US3899183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide-proof bell and spigot joint for pipes and tubular elements
Assignee: Rheinstahl AG
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Filing: 1973-11-26
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Granted: 1975-08-12
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Expires: 1993-11-26
Abstract
Abstract A seal ring is interposed between the bell and the spigot and, outwardly of the seal ring, the front end portion of the bell is formed with angularly spaced radial recesses in its inner surface which decrease in radial depth axially toward the end surface of the bell and circumferentially of the bell. Respective wedge shape pieces are inserted axially into the recesses and are firmly seated therein by relative movement circumferentially of the bell. The wedge shape pieces extend axially of the bell and have respective noses projecting from the associated recesses and teeth engaging the spigot end portion and extending substantially circumferentially of the joint. The noses have flange-like projections which extend radially outwardly and parallel to the end surface of the bell, and the axial extent of the wedge shape pieces is of the order of their circumferential extent.
Inventors
- 👤 Max Wild
- 👤 Wolf-Dieter Schneider
- 👤 Friedel Sennlaub
- 👤 Rudolf Winter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:02
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/08; F16L37/084; F16L37/092; F16L37/0925; F16L37/0927
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
131 words
In a slide-proof bell and spigot joint, for pipes and tubular elements, of the type having a seal ring between the bell and the spigot and securing elements located axially outwardly of the seal ring and pressed against the spigot end portion, the improvement comprising, in combination, the outer end portion of the bell being formed with angularly spaced radial recesses in its inner surface which decrease in radial depth axially toward the outer end surface of the bell and circumferentially of the bell; and respective wedge shape pieces inserted axially into said recesses and firmly seated therein by relative movement circumfErentially of the bell; said wedge shape pieces having a nose projecting from the associated recess and teeth engaging the spigot end portion and extending substantially circumferentially of the joint.
Claim 2
Dependent Claim
131 words
In a slide-proof bell and spigot joint, for pipes and tubular elements, of the type having a seal ring between the bell and the spigot and securing elements located axially outwardly of the seal ring and pressed against the spigot end portion, the improvement comprising, in combination, the outer end portion of the bell being formed with angularly spaced radial recesses in its inner surface which decrease in radial depth axially toward the outer end surface of the bell and circumferentially of the bell; and respective wedge shape pieces inserted axially into said recesses and firmly seated therein by relative movement circumfErentially of the bell; said wedge shape pieces having a nose projecting from the associated recess and teeth engaging the spigot end portion and extending substantially circumferentially of the joint.
Claim 3
Dependent Claim
69 words
In a slide-proof bell and spigot joint, for pipes and tubular elements, of the type having a seal ring between the bell and the spigot and securing elements located axially outwardly of the seal ring and pressed against the spigot end portion, according to claim 1, in which said wedge shape pieces have an extent, axially of the joint, of the order of their extent circumferentially of the joint.
Claim 4
Dependent Claim
69 words
In a slide-proof bell and spigot joint, for pipes and tubular elements, of the type having a seal ring between the bell and the spigot and securing elements located axially outwardly of the seal ring and pressed against the spigot end portion, according to claim 1, in which said wedge shape pieces have an extent, axially of the joint, which is greater than their extent circumferentially of the joint.
Claim 5
Dependent Claim
70 words
In a slide-proof bell and spigot joint, for pipes and tubular elements, of the type having a seal ring between the bell and the spigot and securing elements located axially outwardly of the seal ring and pressed against the spigot end portion, according to claim 1, in which said wedge shape pieces have an extent, axially of the joint, which is slightly smaller than their extent circumferentially of the joint.
Claim 6
Dependent Claim
74 words
In a slide-proof bell and spigot joint, for pipes and tubular elements, of the type having a seal ring between the bell and the spigot and securing elements located axially outwardly of the seal ring and pressed against the spigot end portion, according to claim 1, in which the nose of each wedge shape piece is formed with a flange-like projection extending radially outwardly therefrom and parallel to the end surface of the bell.
Claim 7
Dependent Claim
119 words
In a slide-proof bell and spigot joint, for pipes and tubular elements, of the type having a seal ring between the bell and the spigot and securing elements located axially outwardly of the seal ring and pressed against the spigot end portion, according to claim 1, in which said radially outer surfaces of said recesses tapering toward the inner surface of the bell axially toward the outer end of the bell, and tapering toward the inner surface of the bell circumferentially of the bell, are of a spherical shape; the radially outer surfaces of said wedge shape pieces having a conforming spherical shape; the toothed radially inner surfaces of said wedge shape pieces being arcuate axially of the joint.
Claim 8
Dependent Claim
92 words
In a slide-proof bell and spigot joint, for pipes and tubular elements, of the type having a seal ring between the bell and the spigot and securing elements located axially outwardly of the seal ring and pressed against the spigot end portion, according to claim 1, in which, at the wider circumferential end of each recess, a respective opening is formed in the end surface of the bell and has a size corresponding to said wedge shape pieces; said openings serving for introduction of the wedge shape pieces therethrough into said recesses.
Claim 9
Dependent Claim
71 words
In a slide-proof ball and spigot joint, for pipes and tubular elements, of the type having a seal ring between the bell and the spigot and securing elements located axially outwardly of the seal ring and pressed against the spigot end portion, according to claim 1, in which said bell has a chamber receiving said seal ring; and a radially inwardly extending annular wall separating said chamber axially from said recesses.
Claim 10
Dependent Claim
74 words
In a slide-proof bell and spigot joint, for pipes and tubular elements, of the type having a seal ring between the bell and the spigot and securing elements located axially outwardly of the seal ring and pressed against the spigot end portion, according to claim 1, in which said bell is formed with a recess receiving said seal ring; and a ring inserted into said bell and separating said chamber axially from said recesses.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |