Fluid handling – Self-proportioning or correlating systems – Self-proportioning flow systems
Patent
1981-04-02
1986-09-16
Nilson, Robert G.
Fluid handling
Self-proportioning or correlating systems
Self-proportioning flow systems
91446, 137460, F15B 1108
Patent
active
046116206
ABSTRACT:
A hydraulic circuit breaker for use with a hydraulic device comprising a body having a supply conduit for supplying hydraulic fluid under pressure to the hydraulic device and a return conduit for carrying hydraulic fluid away from the hydraulic device. A slide valve is mounted for movement in a first chamber of the body to define a supply orifice of variable area in the supply passage and a return orifice of variable area in the return passage. The slide valve is positioned in the body as a function of the pressure drop across at least one of the orifices. A pressure responsive member is mounted for movement in the body and moves in response to the pressure drop across the supply orifice reaching a predetermined value. A movable drive member extends into both of the chambers so that it can transmit at least some of the motion of the pressure responsive member to the slide valve to move the slide valve to close the supply and return orifices.
REFERENCES:
patent: 2744533 (1956-05-01), Parker
patent: 3420265 (1969-01-01), De Pauw
patent: 3502102 (1970-03-01), Maltby
patent: 3568705 (1971-03-01), Boyadjeff
patent: 3587393 (1971-06-01), Vick
patent: 3685531 (1972-08-01), Byford
patent: 4274328 (1981-06-01), Pederson
Nilson Robert G.
Parker Hannifin Corporation
Peterson Gordon L.
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