IP Library › Granted Patent US 8,931,732
Granted Patent B2
US 8,931,732 · App. 12/018,217 · Granted Jan 13, 2015

Electric powered rotary-wing aircraft

Inventors: Jayant Sirohi (Milford, CT); Timothy Fred Lauder (Oxford, CT); Mark R. Alber (Milford, CT); Daniel Bazzani (Milford, CT)
Assignee: Sikorsky Aircraft Corporation
B64D27/24B64C27/22B64C27/68B64C29/00B64C39/024B64C2201/024B64C2201/042B64C2201/108Y02T50/44Y02T50/64
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Quick Facts
Patent No.
US 8,931,732
App. No.
12/018,217
Granted
Jan 13, 2015
Kind
B2
Abstract

A rotary-wing aircraft with an electric motor mounted along an axis of rotation to drive a rotor system about the axis of rotation.

Claims (22)

1. A rotary-wing aircraft comprising:

a rotor system rotatable about an axis of rotation; and

an electric motor mounted along said axis of rotation to drive said rotor system about said axis of rotation; and

a servo system mounted within said rotor system to pitch a rotor blade mounted to a rotor hub.

2. The aircraft as recited in claim 1 , further comprising a controller within said rotary-wing aircraft to operate said servo system.

3. A rotary-wing aircraft comprising:

a rotor system rotatable about an axis of rotation; and

an electric motor mounted along said axis of rotation to drive said rotor system about said axis of rotation, said electric motor mounted at least partially within a rotor hub of said rotor system.

4. The aircraft as recited in claim 3 , further comprising a rotationally fixed rotor shaft which mounts said rotor hub.

5. The aircraft as recited in claim 3 , wherein said electric motor is an overrunning motor.

6. The aircraft as recited in claim 3 , further comprising a servo system mounted within said rotor system to pitch a rotor blade mounted to a rotor hub.

7. The aircraft as recited in claim 6 , further comprising a controller within said rotary-wing aircraft to operate said main rotor servo system.

8. The aircraft as recited in claim 3 , wherein said electric motor is mounted completely within said rotor hub.

9. The aircraft as recited in claim 3 , wherein said servo system is operable to pitch a rotor blade mounted to said rotor hub.

10. A rotary-wing aircraft comprising:

a rotor system rotatable about an axis of rotation; and

an electric motor mounted along said axis of rotation to drive said rotor system about said axis of rotation, said electric motor mounted at least partially within a rotor shaft of said rotor system.

11. The aircraft as recited in claim 10 , wherein said electric motor is an overrunning motor.

12. The aircraft as recited in claim 10 , further comprising a servo system mounted within said rotor system to pitch a rotor blade mounted to a rotor hub.

13. The aircraft as recited in claim 12 , further comprising a controller within said rotary-wing aircraft to operate said servo system.

14. The aircraft as recited in claim 10 , wherein said electric motor is mounted completely within said rotor shaft.

15. The aircraft as recited in claim 10 , wherein said servo system is operable to pitch a rotor blade mounted to said rotor hub.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 23, 2008
From: SIROHI, JAYANT; LAUDER, TIMOTHY FRED; ALBER, MARK R.; BAZZANI, DANIEL
To: SIKORSKY AIRCRAFT CORPORATION
Reel/Frame 020399/0058 →
Continuity (2)
Provisional Application 60991395 · Nov 30, 2007
Related Publication 20090140095A1 · Jun 4, 2009