Patent US3603616A successfully refreshed from Google Patents.
US3603616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flange coupling repair ring
Assignee: PIPE LINE DEVELOPMENT CO
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Filing: 1969-08-22
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Granted: 1971-09-07
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Expires: 1989-08-22
Abstract
Abstract Locating and aligning lug means are provided for a type of coupling used in the repair of leaking flanged pipe joints which index the coupling to the center of the joint, permitting the coupling length to be independent of the length of the joint.
Inventors
- 👤 Joseph B Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:27
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/16; F16L23/165; F16L55/00; F16L55/16; F16L55/168; F16L55/175
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
303 words
In a sealing and repair coupling for sealing fluid leakage in a joint defined by opposed pipe flanges having adjacent faces and each having a cylindrical outer surface, said joint being formed by first gasket means pressed between inner annular portions of said adjacent flange faces, the outer portions of said adjacent flange faces, the outer portions of said adjacent flange faces spaced apart, a plurality of aligned fastener holes in each flange, a fastener through each pair of aligned holes, said sealing and repair coupling sealing fluid leakage past said first gasket means and including a cylinder adapted to be positioned over each of said cylindrical outer flange surfaces, second gasket means between said cylinder and the cylindrical outer surface of each flange on both sides of the space between said outer flange portions, said second gasket means being compressed between an inner cylindrical surface of said cylinder and the outer cylindrical surface of said flanges, means for admitting pressurized fluid sealant into a zone defined by said cylinder, said first and second gasket means, said spaced apart outer portions of said flange faces and said holes whereby sealant may flow into a clearance between each fastener and each hole, the improvement comprising a sealing and repair coupling cylinder formed of at least two circular segments having an axial length substantially independent of the combined outer length of said flanges and the space therebetween, said segments providing selfaligning lug means extending radially inward from said inner cylindrical surface adapted to enter said space, said lug means being located substantially midway along the axial length of said segment, said second gasket means being provided on both axial sides of said lug means, said lug means being welded to said inner cylindrical surface in a manner which permits such lug means to be removed.
Claim 2
Dependent Claim
303 words
In a sealing and repair coupling for sealing fluid leakage in a joint defined by opposed pipe flanges having adjacent faces and each having a cylindrical outer surface, said joint being formed by first gasket means pressed between inner annular portions of said adjacent flange faces, the outer portions of said adjacent flange faces, the outer portions of said adjacent flange faces spaced apart, a plurality of aligned fastener holes in each flange, a fastener through each pair of aligned holes, said sealing and repair coupling sealing fluid leakage past said first gasket means and including a cylinder adapted to be positioned over each of said cylindrical outer flange surfaces, second gasket means between said cylinder and the cylindrical outer surface of each flange on both sides of the space between said outer flange portions, said second gasket means being compressed between an inner cylindrical surface of said cylinder and the outer cylindrical surface of said flanges, means for admitting pressurized fluid sealant into a zone defined by said cylinder, said first and second gasket means, said spaced apart outer portions of said flange faces and said holes whereby sealant may flow into a clearance between each fastener and each hole, the improvement comprising a sealing and repair coupling cylinder formed of at least two circular segments having an axial length substantially independent of the combined outer length of said flanges and the space therebetween, said segments providing selfaligning lug means extending radially inward from said inner cylindrical surface adapted to enter said space, said lug means being located substantially midway along the axial length of said segment, said second gasket means being provided on both axial sides of said lug means, said lug means being welded to said inner cylindrical surface in a manner which permits such lug means to be removed.
Claim 3
Dependent Claim
28 words
A sealing and repair coupling as set forth in claim 1 wherein said self-aligning means are provided at each of the arcuate ends of each of said segments.
Claim 4
Dependent Claim
186 words
A flanged pipe joint comprising flanges which include adjacent flange faces defining a joint between adjacent pipes, first gasket means pressed between inner annular portions of said flange faces, the remaining portions of said flange faces spaced apart, a plurality of aligned fastener holes in each flange, a fastener through each pair of aligned holes, said flanges having cylindrical outer surfaces, a pair of semicylindrical sealing and repair segments being fastened together around said flanges, second gasket means compressed between inner surfaces of said segments and the cylindrical outer surface of each flange, said inner surfaces, second gasket means, outer surfaces, remaining flange face portions, and said first gasket means enclosing an annular zone, each fastener and its associated holes defining clearance zones, means for admitting pressurized fluid sealant to said annular and clearance zones, each of said segments providing self-aligning lug means extending radially inward from its inner surface into the space between said remaining flange face portions, said self-aligning lug means terminating outside a circular zone described by a radius from the center of the flanges to the outer tangent of said fastener holes.
Claim 5
Dependent Claim
186 words
A flanged pipe joint comprising flanges which include adjacent flange faces defining a joint between adjacent pipes, first gasket means pressed between inner annular portions of said flange faces, the remaining portions of said flange faces spaced apart, a plurality of aligned fastener holes in each flange, a fastener through each pair of aligned holes, said flanges having cylindrical outer surfaces, a pair of semicylindrical sealing and repair segments being fastened together around said flanges, second gasket means compressed between inner surfaces of said segments and the cylindrical outer surface of each flange, said inner surfaces, second gasket means, outer surfaces, remaining flange face portions, and said first gasket means enclosing an annular zone, each fastener and its associated holes defining clearance zones, means for admitting pressurized fluid sealant to said annular and clearance zones, each of said segments providing self-aligning lug means extending radially inward from its inner surface into the space between said remaining flange face portions, said self-aligning lug means terminating outside a circular zone described by a radius from the center of the flanges to the outer tangent of said fastener holes.
Claim 6
Dependent Claim
20 words
A flanged pipe joint as set forth in claim 3 wherein said self-aligning lug means are narrower than said space.
Claim 7
Dependent Claim
280 words
In a sealing and repair coupling for sealing fluid leakage in a joint defined by opposed pipe flanges having adjacent faces and each having a cylindrical outer surface, said joint being formed by first gasket means pressed between inner annular portions of said adjacent flange faces, the outer portions of said adjacent flange faces spaced apart, a plurality of aligned fastener holes in each flange, a fastener through each pair of aligned holes, said sealing and repair coupling sealing fluid leakage past said first gasket means and including a cylinder adapted to be positioned over each of said cylindrical outer flange surfaces, second gasket means between said cylinder and the cylindrical outer surface of each flange on both sides of the space between said outer flange portions, said second gasket means being compressed between an inner cylindrical surface of said cylinder and the outer cylindrical surface of said flanges, means for admitting pressurized fluid sealant into a zone defined by said cylinder, said first and second gasket means, said spaced apart outer portions of said flange faces and said holes whereby sealant may flow into a clearance between each fastener and each hole, the improvement comprising a sealing and repair coupling cylinder formed of at least two circular segments having an axial length substantially independent of the combined outer length of said flanges and the space therebetween, said segments providing self-aligned lug means extending radially inward from said inner cylindrical surface adapted to enter said space, said self-aligning lug means being proportioned so that their inner extremities are outside a circular zone described by a radius from the center of the flanges to the outer tangent of said fastener holes.
Claim 8
Dependent Claim
280 words
In a sealing and repair coupling for sealing fluid leakage in a joint defined by opposed pipe flanges having adjacent faces and each having a cylindrical outer surface, said joint being formed by first gasket means pressed between inner annular portions of said adjacent flange faces, the outer portions of said adjacent flange faces spaced apart, a plurality of aligned fastener holes in each flange, a fastener through each pair of aligned holes, said sealing and repair coupling sealing fluid leakage past said first gasket means and including a cylinder adapted to be positioned over each of said cylindrical outer flange surfaces, second gasket means between said cylinder and the cylindrical outer surface of each flange on both sides of the space between said outer flange portions, said second gasket means being compressed between an inner cylindrical surface of said cylinder and the outer cylindrical surface of said flanges, means for admitting pressurized fluid sealant into a zone defined by said cylinder, said first and second gasket means, said spaced apart outer portions of said flange faces and said holes whereby sealant may flow into a clearance between each fastener and each hole, the improvement comprising a sealing and repair coupling cylinder formed of at least two circular segments having an axial length substantially independent of the combined outer length of said flanges and the space therebetween, said segments providing self-aligned lug means extending radially inward from said inner cylindrical surface adapted to enter said space, said self-aligning lug means being proportioned so that their inner extremities are outside a circular zone described by a radius from the center of the flanges to the outer tangent of said fastener holes.
References Cited (Backward Citations)
US3152816A
Cited
US3467141A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |