US4484691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure release device
Assignee: Duracell Inc USA
•
Filing: 1979-05-21
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Granted: 1984-11-27
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Expires: 1999-05-21
Abstract
Abstract Pressure release means for pressurized containers and particularly electrochemical cell containers subject to pressure eruption conditions in which the pressure release means is an integral part of the container wall. This means is actuated at predetermined abnormal pressure at which a relatively rigid and undeformed wall area between two deformed portions of the container wall tears to form a vent. This vent can be adapted to provide either slow or rapid pressure release.
Inventors
- 👤 Wayne L. Lees
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:57
CPC Classifications
F; F16; F16K; F16K17/00; F16K17/02; F16K17/14; H; H01; H01G; H01G9/00; H01G9/004; H01G9/08; H01G9/12; H01M; H01M50/00; H01M50/30; H01M50/342; H01M50/3425; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1692; Y10T137/1714; Y10T137/1744
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A container having a pressure release device in a wall thereof, said wall being deformed whereby to form channel means for permitting a portion of said wall to move outwardly, and a small relatively undeformed section of said wall being positioned between adjacent portions of said channel means, said relatively undeformed section including a groove therein with said groove extending across said section to connect adjacent portions of said channel means and wherein the inner width configuration of said groove is lenticular.
Claim 2
Dependent Claim
82 words
A container having a pressure release device in a wall thereof, said wall being deformed whereby to form channel means for permitting a portion of said wall to move outwardly, and a small relatively undeformed section of said wall being positioned between adjacent portions of said channel means, said relatively undeformed section including a groove therein with said groove extending across said section to connect adjacent portions of said channel means and wherein the inner width configuration of said groove is lenticular.
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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) | 1987-11-27 | 1988-05-28 | 1988-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-27 | 1992-05-28 | 1992-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-27 | 1996-05-28 | 1996-11-27 | $7700.00 | Window Closed / Lapsed |