Motors: expansible chamber type – Working member moved by stored motive fluid charge
Patent
1980-01-16
1981-08-04
Maslousky, Paul E.
Motors: expansible chamber type
Working member moved by stored motive fluid charge
91 6, 91391R, 92 81, F15B 1310, F01B 2502
Patent
active
042815851
ABSTRACT:
A hydraulic brake booster includes a housing which defines a pressure chamber and a piston within the housing is movable in response to pressurized fluid within the pressure chamber to effectuate a brake application. The piston encloses a storage chamber and forms a passage communicating the storage chamber with the pressure chamber. A valve member is disposed within the passage to control communication between the storage chamber and the pressure chamber. An operator actuator cooperates with a control valve to communicate pressurized fluid to the pressure chamber and a finger is actuated by the operator actuator to engage the valve member, thereby opening communication between the storage chamber and the pressure chamber. The valve member comprises a unitary assembly having a sleeve sealingly engaging the wall of the piston passage, a seat member biased into engagement with a shoulder defined by a stepped bore on the sleeve, and a stem extending through a bore on the seat member.
REFERENCES:
patent: 2638075 (1953-05-01), Towler
patent: 3447421 (1969-06-01), Pelouch
patent: 3633363 (1972-01-01), Larsen
patent: 3677007 (1972-07-01), Goscenski
patent: 3780620 (1973-12-01), Gardner
patent: 3937126 (1976-02-01), Grabb et al.
Harrison Gregory K.
Runkle Dean E.
Tang Louis S.
Decker Ken C.
Maslousky Paul E.
Miller Terry L.
Schoenle Paul David
The Bendix Corporation
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