US3857588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe coupling
Assignee: Individual
•
Filing: 1973-02-05
•
Granted: 1974-12-31
•
Expires: 1993-02-05
Abstract
Abstract A coupling for unthreaded pipes of a sprinkler system, which permits the replacement of a small damaged pipe section without bending the pipes already emplaced in the ground. One coupling includes a pair of end caps that can be installed on the ends of pipes that are to be joined, each cap having a short tubular portion for interfitting the tubular portion of the other cap, and also including a sleeve which can slide over both end caps to securely hold them in alignment.
Inventors
- 👤 H Curtin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:26
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/06; F16L13/00; F16L13/10; F16L13/103; F16L21/00; F16L21/002; F16L21/005; Y; Y10; Y10S; Y10S285/00; Y10S285/915; Y10S285/921
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
302 words
A pipe coupling for first and second pipes of predetermined size, comprising: a first end cap with a pipe portion that has an inside diameter slightly larger than the pipe diameter for adhesive mounting on the end of the first pipe, and with an inwardly-extending flange for abutting the end of the first pipe to determine the position of the cap thereon; a sleeve slideable along its entire length along said second pipe and having a forward end with an inside diameter slightly larger than an outer diameter portion of the cap for sliding thereover, said sleeve having means for limiting sliding thereof towards said cap so that a rearward end portion of the sleeve extends rearwardly of the end cap and around said second pipe; and a second end cap for adhesive mounting on an end of the second pipe opposite the first end cap, said second cap having an inwardly-extending flange for abutting the end of the second pipe to determine the position of the second cap thereon; each of said caps having a short tubular portion extending beyond the flange thereof, with the tubular portion of one cap receivable in the tubular portion of the other; said first end cap having a predetermined first outside diameter along most of its length, said second end cap having a forward portion of said predetermined first diameter and a rearward portion tapered to increasingly smaller outside diameters at increasingly rearward locations thereof; said sleeve having a substantially smooth internal surface with a forward portion slightly greater than said predetermined first outside diameter and a rearward portion tapered complementary to said rearward portion of said second cap for axial sliding movement of said sleeve over said caps for adhesive securement thereto, said sleeve having a substantially smooth external surface free of securing means.
Claim 2
Dependent Claim
302 words
A pipe coupling for first and second pipes of predetermined size, comprising: a first end cap with a pipe portion that has an inside diameter slightly larger than the pipe diameter for adhesive mounting on the end of the first pipe, and with an inwardly-extending flange for abutting the end of the first pipe to determine the position of the cap thereon; a sleeve slideable along its entire length along said second pipe and having a forward end with an inside diameter slightly larger than an outer diameter portion of the cap for sliding thereover, said sleeve having means for limiting sliding thereof towards said cap so that a rearward end portion of the sleeve extends rearwardly of the end cap and around said second pipe; and a second end cap for adhesive mounting on an end of the second pipe opposite the first end cap, said second cap having an inwardly-extending flange for abutting the end of the second pipe to determine the position of the second cap thereon; each of said caps having a short tubular portion extending beyond the flange thereof, with the tubular portion of one cap receivable in the tubular portion of the other; said first end cap having a predetermined first outside diameter along most of its length, said second end cap having a forward portion of said predetermined first diameter and a rearward portion tapered to increasingly smaller outside diameters at increasingly rearward locations thereof; said sleeve having a substantially smooth internal surface with a forward portion slightly greater than said predetermined first outside diameter and a rearward portion tapered complementary to said rearward portion of said second cap for axial sliding movement of said sleeve over said caps for adhesive securement thereto, said sleeve having a substantially smooth external surface free of securing means.
Claim 3
Dependent Claim
21 words
The pipe coupling described in claim 1 wherein: the rearward end portion of said sleeve closely slidingly fits the second pipe.
Claim 4
Dependent Claim
283 words
In a pipe joint that includes first and second pipes with their ends unthreaded and aligned and spaced apart, the improvement comprsing: a first end cap mounted on the end of the first pipe, said cap having a forward portion closely surrounding the pipe and a rearward portion with an inwardly-extending flange abutting the pipe end, said first end cap adhesively mounted on the first pipe; a sleeve slideable along its entire length along said second pipe when not adhesively fixed in place, with said sleeve having a substantially smooth internal surface with a forward portion closely surrounding said first end cap and adhesively joined thereto, and having a rearward portion surrounding said second pipe and fixed in position thereat; and a second end cap mounted on the end of the second pipe, said second cap having a rearward portion closely surrounding the second pipe and a forward portion with an inwardly-extending flange abutting the end of the second pipe, said second end cap adhesively mounted on the second pipe; each of said end caps having a short tubular portion extending beyond tHe end of its respective pipe, one of said tubular portions being slightly greater in internal diameter than the external diameter of the other tubular portion to closely receive it; said sleeve rearward portion closely surrounding and adhesively joined to said second end cap; said second end cap having a rearward portion tapered on the outside thereof so it has a progressively smaller outside diameter at progressively more rearward locations, said sleeve having an internal tapered rearward portion closely engaging the tapered rearward portion of the second end cap said sleeve having a substantially smooth external surface free of securing means.
Claim 5
Dependent Claim
283 words
In a pipe joint that includes first and second pipes with their ends unthreaded and aligned and spaced apart, the improvement comprsing: a first end cap mounted on the end of the first pipe, said cap having a forward portion closely surrounding the pipe and a rearward portion with an inwardly-extending flange abutting the pipe end, said first end cap adhesively mounted on the first pipe; a sleeve slideable along its entire length along said second pipe when not adhesively fixed in place, with said sleeve having a substantially smooth internal surface with a forward portion closely surrounding said first end cap and adhesively joined thereto, and having a rearward portion surrounding said second pipe and fixed in position thereat; and a second end cap mounted on the end of the second pipe, said second cap having a rearward portion closely surrounding the second pipe and a forward portion with an inwardly-extending flange abutting the end of the second pipe, said second end cap adhesively mounted on the second pipe; each of said end caps having a short tubular portion extending beyond tHe end of its respective pipe, one of said tubular portions being slightly greater in internal diameter than the external diameter of the other tubular portion to closely receive it; said sleeve rearward portion closely surrounding and adhesively joined to said second end cap; said second end cap having a rearward portion tapered on the outside thereof so it has a progressively smaller outside diameter at progressively more rearward locations, said sleeve having an internal tapered rearward portion closely engaging the tapered rearward portion of the second end cap said sleeve having a substantially smooth external surface free of securing means.
Claim 6
Dependent Claim
25 words
The improvement described in claim 3 wherein: the first end cap has an outwardly extending flange positioned forward of the forward end of the sleeve.
Claim 7
Dependent Claim
232 words
A pipe coupling for first and second pipes of predetermined size, comrprising: a tubular cap member having inner and outer surfaces, said inner surface having a diameter slightly larger than the outside diameter of said first pipe for adhesive mounting on said first pipe and including a flange projecting inwardly from said inner surface for abutting the end of said first pipe to position said cap member thereon, said member having a relatively short tubular portion extending beyond said flange for closely receiving the end of said second pipe whereby the end of said second pipe abuts said flange said outer surface including a first portion of substantially uniform diameter and a second portion tapered to define an increasingly larger diameter at increasing distances from one end of said cap member; and a tubular sleeve slideable along said second pipe and having a substantially smooth internal surface including a first portion having a diameter slightly larger than the diameter of said cap member outer surface first portion for axial sliding movement of said sleeve over said cap for adhesive mounting thereto, a second portion tapered complementary to said cap member outer surface second portion for adhesive mountin thereto and a third cylindrical portion having a diameter slightly larger than the outer surface of said second pipe for adhesively mounting thereto, said sleeve having a substantially smooth external surface free of securing means.
Claim 8
Dependent Claim
232 words
A pipe coupling for first and second pipes of predetermined size, comrprising: a tubular cap member having inner and outer surfaces, said inner surface having a diameter slightly larger than the outside diameter of said first pipe for adhesive mounting on said first pipe and including a flange projecting inwardly from said inner surface for abutting the end of said first pipe to position said cap member thereon, said member having a relatively short tubular portion extending beyond said flange for closely receiving the end of said second pipe whereby the end of said second pipe abuts said flange said outer surface including a first portion of substantially uniform diameter and a second portion tapered to define an increasingly larger diameter at increasing distances from one end of said cap member; and a tubular sleeve slideable along said second pipe and having a substantially smooth internal surface including a first portion having a diameter slightly larger than the diameter of said cap member outer surface first portion for axial sliding movement of said sleeve over said cap for adhesive mounting thereto, a second portion tapered complementary to said cap member outer surface second portion for adhesive mountin thereto and a third cylindrical portion having a diameter slightly larger than the outer surface of said second pipe for adhesively mounting thereto, said sleeve having a substantially smooth external surface free of securing means.
Claim 9
Dependent Claim
22 words
The coupling of claim 5 wherein said tubular cap member is comprised of first and second end caps aligned end to end.
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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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |