Patent US4273580A successfully refreshed from Google Patents.
Patent US3887139A successfully refreshed from Google Patents.
US3887139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trickle irrigation emitter
Assignee: Illinois Tool Works Inc
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Filing: 1974-05-17
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Granted: 1975-06-03
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Expires: 1994-05-17
Abstract
Abstract An emitter for a trickle irrigation system comprising a housing defining a chamber, and inlet and outlet ports opening into the chamber, and a substantial length of fine diameter tubing which lies within the chamber and connects to one only of the said inlet and outlet ports.
Inventors
- 👤 Denis N Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:22
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/02; A01G25/023
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
69 words
An emitter for a trickle irrigation system comprising a housing defining a chamber and inlet and outlet ports opening into the chamber, and a substantial length of fine diameter tubing which has freedom to move in said chamber in response to flucuations of the pressure of fluid flowing through said tube and which lies within said chamber and connects to one only of the said inlet and outlet ports.
Claim 2
Dependent Claim
69 words
An emitter for a trickle irrigation system comprising a housing defining a chamber and inlet and outlet ports opening into the chamber, and a substantial length of fine diameter tubing which has freedom to move in said chamber in response to flucuations of the pressure of fluid flowing through said tube and which lies within said chamber and connects to one only of the said inlet and outlet ports.
Claim 3
Dependent Claim
69 words
An emitter for a trickle irrigation system comprising a housing defining a chamber and inlet and outlet ports opening into the chamber, and a substantial length of fine diameter tubing which has freedom to move in said chamber in response to flucuations of the pressure of fluid flowing through said tube and which lies within said chamber and connects to one only of the said inlet and outlet ports.
Claim 4
Dependent Claim
69 words
An emitter for a trickle irrigation system comprising a housing defining a chamber and inlet and outlet ports opening into the chamber, and a substantial length of fine diameter tubing which has freedom to move in said chamber in response to flucuations of the pressure of fluid flowing through said tube and which lies within said chamber and connects to one only of the said inlet and outlet ports.
Claim 5
Dependent Claim
17 words
An emitter according to claim 1, in which the tubing is connected only to the inlet port.
Claim 6
Dependent Claim
34 words
An emitter according to claim 1, in which the housing is formed in two parts, each of the parts being a one-piece plastics moulding and being adapted to releasably fasten with the other part.
Claim 7
Dependent Claim
44 words
An emitter according to claim 3, in which one of the said two parts is formed with an inwardly-directed peripheral rib and the other part is formed with an outwardly-directed peripheral rib, whereby the two parts can be snapped into engagement with one another.
Claim 8
Dependent Claim
21 words
An emitter according to claim 1, in which said tubing remains continuously submerged in trickle irrigation fluid retained by said chamber.
Claim 9
Dependent Claim
39 words
An emitter according to claim 5, in which said outlet port opens into a reservoir that is partially defined by a wall arranged concentrically around said outlet port and projecting from one of said parts which form said housing.
Claim 10
Dependent Claim
24 words
An emitter according to claim 1, in which said fine diameter tubing is arranged for most of its length as a flat spiral coil.
Claim 11
Dependent Claim
23 words
An emitter according to claim 1, which is in flow communication with a pipe through which trickle irrigation fluid is to be fed.
Claim 12
Dependent Claim
21 words
An emitter according to claim 2, in which said tubing remains continuously submerged in trickle irrigation fluid retained by said chamber.
References Cited (Backward Citations)
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Cited
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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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |