Motors: expansible chamber type – With motive fluid valve – Relatively movable serial valves
Patent
1978-06-23
1981-02-17
Cohen, Irwin C.
Motors: expansible chamber type
With motive fluid valve
Relatively movable serial valves
91447, 91448, 91451, 13759612, 13762568, F15B 1108, F15B 13042
Patent
active
042507952
ABSTRACT:
The present invention relates to a hydraulic brake booster and a shuttle valve which is operable to limit the pressure communicated to a pressure chamber within the hydraulic brake booster. The shuttle valve is disposed within a control valve which is operator-actuated to communicate pressurized fluid to the pressure chamber so as to provide a power assist to braking via a piston responsive to pressurized fluid in the pressure chamber. The shuttle valve is exposed to the pressure chamber and movable relative to the control valve when the pressure in the pressure chamber is above a predetermined value in order to terminate or decrease communication of pressurized fluid to the pressure chamber. At the same time the shuttle valve cooperates with the control valve to reopen communication to an outlet as the control valve operates to close communication thereto during braking.
REFERENCES:
patent: 2701552 (1955-02-01), Light
patent: 2954052 (1960-09-01), Krehbiel
patent: 3426790 (1969-02-01), Dey
patent: 3576194 (1971-04-01), Christensen
patent: 3603209 (1971-09-01), MacDuff et al.
patent: 3724332 (1973-04-01), Bach
patent: 3728942 (1973-04-01), Brown, Jr.
patent: 3747475 (1973-07-01), Runkle
patent: 3805671 (1974-04-01), Carre
patent: 4050251 (1977-09-01), Carre et al.
patent: 4117862 (1978-10-01), Qureshi
Cohen Irwin C.
Decker Ken C.
Schoenle Paul David
The Bendix Corporation
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