Two stage relief valve for master cylinder quick-fill chamber

Details Two stage relief valve for master cylinder quick-fill chamber Two stage relief valve for master cylinder quick-fill chamber

1988-09-28

1989-08-29

Garrett, Robert E.

Power plants

Pressure fluid source and motor

Pulsator

1375122, B60T 1116, B60T 1134, F16K 1504, F16K 1514

Patent

active

048605417

ABSTRACT:
A two stage relief valve for a quick-fill master cylinder (10). The two stage relief valve (54) has a ball (88) that is biased against a first seat (82) to control the flow of fluid from a quick-fill chamber (30) and a unitary structure (55, 74) which is biased against a second seat (70) to further control the flow of fluid from the quick-fill chamber (30). A first predetermined fluid pressure moves the ball (88) off the first seat (82) to allow fluid to escape from the quick-fill chamber (30). A second predetermined fluid pressure moves the unitary structure (55, 74) to allow additional fluid to escape and thereby limit the fluid pressure development in the quick-fill chamber (50).

REFERENCES:
patent: 3307667 (1967-03-01), Maurice
patent: 3749121 (1973-07-01), Frankewich
patent: 4370102 (1983-01-01), Sasaki et al.
patent: 4455832 (1984-06-01), Gaiser et al.
patent: 4472940 (1984-09-01), Kubota
patent: 4640098 (1987-02-01), Brademeyer et al.
patent: 4694651 (1987-09-01), Yardley et al.

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