Patent US3799441A successfully refreshed from Google Patents.
US3799441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid pellet and self cleaning irrigation device
Assignee: Individual
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Filing: 1973-04-05
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Granted: 1974-03-26
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Expires: 1993-04-05
Abstract
Abstract An irrigation device including a conduit having a plurality of emitters spaced therealong, each emitter being a tubing of relatively small internal diameter relative to that of the conduit, and having a flow interruptive and flow controlling device therein consisting of a flexible longitudinal rib or string having spaced therealong a plurality of transverse baffles.
Inventors
- 👤 W Delmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:59
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/02; A01G25/023
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
208 words
In an irrigation device, the combination of: a feeder tubing adapted to convey irrigation water at a desired pressure and volume for irrigation purposes; a plurality of emitters spaced along the length of said feeder tubing, each of said emitters including a relatively short tube of relatively small internal diameter, one end of which extends into said tubing and the other end of which extends beyond the exterior of said tubing, and a flow controlling device in said tube and consisting of a longitudinally extending member having thereon aplurality a plurality longitudinally spaced transverse baffle elements each of which is at least partially circular, the external diameter of the circular portion of each baffle element being slightly less than the internal diameter of said tube to provide a small clearance therebetween and a loose fit of the flow controlling device within said tube to permit the shape of said clearance to alter in response to a flow of water through said tube, each of said members being flexible to permit the flexing thereof between said baffle elements and the movement of the member as a whole, and each said tube having restraining means for restraining its said member against movement out of said other end of said tube.
Claim 2
Dependent Claim
208 words
In an irrigation device, the combination of: a feeder tubing adapted to convey irrigation water at a desired pressure and volume for irrigation purposes; a plurality of emitters spaced along the length of said feeder tubing, each of said emitters including a relatively short tube of relatively small internal diameter, one end of which extends into said tubing and the other end of which extends beyond the exterior of said tubing, and a flow controlling device in said tube and consisting of a longitudinally extending member having thereon aplurality a plurality longitudinally spaced transverse baffle elements each of which is at least partially circular, the external diameter of the circular portion of each baffle element being slightly less than the internal diameter of said tube to provide a small clearance therebetween and a loose fit of the flow controlling device within said tube to permit the shape of said clearance to alter in response to a flow of water through said tube, each of said members being flexible to permit the flexing thereof between said baffle elements and the movement of the member as a whole, and each said tube having restraining means for restraining its said member against movement out of said other end of said tube.
Claim 3
Dependent Claim
22 words
A device as defined in claim 1 in which each of said baffles has one face generally frustoconical in longitudinal cross section.
Claim 4
Dependent Claim
45 words
A device as defined in claim 1 in which said restraining means is a bundle of fibers adjacent the outer end of said tube and fixed thereto to act as a barrier to the entrance of foreign materials into said tube from the exterior thereof.
Claim 5
Dependent Claim
32 words
A device as defined in claim 3 in which said bundle of fibers extends through said flow control device to secure it relative to said tube but permitting relatively small movement therebetween.
Claim 6
Dependent Claim
58 words
A device as defined in claim 3 in which said bundle of fibers has a free flexible end which serves as a flapper check valve, movable away from said tube to permit liquid flow therefrom but closing the end of said tube upon a cessation of said flow to prevent the entrance of foreign materials into said tube.
Claim 7
Dependent Claim
160 words
In an emitter for an irrigation system, the combination of: a tube having a relatively small internal diameter and a length at least five times said internal diameter; and a flow controlling device in said tube and consisting of a longitudinally extending member having thereon a plurality of longitudinally spaced transverse baffle elements each of which is at least partially circular, the external diameter of the circular portion of each baffle element being slightly less than the internal diameter of said tube to provide a small clearance therebetween and a loose fit of the flow controlling device within said tube to permit the shape of said clearance to alter in response to a flow of water through said tube, said member being flexible to permit the flexing thereof between said baffle elements and the movement of the member as a whole, and said tube having restraining means for restraining said member against movement out of one end of said tube.
Claim 8
Dependent Claim
160 words
In an emitter for an irrigation system, the combination of: a tube having a relatively small internal diameter and a length at least five times said internal diameter; and a flow controlling device in said tube and consisting of a longitudinally extending member having thereon a plurality of longitudinally spaced transverse baffle elements each of which is at least partially circular, the external diameter of the circular portion of each baffle element being slightly less than the internal diameter of said tube to provide a small clearance therebetween and a loose fit of the flow controlling device within said tube to permit the shape of said clearance to alter in response to a flow of water through said tube, said member being flexible to permit the flexing thereof between said baffle elements and the movement of the member as a whole, and said tube having restraining means for restraining said member against movement out of one end of said tube.
Claim 9
Dependent Claim
23 words
A device as defined in claim 6, in which said flow controlling device is formed from a synthetic plastic material and is deformable.
Claim 10
Dependent Claim
21 words
A device as defined in claim 6, in which said flow controlling device is a rod having thereon said baffle elements.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |