US3852117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for electrochemical cells and the like
Assignee: Wyeth Holdings LLC
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Filing: 1970-05-18
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Granted: 1974-12-03
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Expires: 1990-05-18
Abstract
Abstract A seal is provided between the cylinder wall and closure disc at one end of the cylindrical container for an electrochemical cell or the like. The seal comprises opposed circular sealing members formed by deformation of the cylinder wall, bearing against opposite faces of the disc around its rim. The seal is closed by axial compression of the cylinder wall causing deformation of the wall to form the sealing members and to press such members against the closure disc. Several variations are described of cell closures embodying the invention.
Inventors
- 👤 A Fraioli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:35
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/10; H01M50/147; H01M50/166; H01M50/171; H01M50/167; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
222 words
A method of sealing a cylindrical battery case which comprises a metal wall which is a hollow cylinder, said method comprising the steps of a. forming two spaced apart circumferential indentations spaced apart longitudinally in said metal cylinder wall, each of said indentations comprising a longer section and a shorter section of said cylinder wall inclined inwardly from regular sections of said cylinder wall adjacent said indentation and joined at a concentric circle inside said cylinder, the said shorter member of each of said indentations extending inward from an intermediate regular section of said cylinder wall separating said indentations; b. positioning a circular closure plate concentrically inside said cylinder between said two indentations and c. deforming said indentations by compressive force transmitted through said cylinder wall to deform said circumferential indentations and forming thereby two inwardly extending members of said cylinder wall, each of such members approximating the shape of a frustrum of a hollow right angle cone joined at the larger base of said frustrum to a regular section of said cylinder wall and extending inwardly to the smaller base of said frustrum which provides a circular sealing edge inside said cylinder bearing against one face of said closure plate, the respective said sealing edges of said two members each bearing against one of the opposed faces of said closure plate.
Claim 2
Independent Claim
222 words
A method of sealing a cylindrical battery case which comprises a metal wall which is a hollow cylinder, said method comprising the steps of a. forming two spaced apart circumferential indentations spaced apart longitudinally in said metal cylinder wall, each of said indentations comprising a longer section and a shorter section of said cylinder wall inclined inwardly from regular sections of said cylinder wall adjacent said indentation and joined at a concentric circle inside said cylinder, the said shorter member of each of said indentations extending inward from an intermediate regular section of said cylinder wall separating said indentations; b. positioning a circular closure plate concentrically inside said cylinder between said two indentations and c. deforming said indentations by compressive force transmitted through said cylinder wall to deform said circumferential indentations and forming thereby two inwardly extending members of said cylinder wall, each of such members approximating the shape of a frustrum of a hollow right angle cone joined at the larger base of said frustrum to a regular section of said cylinder wall and extending inwardly to the smaller base of said frustrum which provides a circular sealing edge inside said cylinder bearing against one face of said closure plate, the respective said sealing edges of said two members each bearing against one of the opposed faces of said closure plate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |