Valves and valve actuation – Fluid actuated or retarded – Flexible wall expansible chamber reciprocating valve actuator
Patent
1981-09-28
1983-12-20
Rosenthal, Arnold
Valves and valve actuation
Fluid actuated or retarded
Flexible wall expansible chamber reciprocating valve actuator
251 612, 92 98R, 92128, F16K 31126, F16J 302
Patent
active
044212933
ABSTRACT:
An end cap assembly for a diaphragm type air actuator used selectively to open and close an associated shut-off valve. The assembly includes a cup-shaped nut threadedly received on the outer end of an actuator body. A cap member is received in the nut and includes a central stub extending outwardly therefrom through a central aperture in the nut bottom wall. A conical disc spring is operatively interposed between the nut bottom wall and the cap member so that when the assembly is installed on the actuator body, the disc spring is moved toward a flattened condition and continuously urges the cap member into retaining engagement with the actuator diaphragm. This then provides automatic clamping compensation for the cap member as to variations in the diaphragm thickness due to temperature or other environmental conditions. Both the nut and cap member stub include tool receiving means to facilitate threaded installation of the nut on the actuator body while preventing cap member rotation.
REFERENCES:
patent: 962736 (1910-06-01), Bice
patent: 2437552 (1948-03-01), Quiroz
patent: 3354897 (1967-11-01), Koch et al.
Babuder Gerald A.
Koch Ulrich H.
Rosenthal Arnold
Whitey Co.
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