Patent US4078697A successfully refreshed from Google Patents.
US4078697A
Expired / Lapsed
US
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Method and apparatus for repairing protectively lined reactor vessels
Assignee: R GELB AND SONS Inc
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Filing: 1976-03-02
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Granted: 1978-03-14
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Expires: 1996-03-02
Abstract
Abstract Breaks in the lining of a protectively lined reactor vessel are repaired without introducing unwanted electrical paths through the vessel. Specifically, the breaks are repaired using a plug comprising an insulated anchor stud anchored into the portion of the metal support wall underlying the break; a sealing gasket disposed on the portion of the protective lining surrounding the break; a washer disposed outside the sealing gasket; and a clamping arrangement mechanically coupling the washer and the anchor stud for clamping the gasket onto the protective lining throughout a path surrounding the break. In preferred embodiments, the insulating stud is a threaded cylindrical stud anchored into the wall by threading into a correspondingly threaded aperture, the sealing gasket is a corrosion-resistant, insulating plastic material such as a fluorocarbon, the washer is concave with respect to the gasket and filled with insulating cement, and the clamping arrangement is either a nut threadedly engaged to the insulating stud or a nut in combination with a second stud attached to the first. Reactor vessels using such repair plugs can utilize dip tubes of dissimilar metal without premature deterioration.
Inventors
- 👤 Seymour Schlosberg
- 👤 Michael J. Lerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:40
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/0053; B01J19/0073; B01J19/02; B23; B23P; B23P6/00; B23P6/04; B01J2219/00; B01J2219/02; B01J2219/0204; B01J2219/0209; B01J2219/0245; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49718; Y10T29/49732; Y10T29/49734; Y10T29/49735; Y10T29/49739; Y10T29/49741
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
151 words
In combination: a protectively lined reactor vessel for containing conductive liquid of the type comprising a conductive metal support wall and an insulating protective inner liner having at least one break therein; a repair plug disposed in the wall of said vessel, said repair plug comprising a first metal exposed to said conductive fluid and comprising, (a) an insulating anchor stud anchored into the portion of said metal support wall underlying said break, (b) a sealing gasket disposed on the portion of said protective lining surrounding said break and clamped onto said protective lining throughout a path surrounding said break, (c) a washer disposed upon said sealing gasket, and (d) clamping means mechanically coupling said washer and said anchor stud for applying pressure to clamp said gasket onto said protective lining; and an object disposed in said conductive liquid and comprised of a second metal galvanically dissimilar to said first metal.
Claim 2
Dependent Claim
151 words
In combination: a protectively lined reactor vessel for containing conductive liquid of the type comprising a conductive metal support wall and an insulating protective inner liner having at least one break therein; a repair plug disposed in the wall of said vessel, said repair plug comprising a first metal exposed to said conductive fluid and comprising, (a) an insulating anchor stud anchored into the portion of said metal support wall underlying said break, (b) a sealing gasket disposed on the portion of said protective lining surrounding said break and clamped onto said protective lining throughout a path surrounding said break, (c) a washer disposed upon said sealing gasket, and (d) clamping means mechanically coupling said washer and said anchor stud for applying pressure to clamp said gasket onto said protective lining; and an object disposed in said conductive liquid and comprised of a second metal galvanically dissimilar to said first metal.
Claim 3
Dependent Claim
23 words
The combination according to claim 1 wherein the said insulating anchor stud of said repair plug is a threaded, cylindrical insulating anchor stud.
Claim 4
Dependent Claim
21 words
The combination according to claim 1 wherein the sealing gasket of said repair plug is a corrosion resistant, insulating plastic material.
Claim 5
Dependent Claim
17 words
The combination according to claim 1 wherein the sealing gasket of said repair plug is a fluorocarbon.
Claim 6
Dependent Claim
20 words
The combination according to claim 1 wherein the washer of said repair plug is concave with respect to said gasket.
Claim 7
Dependent Claim
31 words
The combination according to claim 5 wherein insulating cement is disposed in the open space between said concave washer and said gasket and between said gasket and said metal support wall.
Claim 8
Dependent Claim
44 words
The combination according to claim 1 wherein: the insulating anchor stud of said repair plug includes a threaded cylindrical portion, and the means in said repair plug mechanically coupling said washer and said anchor stud comprises a nut threadedly engaged to said anchor stud.
Claim 9
Dependent Claim
21 words
The combination according to claim 1 wherein said repair plug includes a second gasket disposed between said washer and said nut.
Claim 10
Dependent Claim
63 words
The combination according to claim 1 wherein: the insulating anchor stud of said repair plug is a ceramic stud containing an interior threaded cylindrical aperture for receiving a second stud; and the means mechanically coupling said washer and said anchor stud comprises a second stud disposed in said interior aperture and extending through said gasket and a nut engaged to said anchor stud.
Claim 11
Dependent Claim
19 words
The combination according to claim 1 wherein said insulating stud has a metal core and a nonconducting outer shell.
Claim 12
Dependent Claim
18 words
The combination according to claim 1 wherein the object comprised of a second metal is a dip tube.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |