Master cylinder

Details Master cylinder Master cylinder

1986-08-21

1988-05-17

Hershkovitz, Abraham

Power plants

Pressure fluid source and motor

Pulsator

60588, 460T, B60T 1108

Patent

active

047442190

ABSTRACT:
A master cylinder has a piston slidably fitted in a stepped cylinder bore including a first pressure chamber connected through a coupling hole to a reservoir. When a fluid pressure in the first pressure chamber is increased to a predetermined level at the time the piston is moved forward, a second valve disposed in the coupling hole is opened to release a fluid pressure from the first pressure chamber into the reservoir. When a negative pressure is developed in the first pressure chamber as the piston is moved back, a first valve in the coupling hole is opened to supply a fluid from the reservoir into the first pressure chamber. The first valve comprises an annular plate fixedly mounted in the coupling hole, a valve body housing the second valve and disposed concentrically with respect to the plate, a spring disposed between an upper portion of the valve body and an upper portion of the plate, and seal member fixed to a lower portion of the plate, the valve body having a flange engageable with the seal member.

REFERENCES:
patent: 4208881 (1980-06-01), Brademeyer et al.
patent: 4372117 (1983-02-01), Kobayashi
patent: 4445334 (1984-05-01), Derrick
patent: 4483145 (1984-11-01), Takeuchi et al.

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