Fluid-pressure and analogous brake systems – Multiple fluid-receiving devices – Multiple motors
Patent
1980-05-15
1984-08-21
Butler, Douglas C.
Fluid-pressure and analogous brake systems
Multiple fluid-receiving devices
Multiple motors
188349, B60T 1300
Patent
active
044666713
ABSTRACT:
An improved fluid pressure controlling device for a vehicle braking system has a valve housing provided with an input chamber communicating with an output port of a master cylinder and an output chamber communicating with a rear wheel brake. A resilient valve seat separating the input and output chambers from each other is disposed in the input chamber. The resilient valve seat is provided with a valve port through which the input and output chambers are communicate with each other. A valve member is accommodated in the output chamber for opening and closing the valve port. The valve member is resiliently biased by a spring in a direction to move the pressure-receiving piston away from the resilient valve seat. The valve seat has an inner peripheral portion with a conical valve seat surface opposing the valve member and an annular thin-walled portion surrounding the inner peripheral portion. The annular thin-walled portion is seatingly engageable with the valve member and deformable to improve responsiveness of the valve member to pressure differential between the input and output chambers, whereby excellent sealing between the input and output chambers is provided without any accompanying substantial braking hysteresis during the brake-releasing operation.
REFERENCES:
patent: 3147046 (1964-09-01), Stelzer
patent: 3408814 (1968-11-01), Stelzer
patent: 3423936 (1969-01-01), Stelzer
Butler Douglas C.
Nissin Kogyo Kabushiki Kaisha
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