US3643701A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency monowall tube repair kit
Assignee: Foster Wheeler Inc
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Filing: 1970-09-14
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Granted: 1972-02-22
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Expires: 1990-09-14
Abstract
Abstract A quick temporary repair for a ruptured tube which is one of a number of parallel tubes making up a boiler furnace wall. The rupture is enlarged to form an opening large enough to accept a pipe having at each end a gasket, which may be compressed axially and consequently to expand radially to engage the sidewalls of the tube so that the water or steam will pass through the pipe rather than pass out of the rupture.
Inventors
- 👤 Michael Wadiak
- 👤 George T Higham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:50
CPC Classifications
F; F28; F28F; F28F11/00; F28F11/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49718; Y10T29/49732; Y10T29/49734
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
176 words
The method of sealing a tube ruptured at the sidewall comprising the steps of enlarging the rupture into an opening large enough to perform the following steps: placing in said opening one end of a pipe which has adjacent to each end a collar encircling and threadedly engaged to said pipe, a ring encircling said pipe closer to said end than said collar, and an annular deformable gasket encircling said pipe between said collar and said ring, placing one end of said pipe in said opening, moving said pipe axially in one direction until said one end is beyond said opening and the other end can be moved into said opening, moving said other end into said opening, moving said pipe axially in the opposite direction until said gaskets are on either end of said opening with said collars accessible through said opening, rotating said collars to compress said gaskets against said rings to cause said gaskets to expand radially and engage tightly the outside surface of said pipe and the inside surface of said tube.
Claim 2
Independent Claim
176 words
The method of sealing a tube ruptured at the sidewall comprising the steps of enlarging the rupture into an opening large enough to perform the following steps: placing in said opening one end of a pipe which has adjacent to each end a collar encircling and threadedly engaged to said pipe, a ring encircling said pipe closer to said end than said collar, and an annular deformable gasket encircling said pipe between said collar and said ring, placing one end of said pipe in said opening, moving said pipe axially in one direction until said one end is beyond said opening and the other end can be moved into said opening, moving said other end into said opening, moving said pipe axially in the opposite direction until said gaskets are on either end of said opening with said collars accessible through said opening, rotating said collars to compress said gaskets against said rings to cause said gaskets to expand radially and engage tightly the outside surface of said pipe and the inside surface of said tube.
Claim 3
Dependent Claim
32 words
The method defined in claim 5 wherein said collar is rotated by inserting an instrument in a recession in said collar and rotating said instrument about the longitudinal axis of said pipe.
References Cited (Backward Citations)
US2731041A
Cited
US3183939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |