Patent US3976250A successfully refreshed from Google Patents.
US3976250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Irrigation device
Assignee: Individual
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Filing: 1975-03-07
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Granted: 1976-08-24
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Expires: 1995-03-07
Abstract
Abstract An irrigation system is disclosed which includes a source of fluid under pressure which can be supplied by a pump or from domestic water sources and a system of irrigation pipes which contain a plurality of pressure vessels, the system of irrigation line being controlled by valves. Each of the pressure tanks is connected to the irrigation line by an inlet port containing a check valve means and each of the pressure tanks has an outlet port which is controlled by a diaphragm-type valve, the operator inside of which is connected to the irrigation line. The irrigation line is controlled in such a manner that the tank alternately builds up pressure and the line is reduced in pressure to atmospheric permitting the tank to discharge.
Inventors
- 👤 Harlan A. Bentzinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:12
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
102 words
An irrigation system comprising a supply conduit from a source of fluid under pressure, a control valve in said conduit, at least one pressure tank having an inlet port, said supply conduit connected to said port, a discharge port means connected to said tank, a check valve means between the supply conduit and said inlet port means to said tank, a substantially flat diaphragm control valve having two faces, one face closing the said discharge port and the other face exposed to the supply conduit, said check valve having an opening pressure greater than the closing pressure of said diaphragm control valve.
Claim 2
Dependent Claim
102 words
An irrigation system comprising a supply conduit from a source of fluid under pressure, a control valve in said conduit, at least one pressure tank having an inlet port, said supply conduit connected to said port, a discharge port means connected to said tank, a check valve means between the supply conduit and said inlet port means to said tank, a substantially flat diaphragm control valve having two faces, one face closing the said discharge port and the other face exposed to the supply conduit, said check valve having an opening pressure greater than the closing pressure of said diaphragm control valve.
Claim 3
Dependent Claim
106 words
An irrigation device for the supply of a controlled amount of water from a source to soil comprising a pressure vessel, an opening to said vessel, a conduit from said source to said opening in said vessel, a substantially flat diaphragm control valve having two faces, one face closing the opening and the other face exposed to the supply of water in said conduit, an inlet opening through said diaphragm having a check valve, a source of water in a conduit, said source connected to said inlet opening through said check valve, and an outlet passage communicating with the interior of said vessel through said opening.
Claim 4
Dependent Claim
106 words
An irrigation device for the supply of a controlled amount of water from a source to soil comprising a pressure vessel, an opening to said vessel, a conduit from said source to said opening in said vessel, a substantially flat diaphragm control valve having two faces, one face closing the opening and the other face exposed to the supply of water in said conduit, an inlet opening through said diaphragm having a check valve, a source of water in a conduit, said source connected to said inlet opening through said check valve, and an outlet passage communicating with the interior of said vessel through said opening.
Claim 5
Dependent Claim
18 words
An irrigation device as in claim 2 wherein the check valve in the inlet opening is spring loaded.
Claim 6
Dependent Claim
22 words
An irrigation device as in claim 2 wherein the check valve is a tubular member with a free check ball located therein.
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) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |