Fluid reaction surfaces (i.e. – impellers) – Radially extensible or retractible rotor working member
Patent
1998-12-18
2000-02-29
Look, Edward K.
Fluid reaction surfaces (i.e., impellers)
Radially extensible or retractible rotor working member
416 88, 416 89, 416170R, 244 8, 244 1723, 244 56, 244 39, 475296, 475269, 475302, B64C 1104, B64C 2772, F01D 700, F03B 314
Patent
active
060301775
ABSTRACT:
A drive system for a variable diameter rotor system that includes a plurality of rotor blade assemblies with inner and outer blade segments. The outer blade segment being telescopically mounted to the inner blade segment. The drive system engaging a jackscrew for telescoping the outer blade segment with respect to the inner blade segment. The drive system includes a rotor hub that is pivotally mounted to the upper end of a main rotor shaft about a pivot point. A gimbaled bearing is disposed between and attached to the main rotor shaft and the rotor hub. The gimbaled bearing permits the rotor hub to pivot about the pivot point. A blade actuation shaft is concentrically disposed within the main rotor shaft. The blade actuation shaft has a constant velocity joint pivotally attached to its upper end about the pivot point. A planetary gearset engages the blade actuation shaft with the jackscrew. The planetary gearset includes a sun gear that is attached to the housing and a ring gear that is attached to the rotor hub. A plurality of pinion gears are disposed between and intermesh with the sun gear and the ring gear. The pinion gears are rotatably mounted to a pinion cage which, in turn, is rotatable with respect to the housing and the ring gear. A lower hypoid bevel gear is rotatably driven by the pinion gears and adapted to intermesh with an output pinion on the jackscrew.
REFERENCES:
patent: 4080097 (1978-03-01), Hager et al.
patent: 4566856 (1986-01-01), Miller
patent: 4580945 (1986-04-01), Miller
patent: 4804352 (1989-02-01), Schmidt
patent: 5116201 (1992-05-01), Fradenburgh et al.
patent: 5253979 (1993-10-01), Fradenburgh et al.
patent: 5299912 (1994-04-01), Fradenburgh et al.
patent: 5620303 (1997-04-01), Moffitt et al.
patent: 5620304 (1997-04-01), Matsuka et al.
patent: 5636969 (1997-06-01), Matuska et al.
patent: 5642982 (1997-07-01), Matuska et al.
patent: 5655879 (1997-08-01), Kiely et al.
patent: 5735670 (1998-04-01), Moffitt et al.
Barton Rhonda
Look Edward K.
Sikorsky Aircraft Corporation
LandOfFree
Drive system for a variable diameter tilt rotor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drive system for a variable diameter tilt rotor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drive system for a variable diameter tilt rotor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-676958