Irrigation control valve and screen
First Claim
1. A sprinkler control valve, comprising:
- a housing having an inlet for connecting to a source of water, an outlet for connection to a distribution line for distributing water to a sprinkler unit, a passage connecting said inlet to said outlet;
a valve seat in said passage;
a pressure responsive diaphragm valve formed with a valve disc having a front face and a back face mounted in said passage for engagement with said valve seat, and a pilot passage between said front face and said back face;
a friction plate on said back face; and
a screen plate on said front face of said valve member, said screen plate having a generally cup shape with a circular disc and a circular peripheral wall extending outward from said disc and screen openings through said plate at a corner edge of said plate at the juncture of said disc and said wall and communicating with said pilot passage from said front face of said valve to a back of said diaphragm.
1 Assignment
0 Petitions
Accused Products
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.
56 Citations
20 Claims
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1. A sprinkler control valve, comprising:
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a housing having an inlet for connecting to a source of water, an outlet for connection to a distribution line for distributing water to a sprinkler unit, a passage connecting said inlet to said outlet; a valve seat in said passage; a pressure responsive diaphragm valve formed with a valve disc having a front face and a back face mounted in said passage for engagement with said valve seat, and a pilot passage between said front face and said back face; a friction plate on said back face; and a screen plate on said front face of said valve member, said screen plate having a generally cup shape with a circular disc and a circular peripheral wall extending outward from said disc and screen openings through said plate at a corner edge of said plate at the juncture of said disc and said wall and communicating with said pilot passage from said front face of said valve to a back of said diaphragm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A pilot operated irrigation control valve, comprising:
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a housing having an inlet for connecting to a source of water, and an outlet for distributing water out from said housing, a passage connecting said inlet to said outlet; a valve seat in said passage between said inlet and said outlet; a pressure responsive diaphragm valve assembly comprising a generally circular diaphragm having a valve disc formed therein proximate the center thereof, said valve disc having a front face and a back face, said diaphragm mounted in said passage for engagement of said front face with said valve seat, and a pilot passage between said front face and said back face; a friction plate on said back face; and a screen plate on said front face of said valve member, said screen plate having a cup shape with a bottom and peripheral wall and screen openings through said plate at a corner edge defined by a juncture of said bottom and peripheral wall and communicating with said pilot passage from said front face of said valve to a back of said diaphragm. - View Dependent Claims (13, 14, 15, 16)
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17. A diaphragm control valve assembly, comprising:
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a unitary generally circular diaphragm having an annular flexible membrane and a valve disc formed proximate the center thereof, said valve disc having a front face and a back face, said diaphragm adapted to be mounted in a housing for engagement of said front face with a valve seat, and a pilot passage between said front face and said back face; a friction plate directly engaging said back face having an elongated passage communicating with said pilot passage; and a screen plate on said front face of said valve member, said screen plate having a cup shape defined by a generally circular disc and outer peripheral cylindrical walls, and having screen openings through said plate at a corner edge formed at the juncture of said circular disc and outer peripheral cylindrical walls, said screen openings communicating with said pilot passage from said front face of said valve to a back of said diaphragm. - View Dependent Claims (18, 19, 20)
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Specification