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US 7,607,607 B2Granted
De-rotation system suitable for use with a shaft fairing system
AssigneeSikorsky Aircraft Corporation
InventorsDavid A. Darrow, Jr., Frank P. D'Anna, Thomas L. Sbabo
Life of this patent
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Abstract
A de-rotation system includes a first ring gear defined about an axis of rotation, a second ring gear defined about the axis of rotation and a gear set in meshing engagement with the first ring gear and the second ring gear to control a position of a housing about the axis of rotation.
Claims20
A de-rotation system for a fairing comprising:
- a first ring gear rotatable about a rotor axis of rotation;
- a second ring gear rotatable about said rotor axis of rotation;
- a gear set in meshing engagement with said first ring gear and said second ring gear;
- a housing which supports said gear set, said gear set operable to control a position of said housing about said rotor axis of rotation;
- and
- a shaft fairing mounted to said housing for rotation about said rotor axis of rotation.
3 more elements
A counter-rotating coaxial rotor system comprising:
- a lower rotor hub mounted to a lower rotor shaft which rotates about a rotor axis of rotation;
- an upper rotor hub mounted to an upper rotor shaft which rotates about said rotor axis of rotation in a direction counter to said rotation of said lower rotor shaft, said upper rotor shaft mounted at least partially through said lower rotor shaft;
- an upper hub fairing mounted at least partially about said upper rotor hub;
- a lower hub fairing mounted at least partially about said lower rotor hub;
- a shaft fairing mounted between said upper hub fairing and said lower hub fairing for rotation about said rotor axis of rotation;
- a first ring gear defined about said rotor axis of rotation, said first ring gear mounted for rotation with said upper rotor shaft;
- a second ring gear defined about said rotor axis of rotation, said first ring gear mounted for rotation with said lower rotor shaft;
- a gear set in meshing engagement with said first ring gear and said second ring gear;
- and
- a housing mounted to said shaft fairing to support said gear set, said gear set operable to control a position of said shaft fairing about said axis of rotation.
7 more elements
An aircraft having a counter-rotating coaxial rotor system comprising:
- a lower rotor hub mounted to a lower rotor shaft which rotates about a rotor axis of rotation;
- an upper rotor hub mounted to an upper rotor shaft which rotates about said rotor axis of rotation in a direction counter to said rotation of said lower rotor shaft, said upper rotor shaft mounted at least partially through said lower rotor shaft;
- an upper hub fairing mounted at least partially about said upper rotor hub;
- a lower hub fairing mounted at least partially about said lower rotor hub;
- a shaft fairing mounted between said upper hub fairing and said lower hub fairing for rotation about said rotor axis of rotation;
- a first ring gear defined about said rotor axis of rotation, said first ring gear mounted for rotation with said upper rotor shaft;
- a second ring gear defined about said rotor axis of rotation, said first ring gear mounted for rotation with said lower rotor shaft;
- a gear set in meshing engagement with said first ring gear and said second ring gear;
- and
- a housing mounted to said shaft fairing to support said gear set, said gear set operable to control a position of said shaft fairing about said axis of rotation.
7 more elements
Dependencies are inferred from the claim text.