Pressure reducing valve

Details Pressure reducing valve Pressure reducing valve

1980-07-11

1982-04-13

Weakley, Harold W.

Fluid handling

Line condition change responsive valves

Bi-directional flow valves

303 6C, 1374939, F16K 1726

Patent

active

043242715

ABSTRACT:
Known pressure reducing valves for brake systems of automotive vehicles are provided with a stepped piston and a valve. Upon attainment of the switching pressure the valve is closed and the pressure is reduced at the outlet according to the ratio of surfaces of the stepped piston. These known pressure reducing valves are insecure in their operation, complicated in their structure and expensive in their manufacture. These disadvantages are overcome in accordance with the present invention by providing a valve closing unit including an elastic rubber sealing body disposed at the inlet end of a pressure medium connection in the piston between an inlet chamber and an outlet chamber. When the switching pressure is reached this sealing body closes the pressure medium connection. If the pressure in the outlet chamber is greater then the pressure in the inlet chamber, the sealing body due to its elasticity lifts off the inlet side of the pressure medium connection.

REFERENCES:
patent: 3388950 (1968-06-01), Stelzer
patent: 3463556 (1969-08-01), Kerating
patent: 3492051 (1970-01-01), Kerating
patent: 3508792 (1970-04-01), Bueler

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