Fluid handling – Systems – Line condition change responsive release of valve
Patent
1975-06-04
1977-09-06
Cohan, Alan
Fluid handling
Systems
Line condition change responsive release of valve
91433, 13762564, 13762566, 13762569, 251 30, 251 31, F15B 13043
Patent
active
040461653
ABSTRACT:
Valve-positioning apparatus especially adapted for use with fluid-operated spool valves for positioning the spool member of such a valve in a predetermined position whenever the valve is not operating such as upon installation or during shutdown. In the preferred embodiment, the positioning apparatus includes a piston member normally held out of contact with the spool by fluid pressure but urged into contact with the spool to position the spool when fluid pressure fails or is absent. The positioning apparatus may be used on either or both ends of the spool valve.
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McClelland Harold H.
Rose, Sr. Robert C.
Cohan Alan
Ibec Industries, Inc.
Michalsky Gerald A.
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