Unloader valve with flow divider

Details Unloader valve with flow divider Unloader valve with flow divider

1974-01-22

1976-02-24

Cohen, Irwin C.

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

137117, G05D 1100

Patent

active

039398595

ABSTRACT:
An unloader valve with flow divider having a fluid pressure source, a first fluid pressure circuit with an accumulator, and a second fluid pressure circuit, comprising a main body having a large diameter cylinder and a small diameter cylinder which are provided as coaxial circles, a spool valve slidably inserted into the large diameter cylinder, a piston slidably inserted into the small diameter cylinder and the spool valve, respectively, a first chamber provided in the large diameter cylinder and fluidly connected with the fluid pressure source, orifice means provided in the spool valve and always fluidly connected with the first chamber, a second chamber provided in the large diameter cylinder and fluidly connected with the first chamber via the orifice means, spring means disposed within the second chamber for biasing the spool valve to the first chamber side, first valve means controlling the communication between the fluid pressure source and the first fluid pressure circuit via the orifice means, and second valve means controlling the communication between the first chamber and the fluid pressure source.

REFERENCES:
patent: 2799996 (1957-07-01), Van Meter
patent: 2818711 (1958-01-01), Lincoln et al.
patent: 2859762 (1958-11-01), Banker
patent: 3011506 (1961-12-01), Schwartz et al.
patent: 3575192 (1971-04-01), MacDuff
patent: 3692039 (1972-09-01), Ewald et al.

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