Patent US3899135A successfully refreshed from Google Patents.
US3899135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water emitter
Assignee: Brian Edward D O
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Filing: 1973-09-24
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Granted: 1975-08-12
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Expires: 1993-09-24
Abstract
Abstract A water emitter intended for agricultural use can be constructed so as to include an elongated, impervious, resilient tube having a plurality of spaced slits located along its length and a sleeve adjacent to each of said slits. The sleeves fit closely around the tube and are capable of being moved relative to the slits. The relative location between a sleeve and its associated slit determines or regulates the amount the slit will open in response to internal pressure within the tube. The sleeves also reinforce the tube so as to minimize or control the effects of temperature caused changes in the resiliency of the tube.
Inventors
- 👤 Edward D O'brian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:36
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/02; A01G25/023; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882; Y10T137/7884
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A water emitter having an elongated, resilient, imporous tube, the tube having a slit extending along the length thereof, the resiliency of the tube permitting the slit to open in response to internal pressure within the tube and automatically closing off the slit upon the cessation of such internal pressure in which the improvement comprises: a sleeve located around the tube adjacent to the slit, said sleeve being moveable on the tube and fitting closely around the tube so as to be capable of being moved to a position relative to said slit to control the amount that said slit will open in response to internal pressure.
Claim 2
Dependent Claim
107 words
A water emitter having an elongated, resilient, imporous tube, the tube having a slit extending along the length thereof, the resiliency of the tube permitting the slit to open in response to internal pressure within the tube and automatically closing off the slit upon the cessation of such internal pressure in which the improvement comprises: a sleeve located around the tube adjacent to the slit, said sleeve being moveable on the tube and fitting closely around the tube so as to be capable of being moved to a position relative to said slit to control the amount that said slit will open in response to internal pressure.
Claim 3
Dependent Claim
46 words
A water emitter as claimed in claim 1 wherein: said sleeve has a slot formed therein and is capable of being placed on said tube so that said slot is over said slit so that the water emitted from said slit will pass through said slot.
Claim 4
Dependent Claim
44 words
A water emitter as claimed in claim 1 wherein: said tube is formed of a thermoplastic material which changes in resiliency in response to temperature, and said sleeve reinforces said tube so as to control the resiliency of said tube adjacent to said slot.
Claim 5
Dependent Claim
81 words
A water emitter as claimed in claim 1 where: said sleeve has a slot formed therein and is capable of being placed on said tube so that said slot is over said slit so that the water emitted from said slit will pass through said slot. said tube is formed of a thermoplastic material which changes in resiliency in response to temperature, and said sleeve reinforces said tube so as to control the resiliency of said tube adjacent to said slot.
Claim 6
Dependent Claim
68 words
A water emitter as claimed in claim 1 wherein: said tube includes an elongated projection formed along the length of said tube, said slit is in said projection and extends through said projection, said sleeve has a slot formed therein extending along the length of said tube, said sleeve engaging both sides of said projection and being moveable along the length of said projection relative to said slit.
Claim 7
Dependent Claim
43 words
A water emitter as claimed in claim 5 wherein: said tube is formed of a thermoplastic material which changes in resiliency in response to temperature, and said sleeve reinforces said tube so as to control resiliency of said tube adjacent to said slot.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |