B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/84
B60T 11/20 (2006.01)
Patent
CA 1150751
MASTER CYLINDER AND PROPORTIONING VALVE THEREFOR ABSTRACT OF THE DISCLOSURE A master cylinder provides a housing defining a reservoir and movably carrying a pair of pistons within a bore in communication with the reservoir. The pair of pistons cooperate with the housing to substantially define a pair of pressure chambers which communicate with respective brake circuits. One of the pistons forms a cavity to receive a reaction piston and the one piston also carries a proportion- ing valve. The reaction piston forms an auxiliary chamber within the one piston and the proportioning valve is exposed to the auxiliary chamber. The reaction piston extends outwardly into one of the pres- sure chambers to engage the housing and the valve member is respon- sive to the fluid pressure in the other pressure chamber to control fluid communication between the auxiliary chamber and the reservoir. When the valve member closes the auxiliary chamber during a brake application the movement of the one piston relative to the reaction piston increases fluid pressure in the auxiliary chamber to oppose movement of the one piston. Therefore, the increase of fluid pres- sure within the one pressure chamber is restricted so as to pro- portion fluid communication from the one pressure chamber.
361664
Bendix Corporation (the)
Macrae & Co.
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