Valves and valve actuation – Fluid actuated or retarded – Piston type expansible chamber reciprocating valve actuator
Reexamination Certificate
2006-06-30
2010-06-08
Fristoe, Jr, John K (Department: 3753)
Valves and valve actuation
Fluid actuated or retarded
Piston type expansible chamber reciprocating valve actuator
C251S062000, C251S279000, C251S305000
Reexamination Certificate
active
07731152
ABSTRACT:
An apparatus is provided for a valve actuator assembly comprising an actuator housing, a piston, and a spring. The piston is disposed within the actuator housing. The piston is configured to couple to a valve element, and includes an inner cylindrical section and an outer cylindrical section. The outer cylindrical section of the piston is spaced apart from the inner cylindrical section to define a recess. The piston is further configured to move within the actuator housing in a first direction and a second direction, to thereby move the valve element toward a first position and a second position, respectively. The spring is disposed within the actuator housing, and is configured to supply a bias force that urges the piston to move in the first direction. The spring is at least partially disposed within the recess, and at least partially surrounding the inner cylindrical section.
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European Search Report dated Oct. 10, 2008.
Abel Micah S.
Dorste Craig T.
Gutierrez Javier
Kesner Charles E.
Fristoe, Jr John K
Honeywell International , Inc.
Ingrassia Fisher & Lorenz P.C.
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