US3827733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe coupling unit
Assignee: Individual
•
Filing: 1972-06-29
•
Granted: 1974-08-06
•
Expires: 1992-06-29
Abstract
Abstract A coupling device for pipes is disclosed which provides strong mechanical connection and fluid sealing without the requirement of close tolerances in the dimensions of the pipes to be connected. A coupling device comprises inner and outer sleeves with an annular space therebetween adapted to receive the end of a pipe to be joined. A coupling device may be double ended and adapted to accept a pipe to be joined at each end or it may be single ended and adapted to accept a pipe at one end only. Force exerting means suitably in the form of a threaded fastener coact with the inner sleeve for expanding at least a portion thereof radially whereby the end of a pipe inserted between the sleeves will be squeezed therebetween to form the joint.
Inventors
- 👤 T Cassel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:31
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/002; Y; Y10; Y10T; Y10T403/00; Y10T403/49; Y10T403/4991
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
103 words
A coupling device for pipes comprising an outer sleeve, an inner sleeve disposed inside the outer sleeve and defining an annular opening therebetween at one end thereof, at least said inner sleeve being made of an ordinarily resilient and deformable material, said opening being adapted to receive the end of a pipe, said inner sleeve including an inwardly extending deformation adjacent said one end thereof, and tensioned fastener means extending through said outer sleeve and through said deformation whereby said inner sleeve will be expanded radially and the wall of a pipe end inserted in said opening will be squeezed between said sleeves.
Claim 2
Dependent Claim
103 words
A coupling device for pipes comprising an outer sleeve, an inner sleeve disposed inside the outer sleeve and defining an annular opening therebetween at one end thereof, at least said inner sleeve being made of an ordinarily resilient and deformable material, said opening being adapted to receive the end of a pipe, said inner sleeve including an inwardly extending deformation adjacent said one end thereof, and tensioned fastener means extending through said outer sleeve and through said deformation whereby said inner sleeve will be expanded radially and the wall of a pipe end inserted in said opening will be squeezed between said sleeves.
Claim 3
Dependent Claim
51 words
The invention as defined in claim 1 wherein said sleeves also define a second annular opening therebetween at the other end thereof, said inner sleeve including an inwardly extending deformation extending from one end thereof to the other, said second annular opening being adapted to receive the end of another pipe.
Claim 4
Dependent Claim
31 words
The invention as defined in claim 2 including support means disposed between said sleeves at a location intermediate the ends thereof for holding the ends of said sleeves in spaced relation.
Claim 5
Dependent Claim
45 words
The invention as defined in claim 2 including an axially elongated washer disposed on the outside of said outer sleeve, and wherein said fastener means comprises a pair of aXially spaced bolts with shanks extending through said sleeves and said washer in a radial direction.
Claim 6
Dependent Claim
32 words
The invention as defined in claim 1 wherein said outer sleeve is circular in cross section and said inner sleeve is also circular in cross section except for an inwardly extending deformation.
Claim 7
Dependent Claim
15 words
The invention as defined in claim 1 wherein said sleeves are formed of steel pipe.
Claim 8
Dependent Claim
166 words
A coupling comprising an outer sleeve, an inner sleeve disposed inside the outer sleeve and defining an annular opening therebetween at each end thereof, the annular opening at each end being adapted to receive the end of a pipe, at least said inner sleeve being made of an ordinarily resilient and deformable material said inner sleeve including an inward deformation extending from one end to the other and being approximately the same length as the outer sleeve, support means disposed between the inner and outer pipes for holding them in spaced, coaxial relation, a first pipe having an end of circular cross-section inserted in one of the annular openings, a second pipe having an end of circular cross-section inserted in the other one of the annular openings, and tensioned fastener means extending through said outer sleeve and through said deformation whereby said inner sleeve will be expanded radially and the walls of said first and second pipes will be squeezed between the sleeves by said tension.
Claim 9
Dependent Claim
166 words
A coupling comprising an outer sleeve, an inner sleeve disposed inside the outer sleeve and defining an annular opening therebetween at each end thereof, the annular opening at each end being adapted to receive the end of a pipe, at least said inner sleeve being made of an ordinarily resilient and deformable material said inner sleeve including an inward deformation extending from one end to the other and being approximately the same length as the outer sleeve, support means disposed between the inner and outer pipes for holding them in spaced, coaxial relation, a first pipe having an end of circular cross-section inserted in one of the annular openings, a second pipe having an end of circular cross-section inserted in the other one of the annular openings, and tensioned fastener means extending through said outer sleeve and through said deformation whereby said inner sleeve will be expanded radially and the walls of said first and second pipes will be squeezed between the sleeves by said tension.
Claim 10
Dependent Claim
18 words
The invention as defined in claim 1 wherein said fastener means is a pair of axially spaced bolts.
Claim 11
Dependent Claim
42 words
The invention as defined in claim 8 including an elongated washer disposed over said bolts on the outer surface of the outer sleeve and having a cross sectional configuration conforming to the cross sectional configuration of said deformation in the inner sleeve.
Claim 12
Dependent Claim
29 words
The invention as defined in claim 9 wherein the outer sleeve is circular in cross section and said inner sleeve is circular in cross section except for said deformation.
Claim 13
Dependent Claim
35 words
The invention as defined in claim 9 wherein said support means is comprised of oppositely disposed protuberances on the inner wall of said outer sleeve in engagement with the outer wall of said inner sleeve.
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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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |