Irrigation valve device
First Claim
Patent Images
1. An irrigation valve device comprising:
- a valve;
a swellable member operatively associated with the valve which controls the valve is response to its moisture content and is subjected to water passing through the valve, said valve further comprising;
an insert tip extending below said swellable member for insertion into ground, at least a major portion of the surface of said swellable member being exposed above ground and the remaining portion of the surface of said swellable member directly contacting the ground in accordance with depth of insertion of the inert tip into the ground.
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Abstract
An irrigation valve device including a swellable member and a support therefor permitting moisture to reach the swellable member. Part of the support can be buried in the ground to an adjustable extent to vary the amount of moisture reaching the swellable member. The swellable member acts on irrigating water supply means to control the amount of irrigation water in response to the degree of swelling.
22 Citations
31 Claims
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1. An irrigation valve device comprising:
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a valve; a swellable member operatively associated with the valve which controls the valve is response to its moisture content and is subjected to water passing through the valve, said valve further comprising; an insert tip extending below said swellable member for insertion into ground, at least a major portion of the surface of said swellable member being exposed above ground and the remaining portion of the surface of said swellable member directly contacting the ground in accordance with depth of insertion of the inert tip into the ground. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An irrigation valve device comprising:
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a valve including a perforated sleeve in the form of an acute cone; a swellable member operatively positioned within the valve which controls the valve in response to its moisture content and is subjected to water passing through the valve, said swellable member comprising polyurethane gel wherein at least one portion of the surface of said swellable member is exposed above ground and the remaining portion of the surface of said swellable member directly contacts the ground in accordance with depth of insertion of the valve into the ground. - View Dependent Claims (12, 13, 14, 15)
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16. An irrigation valve device comprising:
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a valve; a swellable member operatively associated with the valve which controls the valve in response to its moisture content and is subjected to water passing through the valve, said swellable member comprising; an elongated porous receiving member with a recess formed in an upper end face portion of said receiving member; and a swellable insert member positioned in said recess formed in said receiving member wherein said swellable insert comprises polyurethane gel and at least one portion of the surface of said swellable member is exposed above ground and the remaining portion of the surface of said swellable member contacts the ground in accordance with depth of insertion of the valve into the ground. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification