US3834628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trickle irrigation device
Assignee: Individual
•
Filing: 1973-03-20
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Granted: 1974-09-10
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Expires: 1993-03-20
Abstract
Abstract Trickle irrigation devices are described comprising an outer housing and an inner core. The contacting surfaces of the housing and core define a chamber and a plurality of separate parallel labyrinths each communicating with the chamber. The core is fixed within the housing by means of threads which define a spirallyextending conduit providing a path, between the water inlet and the chamber to the labyrinths. In one described embodiment, the core is a unitary member formed with both the threads and the labyrinth configuration; and in a second described embodiment the core comprises two sections, one being formed with the threads, and the other being a replaceable annular insert formed with the labyrinth configuration.
Inventors
- 👤 H Selman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:00
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/02; A01G25/023
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
93 words
A trickle irrigation device, comprising a housing having a water supply inlet connectable to a water supply pipe, and an inner core disposed within the housing in contact with the inner surface thereof, characterized in that the inner surface of the housing and the outer surface of the core define a chamber communicating with the water supply inlet and further define a plurality of separate labyrinths each having its inlet end communicating with the chamber, the device further including separate water outlets each communicating with the outlet end of one of said labyrinths.
Claim 2
Dependent Claim
93 words
A trickle irrigation device, comprising a housing having a water supply inlet connectable to a water supply pipe, and an inner core disposed within the housing in contact with the inner surface thereof, characterized in that the inner surface of the housing and the outer surface of the core define a chamber communicating with the water supply inlet and further define a plurality of separate labyrinths each having its inlet end communicating with the chamber, the device further including separate water outlets each communicating with the outlet end of one of said labyrinths.
Claim 3
Dependent Claim
58 words
A device according to claim 1, wherein said housing is internally threaded at one end, and said core is externally threaded at one end, the two threads being so dimensioned that between them they form a spirally-extending conduit one end of which communicates with said water supply inlet, and the opposite end of which communicates with said chamber.
Claim 4
Dependent Claim
33 words
A device according to claim 2, wherein said housing and core are so dimensioned as to define a second chamber between said water supply inlet and said one end of the spirally-extending conduit.
Claim 5
Dependent Claim
60 words
A device according to claim 3, wherein said first mentioned chamber is defined by the inner surface of a side wall of the housing and an annular recess formed in the outer surface of the said core, and wherein said second chamber is defined by the bottom of the core and the inner surface of the bottom of the housing.
Claim 6
Dependent Claim
48 words
A device according to claim 1, wherein said core includes two sepArable sections, one section being attached to and within the housing, the other section being a removable annular insert carried by said one section and forming said labyrinths between it and the inner surface of the housing.
Claim 7
Dependent Claim
27 words
A device according to claim 1, wherein the contacting surfaces of the housing and core define four separate labyrinths leading from said chamber to four separate outlets.
Claim 8
Dependent Claim
121 words
A trickle irrigation device, comprising: a housing formed at one end with an inlet connectable to a water supply pipe, and with a plurality of separate water outlets at the opposite end; said one end of the housing being internally threaded; and a core formed at one end with external threads dimensioned with respect to the internal threads of the housing to define between them a spirally-extending conduit communicating with said inlet; the opposite end of said core being formed with a surface configuration which, together with the contacting inner surface of the housing, defines a chamber and a plurality of separate labyrinths each having one end communicating with said chamber and the opposite end communicating with one of said outlets.
Claim 9
Dependent Claim
121 words
A trickle irrigation device, comprising: a housing formed at one end with an inlet connectable to a water supply pipe, and with a plurality of separate water outlets at the opposite end; said one end of the housing being internally threaded; and a core formed at one end with external threads dimensioned with respect to the internal threads of the housing to define between them a spirally-extending conduit communicating with said inlet; the opposite end of said core being formed with a surface configuration which, together with the contacting inner surface of the housing, defines a chamber and a plurality of separate labyrinths each having one end communicating with said chamber and the opposite end communicating with one of said outlets.
Claim 10
Dependent Claim
33 words
A device according to claim 7, wherein said core includes a separate annular insert formed with external ribs defining said labyrinth, said annular insert being removably attached to the remainder of the core.
Claim 11
Dependent Claim
92 words
A trickle irrigation device, comprising: a housing having a water supply inlet connectable to a water supply line, and an inner core disposed within the housing in contact with the inner surface thereof; said core being formed within an annular recess in its outer surface forming, with the inner surface of the housing, an annular chamber; said core further defining, with the inner surface of the housing, a plurality of separate labyrinths each having an inlet in communication with said chamber and a separate outlet leading out of the trickle irrigation device.
Claim 12
Dependent Claim
92 words
A trickle irrigation device, comprising: a housing having a water supply inlet connectable to a water supply line, and an inner core disposed within the housing in contact with the inner surface thereof; said core being formed within an annular recess in its outer surface forming, with the inner surface of the housing, an annular chamber; said core further defining, with the inner surface of the housing, a plurality of separate labyrinths each having an inlet in communication with said chamber and a separate outlet leading out of the trickle irrigation device.
Claim 13
Dependent Claim
58 words
A device according to claim 9, wherein said housing is internally threaded at one end, and said core is externally threaded at one end, the two threads being so dimensioned that between them they form a spirally-extending conduit one end of which communicates with said water supply inlet and the opposite end of which communicates with said chamber.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |