US4902048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joint structure for jointing metal pipes at their ends
Assignee: Usui Kokusai Sangyo Kaisha Ltd
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Filing: 1988-03-24
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Granted: 1990-02-20
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Expires: 2008-03-24
Abstract
Abstract Herein disclosed is a joint structure for jointing the ends of two pipes to each other. One pipe has its one end portion formed with a plurality of slots arrayed circumferentially in its wall and with an inward projecting annular wall or a tapered annular wall positioned axially inside the slots to provide a receiving seat surface facing the other pipe. This other pipe is formed generally at its tip with a reduced annular wall providing a pushing seat surface and with at least one engagement groove positioned axially at the back of the reduced annular wall and extending in the circumference. These two pipes are jointed together by holding the inward projecting or tapered annular wall in abutment against the seat surface of the reduced annular wall, by fastening that one pipe at its portions of the slots in the engagement groove to reduce and deform it.
Inventors
- 👤 Katsushi Washizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:15
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/14; F16L21/00; F16L21/08; F16L17/00; F16L17/02; F16L17/04; Y; Y10; Y10S; Y10S285/00; Y10S285/915
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
228 words
A joint structure for joining ends of first and second metal pipes, said first pipe having a first annular seating means spaced from the end thereof and defining a smaller cross section than said end, and a plurality of slots arrayed circumferentially in the wall of said first pipe intermediate the end thereof and the first annular seating means; the second pipe having second annular seating means formed generally at its end, the portion of said second pipe adjacent said end being disposed in the end of the first pipe such that the second seating means is abutting against said first seating means, at least one inwardly formed engagement groove formed in the circumferential wall of said second pipe axially spaced from said second seating means and in line with said slots, annular engagement means disposed in said second pipe, said first pipe further being formed with a retaining pawl projecting inwardly and axially away from the end of said first pipe to retain said annular engagement means of said second pipe, and fastening means for deforming the portions of said slots radially inwardly and into said engagement groove to securely join said pipes together, wherein said first pipe is axially pulled by the deformation caused by the fastening means to generate a facial pressure between said first and second seating means thereby to tightly join said pipes.
Claim 2
Dependent Claim
228 words
A joint structure for joining ends of first and second metal pipes, said first pipe having a first annular seating means spaced from the end thereof and defining a smaller cross section than said end, and a plurality of slots arrayed circumferentially in the wall of said first pipe intermediate the end thereof and the first annular seating means; the second pipe having second annular seating means formed generally at its end, the portion of said second pipe adjacent said end being disposed in the end of the first pipe such that the second seating means is abutting against said first seating means, at least one inwardly formed engagement groove formed in the circumferential wall of said second pipe axially spaced from said second seating means and in line with said slots, annular engagement means disposed in said second pipe, said first pipe further being formed with a retaining pawl projecting inwardly and axially away from the end of said first pipe to retain said annular engagement means of said second pipe, and fastening means for deforming the portions of said slots radially inwardly and into said engagement groove to securely join said pipes together, wherein said first pipe is axially pulled by the deformation caused by the fastening means to generate a facial pressure between said first and second seating means thereby to tightly join said pipes.
Claim 3
Dependent Claim
28 words
A joint structure according to claim 1, wherein said first seating means is an inward projecting annular wall whereas said second seating means is a reduced annular wall.
Claim 4
Dependent Claim
27 words
A joint structure according to claim 1, wherein said first seating means is a tapered annular wall whereas said second seating means is a reduced annular wall.
Claim 5
Dependent Claim
15 words
A joint structure according to claim 1, wherein the fastening means comprises a binding band.
Claim 6
Dependent Claim
16 words
A joint structure according to claim 1, wherein said engagement means is an annular engagement groove.
Claim 7
Dependent Claim
15 words
A joint structure according to claim 1, wherein said engagement means is an annular ridge.
Claim 8
Dependent Claim
23 words
A joint structure according to claim 1, wherein a sealing means is provided between said first seating means and said second seating means.
Claim 9
Dependent Claim
15 words
A joint structure according to claim 7, wherein said sealing means is a sealing agent.
Claim 10
Dependent Claim
16 words
A joint structure according to claim 7, wherein said sealing means is a resilient sealing member.
Claim 11
Dependent Claim
14 words
A joint structure according to claim 7, wherein said sealing means is a O-ring.
Claim 12
Dependent Claim
212 words
A joint structure for joining first and second metal pipes adjacent ends thereof, said first pipe having a first annular seating means spaced from the end thereof and defining a smaller cross section than said end, a plurality of slots arrayed circumferentially in the wall of said first pipe intermediate the end thereof and the first annular seating means and at least one inwardly extending pawl direct away from the end of the first pipe, the second pipe having a second annular seating means formed generally at its end, the portion of said second pipe adjacent the end being disposed within the end of the first pipe such that the second seating means is abutting against said first seating means, at least one inwardly formed engagement groove in the circumferential wall of said second pipe axially spaced from said second seating means and in line with the slots of said first pipe, said second pipe further defining an annular engagement means generally facing the end of the first pipe and engaged by the pawl of the first pipe, and fastening means for deforming the portions of said first pipe adjacent said slots radially inwardly and into said engagement groove of said second pipe to securely join said first and second pipes together.
Claim 13
Dependent Claim
212 words
A joint structure for joining first and second metal pipes adjacent ends thereof, said first pipe having a first annular seating means spaced from the end thereof and defining a smaller cross section than said end, a plurality of slots arrayed circumferentially in the wall of said first pipe intermediate the end thereof and the first annular seating means and at least one inwardly extending pawl direct away from the end of the first pipe, the second pipe having a second annular seating means formed generally at its end, the portion of said second pipe adjacent the end being disposed within the end of the first pipe such that the second seating means is abutting against said first seating means, at least one inwardly formed engagement groove in the circumferential wall of said second pipe axially spaced from said second seating means and in line with the slots of said first pipe, said second pipe further defining an annular engagement means generally facing the end of the first pipe and engaged by the pawl of the first pipe, and fastening means for deforming the portions of said first pipe adjacent said slots radially inwardly and into said engagement groove of said second pipe to securely join said first and second pipes together.
Claim 14
Dependent Claim
20 words
A joint structure according to claim 11 wherein said engagement means of said second pipe is an annular engagement groove.
Claim 15
Dependent Claim
15 words
A joint structure according to claim 11 wherein said engagement means is an annular ridge.
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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) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |