US4576400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Riser repair assembly for underground irrigation systems
Assignee: Individual
•
Filing: 1984-02-10
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Granted: 1986-03-18
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Expires: 2004-02-10
Abstract
Abstract A repair assembly for broken or leaking risers in underground irrigation systems is provided. The repair assembly is adapted to be inserted into a hole through the wall of a buried water distribution line and is held in place by locking tangs engaging the interior surface of the distribution line and by a locking ring flange disposed about the exterior of the assembly and bearing on the exterior wall of the distribution line.
Inventors
- 👤 Von D. Allred
- 👤 Don B. Harmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:28
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/18; F16L55/16; F16L55/179
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
160 words
A repair assembly for broken or leaking risers in underground irrigation systems comprising: an elongated cylindrical casing having a top end and a bottom end, said botton end adapted for insertion into a circular hole through the wall of a buried water distribution line; a plurality of slots cut into said botton end parallel to the axis of said cylindrical casing, said slots defining a plurality of tang members, each of said tang members having an attached end and a free end; outwardly extending lugs fixed to the exterior of alternate tang members, the free ends of said tang members with affixed lugs bent inwardly a sufficient degree that said lugs do not project beyond the diameter of said cylindrical casing; wedge means disposed within said casing and adapted to move downwardly to spread said lug affixed tang members outwardly, and a retaining flange disposed about the exterior of said casing at a lower section thereof above said tang members.
Claim 2
Dependent Claim
160 words
A repair assembly for broken or leaking risers in underground irrigation systems comprising: an elongated cylindrical casing having a top end and a bottom end, said botton end adapted for insertion into a circular hole through the wall of a buried water distribution line; a plurality of slots cut into said botton end parallel to the axis of said cylindrical casing, said slots defining a plurality of tang members, each of said tang members having an attached end and a free end; outwardly extending lugs fixed to the exterior of alternate tang members, the free ends of said tang members with affixed lugs bent inwardly a sufficient degree that said lugs do not project beyond the diameter of said cylindrical casing; wedge means disposed within said casing and adapted to move downwardly to spread said lug affixed tang members outwardly, and a retaining flange disposed about the exterior of said casing at a lower section thereof above said tang members.
Claim 3
Dependent Claim
32 words
The repair assembly of claim 1 having eight tang members, four of said tang members functioning as guide tangs and four of said tang members with lugs affixed functioning as locking tangs.
Claim 4
Dependent Claim
42 words
The repair assembly of claim 2 wherein said wedge means comprises a thick walled cylinder slidingly fitting within said casing and having a tapered bottom edge adapted to engage said locking tangs and bend them outwardly upon downward movement of said cylinder.
Claim 5
Dependent Claim
56 words
The repair assembly of claim 3 including a wedge means activating rod, the lower end of said rod rotatably fixed to a bar member extending across the interior of said cylinder, an upper portion of said rod threadably engaging a cross bar fixedly disposed across the interior of said cylindrical casing at an upper section thereof.
Claim 6
Dependent Claim
29 words
The repair assembly of claim 4 wherein an end of said wedge means operating rod extends above the top of said cylindrical casing and terminates in wrench attachment means.
Claim 7
Dependent Claim
29 words
The repair assembly of claim 1 wherein said retaining flange comprises an internally threaded ring engageable with a threaded exterior portion of said cylindrical casing above said tang members.
Claim 8
Dependent Claim
22 words
The repair assembly of claim 1 wherein the top end of said cylindrical casing is threaded for attachment to a riser assembly.
Claim 9
Dependent Claim
25 words
The repair assembly of claim 2 wherein said tang members are slightly shorter in length than is the wall thickness of said water distribution line.
Claim 10
Dependent Claim
36 words
The repair assembly of claim 2 wherein opposing pairs of locking tangs are of equal arc length and the midpoint of each of said opposing locking tangs are disposed at essentially 180° one from the other.
Claim 11
Dependent Claim
24 words
The repair assembly of claim 9 wherein one pair of locking tangs is disposed at right angles to the other pair of locking tangs.
Claim 12
Dependent Claim
20 words
The repair assembly of claim 2 wherein each locking tang includes about twice the arc length of each guide tang.
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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) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |