Patent US3712648A successfully refreshed from Google Patents.
US3712648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-anchorable pipe joint
Assignee: Stanton and Staveley Ltd
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Filing: 1970-08-17
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Granted: 1973-01-23
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Expires: 1990-08-17
Abstract
Abstract In self-anchorable pipe joints, of the kind in which a spigot at the end of one pipe is inserted into a socket at the end of the other pipe, a sealing member of tapered cross-section is placed under axial compression in the annular gap between the spigot and socket, the outer, transverse face of the sealing member is initially inclined relative to the axis of the sealing member. There is also provided an annular self-anchorable member for use in a self-anchorable pipe joint, having an anchoring face at about 60* to its axis. A pipe joint as disclosed is more resistant to leakage on angular misalignment than previous joints.
Inventors
- 👤 N Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 05:48
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/12; F16L27/127; F16L27/1275; F16L27/12751
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
429 words
In a spigot and socket joint comprising, a spigot having a longitudinal axis of extension, and including a circumferential exterior surface extending generally along said axis; said spigot including an inlet which is inserted into a socket; a socket having an axis of extension substantially parallel to said spigot axis; said socket having an inlet; said socket including an opening extending back from said inlet, which said opening is defined by the surrounding socket wall; said socket wall being spaced away from said spigot surface and surrounding said spigot inlet and surface to define an annular gap therebetween; said surrounding socket wall including a tapered portion which tapers inwardly toward said spigot inlet, thereby tapering said annular gap; a resilient sealing member interposed in said annular gap and including a surface which engages said socket wall tapered portion and engages that portion of said spigot exterior surface opposed to said socket wall tapered portion; said resilient member having a tapered shape to conform to the aforesaid tapered shape of said annular gap; said resilient member having a transverse surface facing away from said spigot inlet; a compressive member carried by and attached to said joint and having a pressure face positioned such that it is moved into engagement with said resilient member transverse surface to axially compress said resilient member; the improvement comprising, when said pressure face of said compressive member is moved into engagement with said resilient member transverse surface, said pressure face is oriented and positioned so as to be at a predetermined incline with respect to said resilient member transverse surface and so as to bear initially upon that radially inmost portion of said transverse surface that is closest to said spigot exterior surface, anchoring means communicating with both of said spigot and said socket to secure them together and prevent axial separation thereof, each of said spigot and said socket having an abutment extending into said annular gap; said anchoring means comprising an annular self-anchoring member which engages said abutments and thereby prevents axial separation, said socket abutments comprise a surface inclined at an angle of 60* - 70* to said socket axis and inclined, measuring into said annular gap, toward said socket inlet, said anchoring member including an abutting surface that abuts against said socket abutment surface; said anchoring member being shaped such that its said abutting surface is inclined at an angle with respect to said socket axis that is less than the angle of incline of said socket abutment surface, such that the angle formed between these said surfaces is approximately 5*.
Claim 2
Dependent Claim
429 words
In a spigot and socket joint comprising, a spigot having a longitudinal axis of extension, and including a circumferential exterior surface extending generally along said axis; said spigot including an inlet which is inserted into a socket; a socket having an axis of extension substantially parallel to said spigot axis; said socket having an inlet; said socket including an opening extending back from said inlet, which said opening is defined by the surrounding socket wall; said socket wall being spaced away from said spigot surface and surrounding said spigot inlet and surface to define an annular gap therebetween; said surrounding socket wall including a tapered portion which tapers inwardly toward said spigot inlet, thereby tapering said annular gap; a resilient sealing member interposed in said annular gap and including a surface which engages said socket wall tapered portion and engages that portion of said spigot exterior surface opposed to said socket wall tapered portion; said resilient member having a tapered shape to conform to the aforesaid tapered shape of said annular gap; said resilient member having a transverse surface facing away from said spigot inlet; a compressive member carried by and attached to said joint and having a pressure face positioned such that it is moved into engagement with said resilient member transverse surface to axially compress said resilient member; the improvement comprising, when said pressure face of said compressive member is moved into engagement with said resilient member transverse surface, said pressure face is oriented and positioned so as to be at a predetermined incline with respect to said resilient member transverse surface and so as to bear initially upon that radially inmost portion of said transverse surface that is closest to said spigot exterior surface, anchoring means communicating with both of said spigot and said socket to secure them together and prevent axial separation thereof, each of said spigot and said socket having an abutment extending into said annular gap; said anchoring means comprising an annular self-anchoring member which engages said abutments and thereby prevents axial separation, said socket abutments comprise a surface inclined at an angle of 60* - 70* to said socket axis and inclined, measuring into said annular gap, toward said socket inlet, said anchoring member including an abutting surface that abuts against said socket abutment surface; said anchoring member being shaped such that its said abutting surface is inclined at an angle with respect to said socket axis that is less than the angle of incline of said socket abutment surface, such that the angle formed between these said surfaces is approximately 5*.
Claim 3
Dependent Claim
188 words
In a spigot and socket joint comprising, a spigot, including a circumferential exterior surface that is inserted into a socket; a socket having an axis of extension, said socket including an inlet and including an opening extending back from said inlet, that is defined by a surrounding socket wall; said spigot being inserted into said socket opening; said socket surrounding wall including an annular groove; Said spigot circumferential surface including a annular groove, said annular grooves being so positioned relative to each other as to receive an annular anchoring member which is sprung into both said grooves, thereby to prevent axial separation of said socket and said spigot; the improvement comprising, said socket groove being defined on the side thereof facing toward said socket inlet by a side wall which is inclined at an angle to said socket axis of 60* and 70*; said anchoring member including an abutting surface which abuts said socket groove inclined side wall and which anchoring member abutting surface is inclined at an angle to the socket axis of approximately 5* less than the angle of incline of said socket groove side wall.
Claim 4
Dependent Claim
188 words
In a spigot and socket joint comprising, a spigot, including a circumferential exterior surface that is inserted into a socket; a socket having an axis of extension, said socket including an inlet and including an opening extending back from said inlet, that is defined by a surrounding socket wall; said spigot being inserted into said socket opening; said socket surrounding wall including an annular groove; Said spigot circumferential surface including a annular groove, said annular grooves being so positioned relative to each other as to receive an annular anchoring member which is sprung into both said grooves, thereby to prevent axial separation of said socket and said spigot; the improvement comprising, said socket groove being defined on the side thereof facing toward said socket inlet by a side wall which is inclined at an angle to said socket axis of 60* and 70*; said anchoring member including an abutting surface which abuts said socket groove inclined side wall and which anchoring member abutting surface is inclined at an angle to the socket axis of approximately 5* less than the angle of incline of said socket groove side wall.
Claim 5
Dependent Claim
183 words
In a spigot and socket joint comprising, a spigot, including a circumferential exterior surface that is inserted into a socket; a socket having an axis of extension, said socket including an inlet and including an opening extending back from said inlet, that is defined by a surrounding socket wall; said spigot being inserted into said socket opening; said socket surrounding wall including an annular groove; said spigot circumferential surface including an annular groove, said annular grooves being so positioned relative to each other as to receive an annular anchoring member which is sprung into both said grooves, thereby to prevent axial separation of said socket and said spigot; the improvement comprising, said socket groove being defined on the side thereof facing toward said socket inlet by a side wall which is inclined at an angle to said socket axis of 60* to 70*; said anchoring member including an abutting surface which abuts said socket groove inclined side wall said abutting surface of said anchoring member being inclined to the socket axis and forming a sharply acute angle with the socket groove side wall.
Claim 6
Dependent Claim
183 words
In a spigot and socket joint comprising, a spigot, including a circumferential exterior surface that is inserted into a socket; a socket having an axis of extension, said socket including an inlet and including an opening extending back from said inlet, that is defined by a surrounding socket wall; said spigot being inserted into said socket opening; said socket surrounding wall including an annular groove; said spigot circumferential surface including an annular groove, said annular grooves being so positioned relative to each other as to receive an annular anchoring member which is sprung into both said grooves, thereby to prevent axial separation of said socket and said spigot; the improvement comprising, said socket groove being defined on the side thereof facing toward said socket inlet by a side wall which is inclined at an angle to said socket axis of 60* to 70*; said anchoring member including an abutting surface which abuts said socket groove inclined side wall said abutting surface of said anchoring member being inclined to the socket axis and forming a sharply acute angle with the socket groove side wall.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |