Irrigation control valve and screen

Details Irrigation control valve and screen Irrigation control valve and screen

1996-11-14

1999-11-09

Walton, George L.

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

137549, 251 3005, 251 46, F16K 31122, F16K 3142

Patent

active

059798637

ABSTRACT:
A control valve comprises a housing having an inlet for connecting to a source of water and an outlet, a pressure responsive diaphragm valve assembly including a valve disc having a front face and a back face mounted in the passage for engagement with the valve seat, and a pilot passage between the front face and the back face, a friction plate on the back face, and a screen plate on the front face of the valve member, the screen plate having a cup shape and screen openings at a corner edge of the disc communicating with the pilot passage from the front face of the valve to a back of the diaphragm for controlling the rate of opening of the valve for controlling flow of fluid through the valve to the sprinkler unit.

REFERENCES:
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patent: 4081171 (1978-03-01), Morgan et al.
patent: 4107043 (1978-08-01), McKinney
patent: 4135696 (1979-01-01), Saarem et al.
patent: 4180236 (1979-12-01), Saarem et al.
patent: 4360037 (1982-11-01), Kendall
patent: 4508136 (1985-04-01), Kah, Jr.
patent: 4740302 (1988-04-01), Rosenberg
patent: 4751000 (1988-06-01), Drori
patent: 4893645 (1990-01-01), Augustinas et al.
patent: 4966702 (1990-10-01), Drori
patent: 5100550 (1992-03-01), Brulhart
patent: 5133382 (1992-07-01), Nielsen
patent: 5213124 (1993-05-01), Costa

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