Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1983-09-13
1985-04-30
Garrett, Robert E.
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
91 51, 91 52, 91421, 91443, 91454, F16K 31122, F15B 13043
Patent
active
045139431
ABSTRACT:
The servo-motor system is provided with an internal control line which communicates one control valve with a cylinder chamber which is connected to a control valve connected with an external control line. The internal control line permits the second valve to be actuated via the externally controlled control valve.
REFERENCES:
patent: 1948044 (1934-02-01), Myers et al.
patent: 2769912 (1956-11-01), Lupfer et al.
patent: 2928606 (1960-03-01), Lee
patent: 3277791 (1966-10-01), Williams et al.
patent: 3665806 (1972-05-01), Heath
patent: 3818805 (1974-06-01), Johansson
Garrett Robert E.
Li H. Edward
Sulzer Brothers Limited
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