Motors: expansible chamber type – Working member position feedback to motive fluid control – Follower type
Patent
1988-09-23
1990-02-13
Garrett, Robert E.
Motors: expansible chamber type
Working member position feedback to motive fluid control
Follower type
91378, 60548, F15B 910
Patent
active
048996408
ABSTRACT:
A hydraulic booster has a boost piston (19) which receives the thrust of boost pressure generated in a boost chamber (15) to move the boost piston for urging a master piston (12) of a master cylinder in a brake applying direction. An input member (17) is relatively movably with respect to the boost piston (19). A pressure regulating device has an input directional control valve (22, 45) for allowing or cutting off communication between the boost chamber (15) and an auxiliary power source (14). An output directional control valve (24, 46) establishes or cuts off communication between the boost chamber (15) and a reserve tank (9). The boost piston (19), the input member (17) and the pressure regulating device are arranged inside a housing (1). An input member positioning device brings the rear end of the input member (17) into contact with a stop member (51) which is anchored to the housing (1), when a pedal force is zero for stopping a rearward movement of the input member. A boost piston positioning device balances the force that pushes the boost piston (19) in a rearward direction with a force that pushes the boost piston (19) in a forward or frontward direction by boost pressure when the pedal force is zero thereby to stop a rearward movement of the boost piston.
REFERENCES:
patent: 2318756 (1943-05-01), Chouings
patent: 4179980 (1979-12-01), Kito et al.
patent: 4379423 (1983-04-01), Leineweber et al.
patent: 4415210 (1983-11-01), Belart et al.
patent: 4523791 (1985-06-01), Belart et al.
patent: 4548037 (1985-10-01), Farr
patent: 4642990 (1987-02-01), Mizusawa
SAE Technical Paper Series 840465, Society of Automotive Engineers, Inc., U.S.A.
Fasse W. G.
Garrett Robert E.
Kane, Jr. D. H.
Sumitomo Electric Industries Ltd.
Williamson Mark A.
LandOfFree
Hydraulic booster does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic booster, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic booster will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1160367