Patent US3756632A successfully refreshed from Google Patents.
US3756632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling apparatus for pipe
Assignee: East 74Th Street Holdings Inc
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Filing: 1971-11-10
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Granted: 1973-09-04
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Expires: 1991-11-10
Abstract
Abstract This invention relates to a coupling apparatus for pipe, such as a valve, meter riser, tee fitting, or the like. The apparatus is characterized by a body portion having provision therein for the insertion of a length of pipe having a rigid insert positioned therein with an exposed flange extending therefrom, in conjunction with a rigid tubular collar, a compression ring and a tightening nut which is threadably connected to the body portion for the compression of the compression ring against the collar to apply compressive pressure on the pipe in an arrangement such that pull on the pipe is applied to the collar and thence to the compression ring applying increased compression on the ring.
Inventors
- 👤 J Riggs
- 👤 R Stiner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:23
CPC Classifications
F; F16; F16L; F16L47/00; F16L47/04; F16L19/00; F16L19/06; F16L19/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
333 words
A coupling apparatus for a plastic pipe, comprising: a body having a first axial bore in one end of a diameter approximately the inside diameter of the pipe, and a second axial bore on the other end of a diameter greater than the outside diameter of the pipe, the first and second axial bores being coaxial and meeting to form an internal flange; a rigid insert having an axial bore therethrough, the outer circumferential surface of which is the approximate diameter of the inside diameter of the pipe, the insert being positioned within the end of the pipe, and the insert having a flare end thereon exposed at the end of the pipe, the pipe having the insert therein being positioned within the body second bore so that the flared end of said insert butts with said internal flange; a rigid tubular collar having an inside diameter approximately the outside diameter of the pipe and an outside diameter approximately that of the second axial bore of the body, the collar being positioned about the pipe within the body second bore, one end of the collar having a recess therein receiving the flared end of the insert, the collar being slidable relative to the body and the pipe; a compression ring of resilient material having an inside and outside diameter dimensionally similar to said collar and positioned about the pipe within the body second bore, one end of the compression ring abutting the other end of said collar; and a tightening nut having an externally threaded portion received by the internally threaded second axial bore of said body, the tightening nut having an axial bore receiving the pipe, the end of the portion within said body second bore engaging said compression ring whereby tightening said nut within said body causes the compression ring to securely engage the pipe and whereby pull on the pipe exerts pull on said insert and thereby on to said collar to apply increased compression force on said compression ring.
Claim 2
Dependent Claim
333 words
A coupling apparatus for a plastic pipe, comprising: a body having a first axial bore in one end of a diameter approximately the inside diameter of the pipe, and a second axial bore on the other end of a diameter greater than the outside diameter of the pipe, the first and second axial bores being coaxial and meeting to form an internal flange; a rigid insert having an axial bore therethrough, the outer circumferential surface of which is the approximate diameter of the inside diameter of the pipe, the insert being positioned within the end of the pipe, and the insert having a flare end thereon exposed at the end of the pipe, the pipe having the insert therein being positioned within the body second bore so that the flared end of said insert butts with said internal flange; a rigid tubular collar having an inside diameter approximately the outside diameter of the pipe and an outside diameter approximately that of the second axial bore of the body, the collar being positioned about the pipe within the body second bore, one end of the collar having a recess therein receiving the flared end of the insert, the collar being slidable relative to the body and the pipe; a compression ring of resilient material having an inside and outside diameter dimensionally similar to said collar and positioned about the pipe within the body second bore, one end of the compression ring abutting the other end of said collar; and a tightening nut having an externally threaded portion received by the internally threaded second axial bore of said body, the tightening nut having an axial bore receiving the pipe, the end of the portion within said body second bore engaging said compression ring whereby tightening said nut within said body causes the compression ring to securely engage the pipe and whereby pull on the pipe exerts pull on said insert and thereby on to said collar to apply increased compression force on said compression ring.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |