F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
138/78.1
F15B 9/17 (2006.01) F15B 18/00 (2006.01)
Patent
CA 1203145
ABSTRACT CONTROL ACTUATION SYSTEM INCLUDING STAGED DIRECT DRIVE VALVE WITH FAULT CONTROL A control actuation system (70) for an aircraft including an electro-mechanically controlled, hydraulically powered actuator (72) for driving a main control valve (26) of a dual hydraulic servo-actuator control system (10). The actuator includes a tandem piston (74) connected to the main control valve (26) which is controllably positioned by a staged valve (125) of relatively short stroke whereby a force motor (218) of minimum size and energy requirements may be used to directly drive the valve. The staged valve (125) includes a linearly movable valve plunger (184) for simultaneously controlling the differential application of fluid pressure from respective hydraulic systems on opposed pressure surfaces (94, 96 and 98, 100) of respective piston sections (90, 92) to cause movement of the piston (74) in response to relatively short axial movement of the valve plunger as long as at least one hydraulic system remains operative. Also, the staged valve (125) includes a fault control valve sleeve (130) concentric with the valve plunger (184) which, upon shut-down or failure of both hydraulic systems, moves linearly to render the valve plunger inoperative and release fluid pressure from opposed, corresponding pressure surfaces (94, 96 and 98, 100) of the tandem piston to respective returns therefor through respective centering rate control orifices (118, 120, 250, 252) in the fault control valve sleeve (130) as the piston is moved to a neutral position by a centering spring device (254) acting on the main control valve (26).
445533
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Pneumo Corporation
LandOfFree
Control actuation system including staged direct drive valve... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control actuation system including staged direct drive valve..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control actuation system including staged direct drive valve... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1260920