US4314718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tensile ring composite pipe coupling
Assignee: Aerofit Products Inc
•
Filing: 1979-11-28
•
Granted: 1982-02-09
•
Expires: 1999-11-28
Abstract
Abstract The invention is a composite pipe coupling having a corrosion resistant liner which seals pipes to be coupled by utilization of a heat recoverable metallic material and having a pair of complementary heat recoverable metallic tensile rings and an external support structure which supplement the tensile strength of said liner, and of the overall coupling.
Inventors
- 👤 Harry C. Broyles
- 👤 Laszlo Szalvay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:18
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/14; F16L13/141; F16L13/004
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
175 words
A composite pipe coupling comprising: (a) a liner means having an opening therethrough capable of receiving the ends of the pipes to be connected; (b) driver means of heat-recoverable metallic material having an opening therethrough mounted concentrically around said liner means, said driver means constricting radially inwardly upon heat recovery to grip said liner means and to deform said liner means into a sealing condition with pipes to be connected; (c) a pair of tensile rings of heat-recoverable metallic material, one of said tensile rings being axially mounted adjacent and in axial contact with one end of said liner means, and the other of said tensile rings being axially mounted and in contact with the other end of said liner means, said tensile rings constricting radially inwardly upon heat recovery to each grip a pipe to be connected; and (d) external support means having an opening therethrough mounted concentrically around said liner, driver means and said tensile rings to axially contain and support said tensile rings and the liner means positioned between said tensile rings.
Claim 2
Dependent Claim
175 words
A composite pipe coupling comprising: (a) a liner means having an opening therethrough capable of receiving the ends of the pipes to be connected; (b) driver means of heat-recoverable metallic material having an opening therethrough mounted concentrically around said liner means, said driver means constricting radially inwardly upon heat recovery to grip said liner means and to deform said liner means into a sealing condition with pipes to be connected; (c) a pair of tensile rings of heat-recoverable metallic material, one of said tensile rings being axially mounted adjacent and in axial contact with one end of said liner means, and the other of said tensile rings being axially mounted and in contact with the other end of said liner means, said tensile rings constricting radially inwardly upon heat recovery to each grip a pipe to be connected; and (d) external support means having an opening therethrough mounted concentrically around said liner, driver means and said tensile rings to axially contain and support said tensile rings and the liner means positioned between said tensile rings.
Claim 3
Dependent Claim
96 words
A device as in claim 1 wherein said external support means has a pair of concentric sealing lips one of which is located at each end of said external support means, each of said lips extending axially inwardly toward said pair of tensile rings, a portion of each said sealing lips extending under each of said pair of tensile rings, respectively, said tensile rings constricting radially upon recovery to grip the portion of said sealing lips under the tensile rings to seal said external support structure with respect to pipes to be connected from external contamination.
Claim 4
Dependent Claim
24 words
A device as in claim 2 wherein said driver means comprises a plurality of ring-like segments distributed axially along and over said liner means.
Claim 5
Dependent Claim
28 words
A device as in claim 2 wherein said driver means has non-uniform heat-recovery along its axial dimension so that the gripping forces of said driver means are non-uniform.
References Cited (Backward Citations)
US351263A
Cited
US1115411A
Cited
US2984899A
Cited
GB992488A
Cited
US3287034A
Cited
US3524665A
Cited
GB1232741A
Cited
US3827727A
Cited
US3836182A
Cited
US3730562A
Cited
DE2448160A1
Cited
FR2306784A2
Cited
GB1488393A
Cited
US3872573A
Cited
GB1494881A
Cited
GB1553427A
Cited
US4070044A
Cited
US4135743A
Cited
US4124231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |