Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1987-03-20
1989-03-21
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
251337, 267170, 303 973, B60T 826
Patent
active
048134503
ABSTRACT:
A fluid pressure control valve includes a housing having an inner hole and a plunger movably disposed in the inner hole, the housing having inlet and non-pressure chambers defined herein at one end of the plunger and an outlet chamber defined therein at the opposite end of the plunger, the housing also having a passage communicating the outlet chamber with the inlet chamber. A valve device is disposed in the passage and openable and closable in response to movement of the plunger. A preloading spring is disposed in the housing for normally urging the plunger in a direction to open the valve device. The housing comprises a cylindrical member having one open end and a cover member closing the open end. A spring seat is disposed in the cylindrical member in engagement with the cover member, the preloading spring acting between the spring seat and the plunger. The spring seat is force-fitted in the inner hole of the housing or in the cover member.
REFERENCES:
patent: 2401856 (1946-06-01), Brock
patent: 4475339 (1984-10-01), Inoue
patent: 4543988 (1985-10-01), Huveteau
Ishiwata Ichiro
Nakagawa Keiji
Nilson Robert G.
Nippon Air Brake Co., Ltd.
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