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US3866833A
Expired / Lapsed
US
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Irrigation hose
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1973-09-17
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Granted: 1975-02-18
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Expires: 1993-09-17
Abstract
Abstract An irrigation hose for agriculture comprises a plastic pipe having a plurality of flow paths each partitioned independently by diaphragm and extending longitudinally. That portion of an outer wall of the plastic pipe which defines at least one of the flow paths is formed with small bores properly spaced for sprinkler use along its length. Said at least one of the flow paths serves as a constant pressure path while at least one of other flow paths which are separated from the constant pressure path by the diaphragm serves as a supply path. Small bores communicating both the constant pressure path and the supply path are formed in the diaphragm separating the both paths along its length. In a modification of the present invention, the diaphragm is helically formed. The irrigation hose of the present invention is characterized by a constant amount of water sprinkled irrespective of the distance from a water supply.
Inventors
- 👤 Osamu Shibata
- 👤 Susumu Kojimoto
- 👤 Takeshi Okuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:12
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
111 words
An irrigation hose for agriculture comprising a plastic pipe having a plurality of flow paths each partitioned independently by diaphragms helically formed and extending longitudinally, that portion of an outer wall of the plastic pipe which defines at least one of the flow paths being formed with small bores properly spaced for sprinkler use along its length, and serving as a constant pressure path while at least one of the other flow paths, separated from the constant pressure path by the diaphragm, serves as a supply path, and small bores communicating both the constant pressure path and the supply path formed in the diaphragm separating the both paths along its length.
Claim 2
Dependent Claim
111 words
An irrigation hose for agriculture comprising a plastic pipe having a plurality of flow paths each partitioned independently by diaphragms helically formed and extending longitudinally, that portion of an outer wall of the plastic pipe which defines at least one of the flow paths being formed with small bores properly spaced for sprinkler use along its length, and serving as a constant pressure path while at least one of the other flow paths, separated from the constant pressure path by the diaphragm, serves as a supply path, and small bores communicating both the constant pressure path and the supply path formed in the diaphragm separating the both paths along its length.
Claim 3
Dependent Claim
120 words
An irrigation hose for agriculture comprising a plastic pipe having a plurality of flow paths each partitioned independently by longitudinally extending diaphragms, that portion of an outer wall of the plastic pipe which defines at least one of the flow paths being formed with small bores properly spaced for sprinkler use along its length and serving as a constant pressure path while two of the other flow paths which are separated from the constant pressure path by the diaphragm, serve as supply paths, small bores communicating both the supply paths to the constant pressure path so that different kinds of liquids can be passed independently each through the supply paths and joined and mixed together in the constant pressure path.
Claim 4
Dependent Claim
120 words
An irrigation hose for agriculture comprising a plastic pipe having a plurality of flow paths each partitioned independently by longitudinally extending diaphragms, that portion of an outer wall of the plastic pipe which defines at least one of the flow paths being formed with small bores properly spaced for sprinkler use along its length and serving as a constant pressure path while two of the other flow paths which are separated from the constant pressure path by the diaphragm, serve as supply paths, small bores communicating both the supply paths to the constant pressure path so that different kinds of liquids can be passed independently each through the supply paths and joined and mixed together in the constant pressure path.
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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |