Fluid pressure generator and valve member therefor

Details Fluid pressure generator and valve member therefor Fluid pressure generator and valve member therefor

B - Operations, Transporting

60

T

303/83

B60T 11/20 (2006.01) B60T 8/26 (2006.01) B60T 17/22 (2006.01)

Patent

CA 1120975

FLUID PRESSURE GENERATOR AND VALVE MEMBER THEREFOR ABSTRACT OF THE DISCLOSURE A fluid pressure generator, such as a master cylinder, includes a housing with a bore for movably supporting a pair of pistons, The pair of pistons cooperate with the housing and with each other to substantially define a pair of pressure chambers which are communicated with respec- tive brake assemblies. A first piston of the pair of pistons is mov- able within the housing to pressurize a primary pressure chamber and the second piston of the pair of pistons is movable in response to pressurized fluid within the primary pressure chamber so as to pres- surize a secondary pressure chamber. The second piston carries a valve assembly and includes a passage to provide fluid communication between the secondary pressure chamber and its respective brake assembly. The valve assembly is movable in response to the pressure of fluid within the secondary pressure chamber and a shuttle member is movable in response to a pressure variation between the primary pressure chamber and the secondary pressure chamber to move the valve assembly to a position opening the passage. The valve assembly is disposed within the second piston and is defined by a sleeve and a pilot member. The sleeve slidably receives the shuttle member within a bore on the sleeve and the pilot member is connected to the shuttle member.

334299

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