Valves and valve actuation – Fluid actuated or retarded – Flexible wall expansible chamber reciprocating valve actuator
Reexamination Certificate
2006-07-17
2009-06-30
Fristoe, Jr., John K (Department: 3753)
Valves and valve actuation
Fluid actuated or retarded
Flexible wall expansible chamber reciprocating valve actuator
C251S331000
Reexamination Certificate
active
07552906
ABSTRACT:
There is provided a valve assembly with an inlet passage and an outlet passage in communication with a valve chamber, a diaphragm mounted at the valve chamber for movement between a closed position, substantially preventing the flow of fluid from the inlet passage to the outlet passage, and an opened position, defining a path of fluid flow between the inlet passage and the outlet passage, and a pressure chamber disposed in the valve chamber above the diaphragm for retaining fluid pressure to control the diaphragm position. The valve assembly provides improved support for the diaphragm at an outlet aperture of the pressure chamber, air bleed from the pressure chamber, and upstream shutoff.
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Irwin Kevin M.
Skripkar Kenneth J.
Fitch Even Tabin & Flannery
Fristoe, Jr. John K
Rain Bird Corporation
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