Hydraulic brake booster and valve member

Details Hydraulic brake booster and valve member Hydraulic brake booster and valve member

B - Operations, Transporting

60

T

303/70

B60T 15/00 (2006.01) B60T 13/14 (2006.01)

Patent

CA 1116208

HYDRAULIC BRAKE BOOSTER AND VALVE MEMBER ABSTRACT OF THE DISCLOSURE 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.

321441

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