Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1979-07-09
1981-12-08
Chambers, A. Michael
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
251 30, 91 51, 91459, F16K 3112, F15B 1302, F15B 13044
Patent
active
043043895
ABSTRACT:
Apparatus including a manually operated electrical switch operably connected through electrical and pneumatic systems to a hydraulic system for remote manual control of hydraulically actuated devices, such as hydraulically actuated throttling valves. The apparatus is particularly useful as a remote manual override for malfunctioning automatic hydraulic controllers.
REFERENCES:
patent: 2969808 (1961-01-01), Horlacher
patent: 2970575 (1961-02-01), Stern
patent: 3370513 (1968-02-01), Shore
patent: 3509915 (1970-05-01), Janshen et al.
patent: 3698580 (1972-10-01), Carlson et al.
patent: 3721357 (1973-03-01), Williamson
patent: 3964518 (1976-06-01), Hesse et al.
patent: 4143851 (1979-03-01), Lange
Chambers A. Michael
Farrell Daniel R.
Sandford Dean
Thompson Alan H.
Union Oil Company of California
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