Hydraulic valves

Details Hydraulic valves Hydraulic valves

1980-07-24

1983-11-08

Walton, George L.

Fluid handling

Line condition change responsive valves

Pilot or servo controlled

1374875, 251 30, F16K 31122, F16K 3102

Patent

active

044136480

ABSTRACT:
A pilot actuated hydraulic control valve has a flow setting member in the form of a valve piston an end of which co-operates with radial outlet ports of the valve to form a variable metering orifice. A flow sensor provides a feedback differential pressure proportional to the flow through the valve and that feedback differential is used to control a pilot stage which actuates the flow setting member.

REFERENCES:
patent: 2582088 (1952-01-01), Walthers
patent: 2655940 (1953-10-01), Jackson
patent: 2771062 (1956-11-01), Hayner
patent: 2984251 (1961-05-01), Quinby
patent: 3033228 (1962-05-01), Mohler
patent: 3252477 (1966-05-01), Chard
patent: 3732887 (1973-05-01), Hayner
patent: 4014509 (1977-03-01), Yoshino et al.
patent: 4201116 (1980-05-01), Martin
patent: 4236690 (1980-12-01), Smilges et al.

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