Valves and valve actuation – Fluid actuated or retarded – Pilot or servo type motor
Patent
1991-04-01
1992-06-30
Rosenthal, Arnold
Valves and valve actuation
Fluid actuated or retarded
Pilot or servo type motor
251 41, 251 45, 251 3005, 4406, 4DIG3, F16K 3140, E03D 510
Patent
active
051256215
ABSTRACT:
A replacement apparatus (50) for converting a manual flush mechanism to automatic operation includes a partition base (76) secured to a replacement cap (68) that forms two spaced-apart openings (96 and 98). A valve operator (58) is so mounted on the replacement cap (68) as to form with the upper surface of the replacement cap (68) a chamber (100) with which both of the openings (96 and 98) communicate. The partition base (76) separates a pilot chamber (26) from a relief chamber (94) that the partition base (76) and replacement cap (68) form. A replacement pilot valve member (102) controlled by the valve operator (58) in turn controls flow through the passage that comprises the openings (96 and 98) and the common chamber (100) with which they communicate. It thereby controls flow between the pilot chamber (26) and the relief chamber (94). The partition base (76) includes a wall (86 ) that is flexible so as to permit a main valve diaphragm (24) to flex. This organization permits the operator stroke to be much shorter than the flexure displacement of the center of the main diaphragm (24).
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Novak Joel S.
Parsons Natan E.
Recurrent Solutions Limited Partnership
Rosenthal Arnold
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