Pop-up sprinkler with improved inlet valve
First Claim
1. A pop-up irrigation sprinkler having a below surface inlet and a diaphragm valve operatively disposed in a vertical orientation in said inlet, said diaphragm valve being of the type having a sealing core and a cylindrical belows in encircling relation thereabout operatively effective to be urged in opposite directions between a clearance position spaced from said sealing core and a contact position therewith for opening and closing said inlet, whereby said bellows movement opening said inlet is not in opposition to the directional flow therethrough and contributes to minimal pressure loss in said flow.
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Accused Products
Abstract
A pop up sprinkler utilizes a diaphragm valve oriented in a vertical manner within the sprinkler water inlet. The valve has a circular bellows surrounding a core and is movable between an expanded position embracing the core and a relaxed position displaced from the core. In the displaced position water flow through the sprinkler is allowed, such flow passing about the core in a manner which creates minimal pressure loss in the valve.
38 Citations
3 Claims
- 1. A pop-up irrigation sprinkler having a below surface inlet and a diaphragm valve operatively disposed in a vertical orientation in said inlet, said diaphragm valve being of the type having a sealing core and a cylindrical belows in encircling relation thereabout operatively effective to be urged in opposite directions between a clearance position spaced from said sealing core and a contact position therewith for opening and closing said inlet, whereby said bellows movement opening said inlet is not in opposition to the directional flow therethrough and contributes to minimal pressure loss in said flow.
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3. A method of irrigating a golf course or the like using a sprinkler having a bellows inlet valve comprising the steps of normally closing a vertically oriented bellows against a centrally located sealing core of said valve so as to bound a holding chamber for water upstream of said sealing core and bellows, filling said holding chamber with water, and releasing said water for vertical flow through said sprinkler by laterally contracting said bellows from said normally closed position against said sealing core, whereby said water flows in substantially straight paths past said sealing core through said sprinkler.
Specification