US3856333A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drip irrigator device
Assignee: Johns Manville Corp
•
Filing: 1972-12-07
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Granted: 1974-12-24
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Expires: 1992-12-07
Abstract
Abstract An irrigation dripper unit is described which connects adjacent pipeline sections and comprises an outer tubular member, an inner tubular member fitting within the outer tubular member, end portions for attachment to adjacent pipeline sections, a series of radial flanges along said inner tubular member, each flange having a notch therein, and the notches and grooves between the flanges defining a labyrinthine path for an irrigating fluid from one end of the series of flanges to the other.
Inventors
- 👤 E Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:52
CPC Classifications
A; A01; A01G; A01G25/00; A01G25/02; A01G25/023; F; F16; F16L; F16L55/00; F16L55/02; F16L55/027; F16L55/02736; A01G25/006; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/22
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
318 words
An irrigation dripper unit to connect adjacent pipeline sections comprising: an outer tubular member; an inner tubular member fitting within said outer tubular member; one pair of opposite end portions of said inner and outer tubular members projecting beyond the other pair of opposite end portions of said outer and inner tubular members respectively, for connection to adjacent pipeline sections; a series of radial flanges axially spaced apart and attached to and projecting from the outer surface of said inner tubular member, each of said flanges extending circumferentially entirely around said inner tubular member and extending to substantially fill the annular space between said inner and outer tubular members, each of said flanges having therein a notch permitting fluid communication between opposite sides of the flange; the notches in adjacent flanges being spaced apart circumferentially whereby there is defined a labyrinthine path for irrigation fluid passing from one end of said series of flanges axially along said inner tubular member to the other end of said inner tubular member, said labyrinthine path being radially bounded by the inner surface of said outer tubular member and the outer surface of said inner tubular member; a groove between each pair of adjacent radial flanges, wherein each groove has therein a barrier which completely blocks said groove and the notches in the adjacent pair of radial flanges being adjacent to, but spaced on opposite sides of said barrier, each of said grooves extending circumferentially around said inner tubular member from one side of said barrier to the other side of said barrier, thereby defining a fluid path which essentially encircles said inner tubular member; one end of said labyrinthine path communicating with an adjacent pipe section and defining an inlet; an outlet in said unit adjacent to and communicating with the opposite end of said labyrinthine path; and connecting means formed in said unit for releasably connecting said tubular members together.
Claim 2
Dependent Claim
318 words
An irrigation dripper unit to connect adjacent pipeline sections comprising: an outer tubular member; an inner tubular member fitting within said outer tubular member; one pair of opposite end portions of said inner and outer tubular members projecting beyond the other pair of opposite end portions of said outer and inner tubular members respectively, for connection to adjacent pipeline sections; a series of radial flanges axially spaced apart and attached to and projecting from the outer surface of said inner tubular member, each of said flanges extending circumferentially entirely around said inner tubular member and extending to substantially fill the annular space between said inner and outer tubular members, each of said flanges having therein a notch permitting fluid communication between opposite sides of the flange; the notches in adjacent flanges being spaced apart circumferentially whereby there is defined a labyrinthine path for irrigation fluid passing from one end of said series of flanges axially along said inner tubular member to the other end of said inner tubular member, said labyrinthine path being radially bounded by the inner surface of said outer tubular member and the outer surface of said inner tubular member; a groove between each pair of adjacent radial flanges, wherein each groove has therein a barrier which completely blocks said groove and the notches in the adjacent pair of radial flanges being adjacent to, but spaced on opposite sides of said barrier, each of said grooves extending circumferentially around said inner tubular member from one side of said barrier to the other side of said barrier, thereby defining a fluid path which essentially encircles said inner tubular member; one end of said labyrinthine path communicating with an adjacent pipe section and defining an inlet; an outlet in said unit adjacent to and communicating with the opposite end of said labyrinthine path; and connecting means formed in said unit for releasably connecting said tubular members together.
Claim 3
Dependent Claim
27 words
The irrigation dripper unit as described in claim 1, wherein the last downstream radial flange in said series of radial flanges has therein a plurality of openings.
References Cited (Backward Citations)
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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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |