internally in combination therewith, with respective surfaces thereof in abutting engagement so that dynamic loads of the rotors and thermal loads are directly coupled into the hub support structure via the middle housing while bending moments of the rotors are canceled in the middle housing. The hub support structure has radially extending arms for mounting the coaxial transmission/center hub subassembly in fixed coaxial relation to an airframe structure and for coupling the dynamic and thermal loads to the airframe structure. External surfaces of the standpipe housings function as sliding surfaces for linear motion of swashplate subassemblies to minimize the separation between the rotors so that the airframe structure has a compact aerodynamic and structural envelope. The transmission housing is internally configured to provide a splash lubrication subsystem. |
|
DETAILED DESCRIPTION One object of the present invention is to provide a coaxial transmission/center hub subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors that includes a single stage transmission, a transmission housing, and a center hub support structure that are structurally and functionally interactive.
Another object of the present invention is to provide a coaxial transmission/center hub subassembly that includes a single stage transmission that provides enhanced power transfer efficiency between the engine and the counter-rotating rotors.
Yet another object of the present invention is to provide a single stage transmission for the coaxial transmission/center hub subassembly that includes an input pinion gear rotatably mounted in combination with the transmission housing and upper and lower bevel gears rotatably coupled in combination with the input pinion gear to provide counter-rotation thereof.
Still another object of the present invention is to provide a single stage transmission for the coaxial transmission/center hub subassembly wherein the spiral bevel gears include integral rotor shafts rotatably mounted in the transmission housing.
A further object of the present is to provide a transmission housing for the coaxial transmission/center hub subassembly that includes upper and lower standpipe housings secured in combination with a middle housing.
Yet a further object of the present invention is to provide a center hub support structure for the coaxial transmission/center hub subassembly that is configured for securement of the middle housing internally in combination therewith, with respective surfaces thereof in abutting engagement, so that dynamic loads of the counter-rotating rotors and thermal loads are directly coupled into the center hub support structure via the middle housing and bending moments of the counter-rotating rotors are canceled in the middle housing.
Still a further object of the present invention is to provide a center hub support structure for the coaxial transmission/center hub subassembly having radially extending arms for mounting the coaxial transmission/center hub subassembly in fixed coaxial relation to an airframe structure and for coupling the dynamic and thermal loads to the airframe structure
|
| Related patents |
|
|
Gas bag inflators
An object of the invention is to provide a simple and effective solution to the foregoing problem. Another object of the invention is to provide an improvement for a ...
|
|
|
Arrangement for an airbag gas generator
The invention relates to an arrangement for a gas generator of a motor vehicle occupant protection system, the primary charge of which is arranged in a housing which has ...
|
|
|
Vented gas passenger side air bag inflator
An object of the invention is to provide an improved solid fuel inflator assembly for air bag restraint systems used on the passenger side of automotive vehicles. A...
|
|
|
Sensor for vehicle seat belt systems
What is claimed is: 1. A sensor for vehicle seat belt systems comprising a casing, an inertia body having at least a portion received in the casing for displacement ...
|
|
|
Plastic air bag cover having an integrated light source
An object of the present invention is to provide an air bag cover having a light source module incorporated therein to project an information-bearing image within a ...
|
|
|
Spread spectrum communications system
Accordingly, it is a general object of the present invention to provide an improved spread spectrum communications system in which the above described problems are ...
|
|
|
Spread spectrum pulse position modulation system
Accordingly, the present invention has been made in consideration of the above problems in the background art, and an object of the present invention is to provide a ...
|
|
|
Sequential detection system and method with adaptive bias
This invention relates generally to cellular telephone communications, and more particularly to a system and method for CDMA receivers to adaptively change the bias in ...
|
|
|
Control systems for radar receivers
What is claimed is: 1. In a return echo ranging system, comprising: means for transmitting a ranging signal; a receiver for receiving one or more echo signals from said ...
|
|
|
Power factor correction system
Briefly, a power factor correction (PFC) system in accordance with the present invention is coupled to at least n power lines of an n phase power distribution system. T...
|
|
|
Telecommunications 
