US3604728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drip level irrigation
Assignee: Individual
•
Filing: 1969-09-25
•
Granted: 1971-09-14
•
Expires: 1989-09-25
Abstract
Abstract An irrigation dripper unit for use in irrigation in association with an irrigation supply pipe and also, when combined with a supply pipe, to form together with the supply pipe an integral unit. The dripper unit can be connected in series with the supply pipe or, when constituting a part of the integral unit, is connected in series with the supply pipe and has means to tap off a portion of the water flowing through the unit and to discharge such portion at a low drip rate.
Inventors
- 👤 Blass Symcha
- 👤 Ishajahu Blass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:44
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/02; A01G25/023; F; F16; F16L; F16L55/00; A01G25/006; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
237 words
An irrigation dripper unit to connect adjacent pipeline sections, comprising an outer tubular member and an inner tubular member, each having first and second opposite end portions, said inner tubular member being axially slidable into said outer tubular member, means retaining said inner tubular member within the outer tubular member, the first end portion of the outer tubular member being disposed adjacent and projecting beyond the second end portion of the inner tubular member, the first end portion of the inner tubular member being disposed adjacent and projecting beyond the second end portion of the outer tubular member, said first end portions of said tubular members serving to connect adjacent pipeline sections, a continuous elongated helical groove formed in the surface of one of the tubular members and defining a continuous conduit with respect to the contiguous surface of the other tubular member, one end of said helical conduit being disposed adjacent the second end portion of the inner tubular member and defining an inlet communicating with the interior of said inner tubular member, at least one port defining an outlet formed in said unit adjacent to and communicating with the opposite end of the helical conduit and the exterior of said unit whereby said conduit defines a continuously open path to the exterior of the unit, for flow of a portion of the fluid that may be flowing through the interior of said inner tubular member.
Claim 2
Dependent Claim
237 words
An irrigation dripper unit to connect adjacent pipeline sections, comprising an outer tubular member and an inner tubular member, each having first and second opposite end portions, said inner tubular member being axially slidable into said outer tubular member, means retaining said inner tubular member within the outer tubular member, the first end portion of the outer tubular member being disposed adjacent and projecting beyond the second end portion of the inner tubular member, the first end portion of the inner tubular member being disposed adjacent and projecting beyond the second end portion of the outer tubular member, said first end portions of said tubular members serving to connect adjacent pipeline sections, a continuous elongated helical groove formed in the surface of one of the tubular members and defining a continuous conduit with respect to the contiguous surface of the other tubular member, one end of said helical conduit being disposed adjacent the second end portion of the inner tubular member and defining an inlet communicating with the interior of said inner tubular member, at least one port defining an outlet formed in said unit adjacent to and communicating with the opposite end of the helical conduit and the exterior of said unit whereby said conduit defines a continuously open path to the exterior of the unit, for flow of a portion of the fluid that may be flowing through the interior of said inner tubular member.
Claim 3
Dependent Claim
25 words
An irrigation dripper unit according to claim 1 and furthermore comprising pipeline sections respectively formed integrally with said first end portions of said tubular members.
Claim 4
Dependent Claim
212 words
A combined pipeline section and irrigation dripper unit comprising a pipeline section, an outer tubular member, a first end portion of said outer tubular member being formed integrally with one end of the pipeline section, an inner tubular member, a first end portion of the inner tubular member being formed integrally with the other end of the pipeline section, a continuous elongated helical groove formed in the surface of one of the tubular members of the unit, said inner tubular member being axially slidable into said outer tubular member, means retaining the inner tubular member associated with one pipeline section within the outer tubular member associated with a succeeding pipeline section so as to constitute an irrigation dripper unit, contiguous surfaces of the two tubular members defining between them a continuous elongated helical conduit, one end of said conduit communicating with an adjacent pipe secton and defining an inlet and at least one port defining an outlet formed in said unit adjacent to and communicating with the opposite end of the conduit and the exterior of said unit whereby said conduit defines a continuously open path to the exterior of the unit, for flow of a portion of the fluid that may be flowing through the interior of said inner tubular member.
Claim 5
Dependent Claim
212 words
A combined pipeline section and irrigation dripper unit comprising a pipeline section, an outer tubular member, a first end portion of said outer tubular member being formed integrally with one end of the pipeline section, an inner tubular member, a first end portion of the inner tubular member being formed integrally with the other end of the pipeline section, a continuous elongated helical groove formed in the surface of one of the tubular members of the unit, said inner tubular member being axially slidable into said outer tubular member, means retaining the inner tubular member associated with one pipeline section within the outer tubular member associated with a succeeding pipeline section so as to constitute an irrigation dripper unit, contiguous surfaces of the two tubular members defining between them a continuous elongated helical conduit, one end of said conduit communicating with an adjacent pipe secton and defining an inlet and at least one port defining an outlet formed in said unit adjacent to and communicating with the opposite end of the conduit and the exterior of said unit whereby said conduit defines a continuously open path to the exterior of the unit, for flow of a portion of the fluid that may be flowing through the interior of said inner tubular member.
Claim 6
Dependent Claim
40 words
A combination according to claim 3 wherein said connecting means is formed of alternating recesses and slots formed peripherally in the second end portion of the outer tubular member and projections formed in corresponding positions of the inner tubular members.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |