Flow and pressure control valve system

Details Flow and pressure control valve system Flow and pressure control valve system

1985-08-14

1987-01-13

Schwadron, Martin P.

Fluid handling

Self-proportioning or correlating systems

Supply and exhaust type

137107, 137116, 91461, 192 85R, F16D 2514

Patent

active

046356711

ABSTRACT:
A flow and pressure control valve system is provided in which a control valve body 18 has a bore 22 therein with a slidable piston 24, the piston being biased to the left by spring 32 to a stop 38, with ports 16 and 26 opening to the bore 22 in the pressure end portion of the bore, the port 16 being connected to a positive displacement pump 28 and the port 26 connected to a reservoir 30 through a two-way valve, a third port 40 being connected to an actuatable device 10 and a fourth port 42 being connected to the reservoir 30 and functioning as a pressure regulator port after the two-way valve 28 is closed, and the piston 24 is retracted to the right as in FIG. 2 so that the device 10 is first actuated, and the pressure is then regulated by the relation of the piston 24 to the pressure regulator port 42.

REFERENCES:
patent: 1053382 (1913-02-01), Haennig
patent: 1454409 (1923-05-01), Richter
patent: 1540886 (1925-06-01), Huff
patent: 3272218 (1966-09-01), Johnson
patent: 3335738 (1967-08-01), Christensen et al.
patent: 3606904 (1971-09-01), Taylor
patent: 3696839 (1972-10-01), Irie
patent: 3949847 (1976-04-01), Hoehn
patent: 4281676 (1981-08-01), Morris
patent: 4378816 (1983-04-01), Peiffer
patent: 4531547 (1985-07-01), Hadden

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