US4044798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adhesive bonded hydrotest plug and method for using the same
Assignee: Babcock and Wilcox Co
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Filing: 1975-12-15
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Granted: 1977-08-30
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Expires: 1995-12-15
Abstract
Abstract The invention relates to a hydrotest plug useful in testing the structural integrity of pressure tube arrangements, piping and the like as well as a method for using the same. The hydrostatic test plug comprises a conventional plug with internal passages providing conduit means for injection of a fluid adhesive, air escape means and centering means.
Inventors
- 👤 Joel Gary Feldstein
- 👤 Jeffrey Forsha Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:53
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/10; F16L55/11; F16L55/1116; G; G01; G01M; G01M3/00; G01M3/02; G01M3/022; G01N; G01N3/00; G01N3/08; G01N3/10; G01N3/12
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
165 words
In a system using a test plug for testing the pressure integrity of that portion of a conduit member extending beyond the test plug, the conduit member being subjected to a fluid environment, the pressure characteristics of which vary from that of the environment surrounding the conduit member, the method of securing the test plug to the wall of the conduit member, the test plug having at least two internal passageways leading to the periphery of the test plug body, comprising: placing and centering the test plug in the conduit member, injecting a fluid adhesive through one of the passageways into an annular chamber between the periphery of the test plug and a wall of the conduit member while allowing gas to escape the annular chamber through another of the passageways, allowing the fluid adhesive to harden to form a fluid pressure tight bond between the test plug and the wall of the conduit member, and subjecting the conduit member to the fluid pressure environment.
Claim 2
Dependent Claim
165 words
In a system using a test plug for testing the pressure integrity of that portion of a conduit member extending beyond the test plug, the conduit member being subjected to a fluid environment, the pressure characteristics of which vary from that of the environment surrounding the conduit member, the method of securing the test plug to the wall of the conduit member, the test plug having at least two internal passageways leading to the periphery of the test plug body, comprising: placing and centering the test plug in the conduit member, injecting a fluid adhesive through one of the passageways into an annular chamber between the periphery of the test plug and a wall of the conduit member while allowing gas to escape the annular chamber through another of the passageways, allowing the fluid adhesive to harden to form a fluid pressure tight bond between the test plug and the wall of the conduit member, and subjecting the conduit member to the fluid pressure environment.
Claim 3
Dependent Claim
36 words
A method as in claim 1 wherein the fluid adhesive enters the annular chamber at one end of the plug body and the air escapes the annular chamber at the opposite end of the plug body.
References Cited (Backward Citations)
GB212715A
Cited
US1841974A
Cited
US2062527A
Cited
US2155602A
Cited
US2241526A
Cited
US2578728A
Cited
US2808852A
Cited
GB826429A
Cited
US3103235A
Cited
US3199598A
Cited
US3213674A
Cited
US3606913A
Cited
US3762446A
Cited
US3919880A
Cited
US3847694A
Cited
US3834422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-29 | 1981-02-28 | 1981-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-29 | 1985-02-28 | 1985-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-29 | 1989-02-28 | 1989-08-30 | $7700.00 | Window Closed / Lapsed |