US3794249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable sprinkler valve
Assignee: Ris Irrigation Systems
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Filing: 1971-09-27
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Granted: 1974-02-26
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Expires: 1991-09-27
Abstract
Abstract A sprinkler head including an adjustable valve with a valve opening and a movable valve means. The valve means includes a gate means movable into and out of the valve opening. The gate means and valve opening form a valve port to control fluid flow at relatively low fluid flow rates. The valve port includes a port perimeter and cross sectional port area in a plane lying generally perpendicular to the flow of fluid. The valve port is varied in size while maintaining a continuous port perimeter with a generally wide cross sectional port area.
Inventors
- 👤 G Lockwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:33
CPC Classifications
B; B05; B05B; B05B1/00; B05B1/26; B05B1/262; B05B1/267; B05B1/30; B05B1/3033; B05B1/304; Y; Y10; Y10S; Y10S239/00; Y10S239/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
An irrigation sprinkler comprising; a fluid inlet in the sprinkler, a fluid passage through the sprinkler for conducting fluid from said fluid inlet to a discharge orifice in the sprinkler, a spray head connected to said sprinkler wherein said discharge orifice is disposed, a reflector surface connected adjacent said discharge orifice, said discharge orifice being located and arranged such that the discharge fluid from said discharge orifice impinges on said reflector surface for the purpose of creating a prescribed pattern of small droplets of fluid, a throttle member of generally cylindrical shape directly connected to said spray head in said fluid passage and axially adjustable in a conforming cylindrical throttle hole, said tHrottle hole being part of said fluid passage, a tapered throttling notch in the cylinderical side of said throttle member to provide a fluid path past said throttle member, and a throttle opening formed by said throttling notch and said throttle hole, said throttle opening being adjustable in size by the axial adjustment of said throttle member, said throttle opening being generally triangular having the lenth of the shortest side of the triangular opening greater than one third the length of the longest side.
Claim 2
Dependent Claim
196 words
An irrigation sprinkler comprising; a fluid inlet in the sprinkler, a fluid passage through the sprinkler for conducting fluid from said fluid inlet to a discharge orifice in the sprinkler, a spray head connected to said sprinkler wherein said discharge orifice is disposed, a reflector surface connected adjacent said discharge orifice, said discharge orifice being located and arranged such that the discharge fluid from said discharge orifice impinges on said reflector surface for the purpose of creating a prescribed pattern of small droplets of fluid, a throttle member of generally cylindrical shape directly connected to said spray head in said fluid passage and axially adjustable in a conforming cylindrical throttle hole, said tHrottle hole being part of said fluid passage, a tapered throttling notch in the cylinderical side of said throttle member to provide a fluid path past said throttle member, and a throttle opening formed by said throttling notch and said throttle hole, said throttle opening being adjustable in size by the axial adjustment of said throttle member, said throttle opening being generally triangular having the lenth of the shortest side of the triangular opening greater than one third the length of the longest side.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |