Patent US503674A successfully refreshed from Google Patents.
Patent US4186932A successfully refreshed from Google Patents.
US4186932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resilient sealing ring
Assignee: Sulzer AG
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Filing: 1978-07-10
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Granted: 1980-02-05
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Expires: 1998-07-10
Abstract
Abstract The sealing ring is initially made with two arms which are oriented to define a fold. When in place between two overlapping pipes, the inwardly directed arm is rolled outwardly into coaxial relation with the unfolded arm in order to provide a tight seal between the two pipes. The seal ring may be initially formed with a U-shaped cross-section or with a cross-section in which one arm is disposed transverse to the other arm.
Inventors
- 👤 Roland Emhardt
- 👤 Erich Wachter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:45
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/02; F16L21/022
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
86 words
A resilient sealing ring for sealing an annular gap between two overlapping tubes disposed in coaxial moveable relation, said ring having a predetermined cross sectional shape including a pair of arms disposed in folded relation to each other to define a fold therebetween with at least one of said arms being disposed axially of said ring and a second of said arms being foldable into coaxial relation to said one arm to dispose facing sides of said arms in resilient contact with one of the tubes.
Claim 2
Dependent Claim
86 words
A resilient sealing ring for sealing an annular gap between two overlapping tubes disposed in coaxial moveable relation, said ring having a predetermined cross sectional shape including a pair of arms disposed in folded relation to each other to define a fold therebetween with at least one of said arms being disposed axially of said ring and a second of said arms being foldable into coaxial relation to said one arm to dispose facing sides of said arms in resilient contact with one of the tubes.
Claim 3
Dependent Claim
16 words
A resilient sealing ring as set forth in claim 1 wherein said shape is a U-shape.
Claim 4
Dependent Claim
19 words
A resilient sealing ring as set forth in claim 1 wherein each arm is disposed axially of said ring.
Claim 5
Dependent Claim
31 words
A resilient sealing ring as set forth in claim 1 which is made of extruded strip form with a pair of ends disposed in abutted and secured relation to each other.
Claim 6
Dependent Claim
92 words
In combination an inner tube, an outer tube disposed in overlapping movable coaxial relation with said inner tube to define an annular gap therewith, and a resilient sealing ring disposed between said tubes in sealing relation therewith to seal said gap, said sealing ring including an annular bead at one end secured to one of said tubes, a first annular arm extending from said bead and a second annular arm unfolded from said first arm and extending coaxially along said tubes in sealing contact with at least the other of said tubes.
Claim 7
Dependent Claim
92 words
In combination an inner tube, an outer tube disposed in overlapping movable coaxial relation with said inner tube to define an annular gap therewith, and a resilient sealing ring disposed between said tubes in sealing relation therewith to seal said gap, said sealing ring including an annular bead at one end secured to one of said tubes, a first annular arm extending from said bead and a second annular arm unfolded from said first arm and extending coaxially along said tubes in sealing contact with at least the other of said tubes.
Claim 8
Dependent Claim
30 words
The combination as set forth in claim 5 wherein said inner tube has an annular retaining groove in an outer surface thereof and said bead is secured in said groove.
Claim 9
Dependent Claim
17 words
The combination as set forth in claim 5 wherein said one tube has an annular centering groove.
Claim 10
Dependent Claim
18 words
The combination as set forth in claim 7 wherein said arm extends to and abuts said centering groove.
Claim 11
Dependent Claim
24 words
The combination as set forth in claim 5 wherein said one tube has an annular groove defining an end stop for said other tube.
Claim 12
Dependent Claim
117 words
In combination an inner tube having a raised edge at one end with a predetermined outer diameter, an annular retaining groove adjacent said raised edge and an annular center bead on an outer surface spaced from said retaining groove; an outer tube disposed in overlapping coaxial relation with said inner tube; and a resilient sealing ring disposed between said tubes, said ring having an annular bead secured in said retaining groove, a first annular arm extending from said bead coaxially of said tubes and having an outer surface co-planar with said raised edge, and a second annular unfolded arm extending from said first arm to said center bead and disposed in resilient sealing engagement with said tubes.
Claim 13
Dependent Claim
117 words
In combination an inner tube having a raised edge at one end with a predetermined outer diameter, an annular retaining groove adjacent said raised edge and an annular center bead on an outer surface spaced from said retaining groove; an outer tube disposed in overlapping coaxial relation with said inner tube; and a resilient sealing ring disposed between said tubes, said ring having an annular bead secured in said retaining groove, a first annular arm extending from said bead coaxially of said tubes and having an outer surface co-planar with said raised edge, and a second annular unfolded arm extending from said first arm to said center bead and disposed in resilient sealing engagement with said tubes.
Claim 14
Dependent Claim
20 words
The combination as set forth in claim 10 wherein said arms and said inner tube define an enclosed annular chamber.
Claim 15
Dependent Claim
44 words
The combination as set forth in claim 10 wherein said inner tube further includes a second annular bead of greater diameter than said outer tube to define an end stop for said outer tube and wherein said outer tube abuts said second annular bead.
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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) | 1983-02-04 | 1983-08-06 | 1984-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-04 | 1987-08-06 | 1988-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-04 | 1991-08-06 | 1992-02-05 | $7700.00 | Window Closed / Lapsed |