US4313625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lined pipe assembly
Assignee: Dow Chemical Co
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Filing: 1980-09-26
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Granted: 1982-02-02
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Expires: 2000-09-26
Abstract
Abstract An improved lined pipe assembly is provided wherein the lined pipe and liner are deformed to provide an outwardly flaring flange, a loose tapered ring is disposed on the pipe adjacent the flange and the pipe joined to a similar pipe or cast fitting by means of a split "V" clamp. Highly reliable joints are obtained.
Inventors
- 👤 Walter H. West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:31
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/04; F16L23/08; F16L23/12; F16L23/125; F16L58/00; F16L58/18; F16L58/187
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
167 words
An improved pipe joint, the pipe joint comprising a plastic lined conduit having a synthetic resinous pressure deformable liner disposed within a pressure deformable metal conduit, said plastic lined conduit having at least one end, the conduit end defining a radially outwardly projecting flange composed of deformed metal of the metal conduit and deformed plastic of the liner, a loose ring having a generally planar face and a tapering face, the loose ring being disposed about the conduit with the generally planar face of the ring disposed against a metal portion of the outwardly projecting flange, the loose ring having the tapering face remote from the radially outwardly projecting flange, the tapering face tapering outwardly toward a periphery of the flange, a split "V" clamp disposed about the loose ring and an opposed tapering surface of generally like configuration to the tapering face of the loose ring, and the split "V" clamp thereby forcing the deformed plastic of the liner against an opposed liner engaging sealing surface.
Claim 2
Dependent Claim
167 words
An improved pipe joint, the pipe joint comprising a plastic lined conduit having a synthetic resinous pressure deformable liner disposed within a pressure deformable metal conduit, said plastic lined conduit having at least one end, the conduit end defining a radially outwardly projecting flange composed of deformed metal of the metal conduit and deformed plastic of the liner, a loose ring having a generally planar face and a tapering face, the loose ring being disposed about the conduit with the generally planar face of the ring disposed against a metal portion of the outwardly projecting flange, the loose ring having the tapering face remote from the radially outwardly projecting flange, the tapering face tapering outwardly toward a periphery of the flange, a split "V" clamp disposed about the loose ring and an opposed tapering surface of generally like configuration to the tapering face of the loose ring, and the split "V" clamp thereby forcing the deformed plastic of the liner against an opposed liner engaging sealing surface.
Claim 3
Dependent Claim
196 words
An improved pipe joint, the pipe joint comprising a first and second plastic lined conduit, each plastic lined conduit having a synthetic resinous pressure deformable liner disposed within a pressure deformable metal conduit, each of said plastic lined conduits having at least one end, each of the conduit ends defining a generally radially outwardly projecting flange composed of deformed metal of the metal conduit and deformed plastic of the liner, each of the conduits having a loose ring, each of the loose rings having a generally planar face and a tapering face, each of the loose rings being disposed about an associated conduit wherein the generally planar face of the ring is disposed against a metal portion of the outwardly projecting flange, each of the loose rings having a tapering face remote from the radially outwardly projecting flange, the tapering faces of the loose rings tapering outwardly toward a periphery of the flange, a split "V" clamp disposed about the loose rings and opposed tapering surfaces of the loose ring, the split "V" clamp thereby forcing the deformed plastic of the liners against each other to cause the deformed plastic liners to be in sealing engagement.
Claim 4
Dependent Claim
196 words
An improved pipe joint, the pipe joint comprising a first and second plastic lined conduit, each plastic lined conduit having a synthetic resinous pressure deformable liner disposed within a pressure deformable metal conduit, each of said plastic lined conduits having at least one end, each of the conduit ends defining a generally radially outwardly projecting flange composed of deformed metal of the metal conduit and deformed plastic of the liner, each of the conduits having a loose ring, each of the loose rings having a generally planar face and a tapering face, each of the loose rings being disposed about an associated conduit wherein the generally planar face of the ring is disposed against a metal portion of the outwardly projecting flange, each of the loose rings having a tapering face remote from the radially outwardly projecting flange, the tapering faces of the loose rings tapering outwardly toward a periphery of the flange, a split "V" clamp disposed about the loose rings and opposed tapering surfaces of the loose ring, the split "V" clamp thereby forcing the deformed plastic of the liners against each other to cause the deformed plastic liners to be in sealing engagement.
References Cited (Backward Citations)
DE561772C
Cited
FR1012286A
Cited
US2919936A
Cited
DE1268456B
Cited
US3335758A
Cited
US3398978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-01 | 1985-08-03 | 1986-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-01 | 1989-08-03 | 1990-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-01 | 1993-08-03 | 1994-02-02 | $7700.00 | Window Closed / Lapsed |