Hydraulic modulator valve

Details Hydraulic modulator valve Hydraulic modulator valve

1974-08-09

1976-03-30

Cohen, Irwin C.

Pipes and tubular conduits

With pressure compensators

Variable capacity chambers

60413, 91447, 91468, 138 46, 192109F, 251120, F15B 13042, F16L 5504

Patent

active

039467600

ABSTRACT:
Disclosed herein is a hydraulic modulator valve for a control system of a hydraulically operated mechanism having a casing with a bore therein, a stepped spool axially and slidably engaged within the bore to form an annular fluid throttle passage against the circumference of the bore between a first and a second ports drilled through the casing, and spool actuator for controlling axial displacement of the spool. The stepped spool comprises a large diameter portion to be hermetically engaged within the bore, a small diameter portion and a medium diameter portion in sequence, the throttle passage being formed by the bore and the medium and small portions of the spool.

REFERENCES:
patent: 1871287 (1932-08-01), Whittaker
patent: 2384394 (1945-09-01), Patton
patent: 2402729 (1946-06-01), Buchanan
patent: 3174505 (1965-03-01), Bauer
patent: 3213874 (1965-10-01), Schmiel et al.
patent: 3216444 (1965-11-01), Herner
patent: 3583422 (1968-10-01), Dach et al.
patent: 3656600 (1972-04-01), Kitano et al.

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