US3705734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for compensating for changes in the length of pipes and the like
Assignee: Gebrueder Boehler and Co AG
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Filing: 1970-05-13
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Granted: 1972-12-12
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Expires: 1990-05-13
Abstract
Abstract Arrangement for compensating for changes in the lengths of pipes subjected to high operative temperatures. One of the two pipe portions at a joint between them extends into the other, and a flexible pleated sleeve surrounds the inner pipe portion, the space between the pleated sleeve and the inner pipe being dead ended at a location remote from the zone at which the two main portions of the pipes confront each other. The arrangement includes means for cooling the space within the pleated sleeve, and means selectively to heat such space and its contents, as at the start of an operation, to melt any solid material which may be in the space within the pleated sleeve.
Inventors
- 👤 Gundolf E Rajakovics
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:05
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/14; F16L59/16; F16L59/21; F16L27/00; F16L27/12; F16L51/00; F16L51/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
248 words
A joint adapted for use between two aligned pipes subjected to high temperatures in operation, The joint permitting lengthwise movement of the pipes relative to each other, said joint comprising at least substantially coaxial end portions of the two pipes, a part of the end portion of a first pipe being telescoped over the end portion of the second pipe to form an annular space of substantial axial length between said end portions of the pipes, said annular space communicating with the space within the pipes, and a flexible annularly pleated sleeve of substantial axial length telescoped over the end portion of the second pipe, one end of the pleated sleeve being connected and sealed to the first pipe adjacent the end thereof at the joint, and the other end of the pleated sleeve being connected and sealed to the second pipe, means to cool the annular space between said telescoped end portions of the pipes, and thus the material within such space, said cooling means comprising cooling fins attached to and projecting radially outwardly in axial planes from the end portion of the first end pipe surrounding said annular space, and means for selectively heating the annular space between said end portions of the pipes and to heat the spaces between the walls of the flexible pleated sleeve and the end portion of the second pipe, thereby melting solid material in said spaces before operation of the apparatus of which the pipes and pipe joint are parts.
Claim 2
Dependent Claim
248 words
A joint adapted for use between two aligned pipes subjected to high temperatures in operation, The joint permitting lengthwise movement of the pipes relative to each other, said joint comprising at least substantially coaxial end portions of the two pipes, a part of the end portion of a first pipe being telescoped over the end portion of the second pipe to form an annular space of substantial axial length between said end portions of the pipes, said annular space communicating with the space within the pipes, and a flexible annularly pleated sleeve of substantial axial length telescoped over the end portion of the second pipe, one end of the pleated sleeve being connected and sealed to the first pipe adjacent the end thereof at the joint, and the other end of the pleated sleeve being connected and sealed to the second pipe, means to cool the annular space between said telescoped end portions of the pipes, and thus the material within such space, said cooling means comprising cooling fins attached to and projecting radially outwardly in axial planes from the end portion of the first end pipe surrounding said annular space, and means for selectively heating the annular space between said end portions of the pipes and to heat the spaces between the walls of the flexible pleated sleeve and the end portion of the second pipe, thereby melting solid material in said spaces before operation of the apparatus of which the pipes and pipe joint are parts.
Claim 3
Dependent Claim
97 words
A joint according to claim 1, wherein the main portions of the two pipes are of generally the same diameter, the end portions of the two pipes are substantially coaxial, and the end portion of the first pipe includes a generally radially outwardly directed annular flange connected to the end of the main portion of the first pipe, and a cylindrical sleeve forming an extension of the first pipe sealingly connected to the outer edge of said annular flange, the said cylindrical sleeve being telescoped over the end portion of the second pipe and radially spaced therefrom.
Claim 4
Dependent Claim
91 words
A joint according to claim 2, wherein the end portion of the second pipe includes a generally radially outwardly directed second annular flange connected to the end of the main portion of the second pipe, and a second cylindrical sleeve telescoped over the end of the main portion of the second pipe and sealingly connected to the outer edge of the second annular flange, the said second cylindrical sleeve being telescoped within the first cylindrical sleeve and forming therewith said annular axially elongated space communicating with the interiors of the pipes.
Claim 5
Dependent Claim
20 words
A joint according to claim 3, wherein the first and second flanges are parallel and spaced axially from each other.
Claim 6
Dependent Claim
34 words
A joint according to claim 3, wherein the heating means for the joint is disposed within a second annular axially elongated space, which is formed between the second pipe and the second cylindrical sleeve.
Claim 7
Dependent Claim
33 words
A joint according to claim 5, comprising heat insulating material packed into said second annular space, and wherein the said heating means includes electrical resistance means distributed axially in said second annular space.
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) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |