US4224736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for sealing electrochemical cells
Assignee: ESB Inc
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Filing: 1978-08-07
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Granted: 1980-09-30
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Expires: 1998-08-07
Abstract
Abstract A process for improving leakage resistant in a galvanic cell is provided. This is done by making an improved grommet and metal cover. The process comprises swelling a grommet which has been placed tightly around the periphery of a metal cover until the grommet is loose upon the metal cover, forcing a sealant solution between the swollen grommet and metal cover and then shrinking the grommet to substantially its original size to trap the sealant compound between the grommet and metal cover.
Inventors
- 👤 Ralph H. Feldhake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:46
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/10; H01M50/147; H01M50/166; H01M50/169; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/4911; Y10T29/49114; Y10T29/49826; Y10T29/49863
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
107 words
A process for manufacturing an improved grommet and metal cover for use in a galvanic cell, the process comprising: (a) swelling the grommet which is comprised of a polyolefin or a nylon and which has been placed tightly around the periphery of the metal cover until the grommet is loose upon the metal cover, (b) forcing a sealant solution between the swollen grommet and metal cover, the sealant solution comprising solvent and sealant material of rosin, polystyrene, polyolefin ethylene vinyl acetate, polyamine, bitumin or thermoplastic elastomer and, (c) shrinking the grommet to substantially its original size to trap the sealant material between the grommet and metal cover.
Claim 2
Dependent Claim
107 words
A process for manufacturing an improved grommet and metal cover for use in a galvanic cell, the process comprising: (a) swelling the grommet which is comprised of a polyolefin or a nylon and which has been placed tightly around the periphery of the metal cover until the grommet is loose upon the metal cover, (b) forcing a sealant solution between the swollen grommet and metal cover, the sealant solution comprising solvent and sealant material of rosin, polystyrene, polyolefin ethylene vinyl acetate, polyamine, bitumin or thermoplastic elastomer and, (c) shrinking the grommet to substantially its original size to trap the sealant material between the grommet and metal cover.
Claim 3
Dependent Claim
17 words
The process of claim 1 wherein the grommet is made from a material which is a polyolefin.
Claim 4
Dependent Claim
26 words
The process of claim 1 wherein the grommet is a nylon, wherein the nylon is 6, 6 nylon; 6, 12 nylon, 6 nylon or 11 nylon.
Claim 5
Dependent Claim
21 words
The process of claim 1 wherein the grommet has been placed around the periphery of the metal cover by injection molding.
Claim 6
Dependent Claim
19 words
The process of claim 1 wherein a liquid swells the grommet and the liquid is methylene chloride or perchloroethylene.
Claim 7
Dependent Claim
37 words
The process of claim 1 wherein the swelling is by placing the grommet and covers into methylene chloride and subjecting the grommet and covers to a temperature of 39°-250° C. for time sufficient to swell the grommet.
Claim 8
Dependent Claim
19 words
The process of claim 6 wherein the time is 0.5 to 3 hours and the temperature is 90°-110° C.
Claim 9
Dependent Claim
14 words
The process of claim 1 wherein the sealant of the sealant solution is bitumen.
Claim 10
Dependent Claim
69 words
The process of claim 8 wherein the bitumen has (a) a softening point, measured by ASTM P36-26 of 180° to 185° F., (b) a penetration measured by ASTM D5-52 at 77° F. of 15 to 20, (c) a specific gravity at 60° F. of 1.00 +, and (d) a viscosity, at 350° F. of 65 seconds, at 375° F. of 39 seconds, and at 400° F. of 29 seconds.
Claim 11
Dependent Claim
22 words
The process of claim 9 wherein the sealant solution is 35 to 45% by weight bitumen, and the solvent is methylene chloride.
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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) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |