US3656784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slip joint
Assignee: Senior Operations Inc
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Filing: 1970-04-01
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Granted: 1972-04-18
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Expires: 1990-04-01
Abstract
Abstract An adjustable slip joint adapted to be interposed in a tubular structure which may be varied in length due to exposure to very high temperatures and is normally under pressure. The joint includes telescoping first and second tubular members forming the tubular structure wherein a sealing means is interposed between the respective members. The sealing means is to prevent excessive pressure leakage from said tubular structure through said joint.
Inventors
- 👤 Robert W Dow
- 👤 Arthur L Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:50
CPC Classifications
F; F16; F16L; F16L17/00; F16L17/02; F01; F01N; F01N13/00; F01N13/18; F01N13/1805; F01N13/1811; F16L21/00; F16L21/02; F16L21/035; F16L27/00; F16L27/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
234 words
An adjustable slip joint adapted to be interposed in a pressurized tubular structure to vary the overall length of said tubular structure depending upon lateral or axial expansion due to internal heat and to prevent pressure leakage from within said structure, comprising: a first annular tube member, a second annular tube member telescopingly interfitted within said first annular tube member, said tubes forming said tubular structure and having a longitudinal axis, said first annular tube member including an enlarged diameter end portion thereby creating an annular space between said end portion and said second annular tube member when said tubes are in telescoping relationship, a pair of spaced apart annular projections extending radially outwardly from said second annular tube member into said annular space, and defining a seat therebetween, an annular gland type packing seal mounted in and at least a portion thereof bearing against said seat and said real bearing against said end portion of said first tube member, and a resilient split ring spring embodying a portion positioned within said seat and another portion overlying one of the annular projections and the portion within said seat bearable against said second annular tube member and exerting continuous radial outward pressure normal to said longitudinal axis against said seal biasing said seal against said end portion to prevent internal leakage from said tubular structure whether said structure is in a static condition or expanding.
Claim 2
Dependent Claim
234 words
An adjustable slip joint adapted to be interposed in a pressurized tubular structure to vary the overall length of said tubular structure depending upon lateral or axial expansion due to internal heat and to prevent pressure leakage from within said structure, comprising: a first annular tube member, a second annular tube member telescopingly interfitted within said first annular tube member, said tubes forming said tubular structure and having a longitudinal axis, said first annular tube member including an enlarged diameter end portion thereby creating an annular space between said end portion and said second annular tube member when said tubes are in telescoping relationship, a pair of spaced apart annular projections extending radially outwardly from said second annular tube member into said annular space, and defining a seat therebetween, an annular gland type packing seal mounted in and at least a portion thereof bearing against said seat and said real bearing against said end portion of said first tube member, and a resilient split ring spring embodying a portion positioned within said seat and another portion overlying one of the annular projections and the portion within said seat bearable against said second annular tube member and exerting continuous radial outward pressure normal to said longitudinal axis against said seal biasing said seal against said end portion to prevent internal leakage from said tubular structure whether said structure is in a static condition or expanding.
Claim 3
Dependent Claim
42 words
An adjustable slip joint as defined in claim 1 wherein said spring portion includes a vertical leg positioned within said seat and said another portion includes a horizontal leg bent at a right angle thereto and overlying one of the annular projections.
Claim 4
Dependent Claim
21 words
An adjustable slip joint as defined in claim 2 wherein said horizontal leg exerts outward radial pressure against said sealing means.
Claim 5
Dependent Claim
53 words
An adjustable slip joint as defined in claim 1 wherein the thermal coefficient of expansion of said first annular tube member is less than the thermal coefficient of expansion of said second annular tube member thereby creating a more effective seal surface on said end portion for engagement by said annular sealing means.
Claim 6
Dependent Claim
35 words
An adjustable slip joint as defined in claim 1 wherein the annular gland type packing seal includes a larger surface area of contact against said end portion than an opposed surface area within said seat.
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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |