US4372905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a pipe socket
Assignee: Forsheda Gummifabrik AB
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Filing: 1980-12-30
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Granted: 1983-02-08
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Expires: 2000-12-30
Abstract
Abstract The invention relates to a method of forming a pipe socket having a sealing ring (8) at the inner surface of the pipe socket wall. The sealing ring has a fastening portion (16) and a sealing portion (20) connected therewith. The sealing portion (20) is displaceable in the axial direction of the pipe socket to be able to take different positions therein in order to adapt to different tolerances. It is a problem that the sealing portion (20) because of its displacability is not adapted to constitute such a surface around which the pipe wall can be formed. In order to obviate this drawback the pipe wall is formed so that the sealing portion (20) is positioned outside the pipe socket during the forming operation, whereupon the sealing portion is folded into the pipe socket after the forming operation.
Inventors
- 👤 Nils-Erik Bohman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:46
CPC Classifications
F; F16; F16L; F16L17/00; F16L17/02; F16L17/03; F16L17/032; B; B29; B29C; B29C70/00; B29C70/68; B29C70/74; B29C70/742; B29C70/745; B29C33/00; B29C33/12; B29C53/00; B29C53/56; B29C53/58; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863; Y10T29/4987; Y10T29/4998; Y10T29/49982
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
147 words
A method of forming a pipe socket having a sealing ring positioned at the inner surface of the wall of the pipe socket, said sealing ring having a fastening portion and a sealing portion connected therewith, the pipe wall being formed around a substantially cylindrical formed surface, characterized in that the sealing ring (8) is positioned around the form surface with the fastening portion (16) and the sealing portion (20) positioned axially adjacent each other, that the pipe wall (24) is formed around the form surface and the fastening portion of the sealing ring while leaving at least the main portion of the sealing portion outside the end of the pipe wall and that the sealing portion is folded against the inner side of the pipe wall after the pipe wall has been removed from the form surface with the fastening portion retained in the pipe wall.
Claim 2
Independent Claim
147 words
A method of forming a pipe socket having a sealing ring positioned at the inner surface of the wall of the pipe socket, said sealing ring having a fastening portion and a sealing portion connected therewith, the pipe wall being formed around a substantially cylindrical formed surface, characterized in that the sealing ring (8) is positioned around the form surface with the fastening portion (16) and the sealing portion (20) positioned axially adjacent each other, that the pipe wall (24) is formed around the form surface and the fastening portion of the sealing ring while leaving at least the main portion of the sealing portion outside the end of the pipe wall and that the sealing portion is folded against the inner side of the pipe wall after the pipe wall has been removed from the form surface with the fastening portion retained in the pipe wall.
Claim 3
Dependent Claim
52 words
A method as claimed in claim 1, characterized in that a surface (30) which conically widens in the direction from the end of the pipe wall is formed at the inner side of the pipe wall, said surface being adapted to co-operate with the sealing portion (20) of the sealing ring (8).
Claim 4
Dependent Claim
48 words
A method as claimed in claim 2, characterized in that said substantially conical surface (30) is formed by means of a separate mould portion (6) which together with the sealing ring (8) is stretched over a mandrel (2) in order to constitute a part of the form surface.
Claim 5
Dependent Claim
34 words
A method as claimed in claim 3, characterized in that the separate mould portion (6) and the sealing ring (8) are positioned in engagement with each other when being stretched over the mandrel (2).
References Cited (Backward Citations)
US3510140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-07 | 1986-08-09 | 1987-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-07 | 1990-08-09 | 1991-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-07 | 1994-08-09 | 1995-02-08 | $7700.00 | Window Closed / Lapsed |