US3830529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expansion joint for pipes
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1972-09-13
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Granted: 1974-08-20
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Expires: 1992-09-13
Abstract
Abstract An expansion joint for pipe systems, such as steam pipe systems, including a leak-proof, pressure resistant, flexible bellows joined to the opposed spaced ends of adjacent substantially coaxial pipes, a tie-rod connected to the ends of the adjacent pipes by means of fixing plates affixed to recesses in the ends of the pipes, said tie rod extending substantially parallel to the axes of the pipes and a cover member affixed to the bellows and to the fixing plates so as to enclose said tie-rod where it extends axially beyond the bellows.
Inventors
- 👤 W Domer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:03
CPC Classifications
F; F16; F16L; F16L51/00; F16L51/02; F16L51/022; F16L51/03
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
164 words
A leak-proof expansion joint for pipe systems subject to variable temperatures comprising pipe members having ends spaced adjacent each other, each pipe member having a curved wall portion, said joint including a leak-prof, pressure resistant, flexible bellows member surrounding and welded to the spaced ends of adjacent pipes, said spaced ends each having an opposed recess extending inwardly in the curved wall of the pipe, a fixing plate secured in each recess and means securing said plates in said recesses, a tie rod extending parallel to the axes of the adjacent pipes when in the normal cool coaxial position, said tie rod having means securing it at each end to the fixing plates secured in the recesses of the adjacent pipe ends, said tie rod and associated fixing plates extending beyond and outside of the lateral boundaries of said bellows member surrounding the exposed portions of said tie rod and having means securing it to said bellows member and to the associated fixing plates.
Claim 2
Dependent Claim
164 words
A leak-proof expansion joint for pipe systems subject to variable temperatures comprising pipe members having ends spaced adjacent each other, each pipe member having a curved wall portion, said joint including a leak-prof, pressure resistant, flexible bellows member surrounding and welded to the spaced ends of adjacent pipes, said spaced ends each having an opposed recess extending inwardly in the curved wall of the pipe, a fixing plate secured in each recess and means securing said plates in said recesses, a tie rod extending parallel to the axes of the adjacent pipes when in the normal cool coaxial position, said tie rod having means securing it at each end to the fixing plates secured in the recesses of the adjacent pipe ends, said tie rod and associated fixing plates extending beyond and outside of the lateral boundaries of said bellows member surrounding the exposed portions of said tie rod and having means securing it to said bellows member and to the associated fixing plates.
Claim 3
Dependent Claim
18 words
An expansion joint as claimed in claim 1 in which the tie rod securing means is a weld.
Claim 4
Dependent Claim
19 words
An expansion joint as claimed in claim 1, in which the tie rod securing means is a screw connection.
Claim 5
Dependent Claim
19 words
An expansion joint as claimed in claim 1, in which the tie rod securing means is a bayonet connection.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |