US3736755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Irrigation system
Assignee: Individual
•
Filing: 1972-02-23
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Granted: 1973-06-05
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Expires: 1992-02-23
Abstract
Abstract The invention relates to a distribution system for subsurface or trickle irrigation of arid land using plastic pipe with spaced wall slits therein. Spring clips encircle the pipe at each slit to define pressure-initiated opening of each slit and the subsequent closure thereof. The pressure of the system may be increased to bring about opening of the slits with the resultant exit of water from each slit. More uniform water distribution results from use of this system and longer runs of piping may be used. Also, occasional application of higher pressure minimizes blockage of the slits by foreign particles.
Inventors
- 👤 R Hammond
- 👤 J Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:04
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/02; A01G25/023; E; E02; E02B; E02B13/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
217 words
An improved system for the irrigation of arid land comprising a source of water; an elongated, hollow header coupled to said water source; a plurality of hollow, elongated, lateral lines coupled to and in communication with said header, each of said lateral lines provided with a plurality of spaced-apart and normally closed slits; a plurality of spring clips encompassing each of said lateral lines with respective ones of said clips encompassing each of respective ones of said slits in said lines, each of said clips having each end thereof slightly curved away from the associated lateral line; means for supplying water from said source to said header and to the associated lateral lines at some selected pressure value; all of said clips being identical and all of them having the same spring constant, said spring clips maintaining said respective slits closed in the absence of water pressure to said lateral lines, whereby when said selected pressure value is applied to said header and to said lateral lines, said spring constant of each of said clips is overcome to open all of said slits substantially simultaneously thereby effecting a substantially uniform distribution of water through all of said lateral line slits for the effective uniform irrigation of said land with which said header and lateral lines are associated.
Claim 2
Dependent Claim
217 words
An improved system for the irrigation of arid land comprising a source of water; an elongated, hollow header coupled to said water source; a plurality of hollow, elongated, lateral lines coupled to and in communication with said header, each of said lateral lines provided with a plurality of spaced-apart and normally closed slits; a plurality of spring clips encompassing each of said lateral lines with respective ones of said clips encompassing each of respective ones of said slits in said lines, each of said clips having each end thereof slightly curved away from the associated lateral line; means for supplying water from said source to said header and to the associated lateral lines at some selected pressure value; all of said clips being identical and all of them having the same spring constant, said spring clips maintaining said respective slits closed in the absence of water pressure to said lateral lines, whereby when said selected pressure value is applied to said header and to said lateral lines, said spring constant of each of said clips is overcome to open all of said slits substantially simultaneously thereby effecting a substantially uniform distribution of water through all of said lateral line slits for the effective uniform irrigation of said land with which said header and lateral lines are associated.
Claim 3
Dependent Claim
47 words
The system set forth in claim 1, and further including a timed, hydraulic pulser coupled to said header and thus to said lateral lines to provide pulses of an additional pressure at selected time intervals for providing a periodic cleaning or flushing action at each slit opening.
Claim 4
Dependent Claim
22 words
The system set forth in claim 1, wherein said header and lateral lines are plastic and are placed underground for sub-surface irrigation.
Claim 5
Dependent Claim
51 words
The system set forth in claim 1, wherein said header and lateral lines are plastic and are placed on the ground surface for trickle irrigation, said system further including a mulch flap attached to and completely covering each of said lateral lines with the slits of each lateral line oriented downward.
References Cited (Backward Citations)
US544069A
Cited
US2064695A
Cited
US2446571A
Cited
GB884564A
Cited
US3068616A
Cited
US3080124A
Cited
US3518831A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |