Flush system

Details Flush system Flush system

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).

REFERENCES:
patent: 4191091 (1979-02-01), Pulvari
patent: 4309781 (1982-01-01), Lissau
patent: 4611356 (1986-09-01), Lin
patent: 4709427 (1987-12-01), Laverty, Jr.
patent: 4729342 (1988-03-01), Loctin
patent: 4756031 (1988-07-01), Barrett
patent: 4793588 (1988-12-01), Laverty, Jr.
patent: 4805247 (1989-02-01), Laverty, Jr.
patent: 4823414 (1989-04-01), Piersimoni et al.
patent: 4891864 (1990-01-01), Laverty, Jr.
patent: 4941215 (1990-07-01), Liu

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