US3903929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Irrigation conduit
Assignee: Pymah Corp
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Filing: 1971-11-10
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Granted: 1975-09-09
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Expires: 1991-11-10
Abstract
Abstract An irrigation conduit may be formed by extruding a flexible, imporous polymer in the form of a structure having first and second integral tubes connected by a common wall separating their interiors. A first series of holes extends through the common wall so as to connect the interiors of the tubes. A second series of holes connects the interior of the second tube with the exterior of the conduit. When water under pressure is supplied to the interior of the first tube, it is distributed to the interior of the second tube with a drop in the pressure. Water reaching the interior of the second tube is then distributed to the exterior of the conduit through the holes of the second series.
Inventors
- 👤 Donald E Mock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:19
CPC Classifications
F; F16; F16L; F16L11/00; F16L11/04; F16L11/12; F16L11/121; A; A01; A01G; A01G25/00; A01G25/06; F16L9/00; F16L9/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
296 words
An irrigation conduit which comprises: first and second seamless, integral tubes of a flexible imporous, polymer material, said first tube having a circular cross-sectional configuration when subjected to water pressure, said tubes having a uniform cross-sectional configuration along their length, said tubes having a common wall separating their interiors serving as a wall for both of their interiors, said second tube having a non-circular cross-sectional configuration and including a wall extending outwardly from said first tube which is attached to said first tube at the opposed edges of said common wall, a first series of holes of uniform diameter uniformly spaced from one another in said common wall placing the interiors of said tubes in communication with one another. a second series of holes of uniform diameter uniformly spaced from one another in said second tube leading from the interior of said second tube to the exterior of said conduit, said first tube being capable of receiving water under pressure and distributing it to the interior of the second tube through said holes of said first series, said holes of said first series being sufficiently small so as to cause a pressure drop as water is distributed from the interior of said first tube to the interior of said second tube, said holes in said second tube being capable of distributing water from the interior of said second tube to the exterior of said conduit, the totle area of said holes of said second series being greater than the total area of said holes of said first series so that water can escape more easily from the interior of said second tube to the exterior of said conduit than water can flow from the interior of said first tube to the interior of said second tube.
Claim 2
Dependent Claim
296 words
An irrigation conduit which comprises: first and second seamless, integral tubes of a flexible imporous, polymer material, said first tube having a circular cross-sectional configuration when subjected to water pressure, said tubes having a uniform cross-sectional configuration along their length, said tubes having a common wall separating their interiors serving as a wall for both of their interiors, said second tube having a non-circular cross-sectional configuration and including a wall extending outwardly from said first tube which is attached to said first tube at the opposed edges of said common wall, a first series of holes of uniform diameter uniformly spaced from one another in said common wall placing the interiors of said tubes in communication with one another. a second series of holes of uniform diameter uniformly spaced from one another in said second tube leading from the interior of said second tube to the exterior of said conduit, said first tube being capable of receiving water under pressure and distributing it to the interior of the second tube through said holes of said first series, said holes of said first series being sufficiently small so as to cause a pressure drop as water is distributed from the interior of said first tube to the interior of said second tube, said holes in said second tube being capable of distributing water from the interior of said second tube to the exterior of said conduit, the totle area of said holes of said second series being greater than the total area of said holes of said first series so that water can escape more easily from the interior of said second tube to the exterior of said conduit than water can flow from the interior of said first tube to the interior of said second tube.
Claim 3
Dependent Claim
44 words
An irrigation conduit as claimed in claim 1 wherein: all of said holes in both of said series are of the same diameter and, there are more of said holes of said second series than there are of said holes of said first series.
Claim 4
Dependent Claim
65 words
An irrigation conduit as claimed in claim 1 wherein: all of said holes in both of said series are of the same diameter and have continuous, smooth curved walls, and there are more of said holes of said second series than there are of said holes of said first series, the holes of said second series are offset from the holes of said first series.
Claim 5
Dependent Claim
24 words
An irrigation conduit as claimed in claim 1 wherein: the holes of said second series are offset from the holes of said first series.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |