US3708343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Primary cell case
Assignee: Spectrum Brands Inc
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Filing: 1971-01-18
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Granted: 1973-01-02
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Expires: 1991-01-18
Abstract
Abstract A primary cell of the button type having a case comprising a bottom can including a top open end, a top cap having a descending flange and a skirt at the end thereof and an annular grommet. The skirt portion of the top cap is adhered to the grommet with an adhesive, such as an epoxy resin, and the open end of the bottom cap is swaged against the grommet to complete the seal. An auxiliary cap having downwardly extending end portions is mounted over the top cap.
Inventors
- 👤 G Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:48
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/10; H01M50/102; H01M50/109; H01M50/147; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
25 words
An energy cell in accordance with claim 1 wherein: the adhesive joining the skirt portion to the shoulder of the grommet is an epoxy resin.
Claim 2
Dependent Claim
92 words
An energy cell in accordance with claim 1 wherein: the cap includes a central protruding portion, an intermediate shoulder portion and a peripheral downwardly extending skirt, said protruding portion being designed to extend through the aperture in the auxiliary top for contact purposes, and, the means separating the anode material from the cathode material comprises a first plurality of separators plates positioned within grommet opening and a second plurality of separators positioned within the can and separating the base of the grommet and the first plurality of separators from the cathode material.
Claim 3
Dependent Claim
34 words
An energy cell in accordance with claim 1 wherein: the anode material comprises a zinc amalgam having a alkaline electrolyte added thereto and, the cathode material comprises a mixture of mercuric oxide and graphite.
Claim 4
Independent Claim
158 words
The method of sealing an energy cell, the cell comprising a case containing active anode and cathode materials, said case comprising a can-like member having a bottom and a cylindrical side wall, and a top opening, a cap having a skirt portion which is positioned within the opening, a flexible sealing annular grommet, said method comprising the steps of: a. adhering the skirt of the cap to the grommet, b. testing the adhesion of the skirt to the grommet for leakproofness, c. assembling the active material within the cap and the can-like member, d. positioning the grommet within the opening of the can-like member and separator means between the active material in the cap and the can-like member, e. swaging the freE wall of the can-like member over the grommet to place the grommet under compression, and f. bonding an auxiliary top cap over the cap and upper portion of the can-like member to provide an additional seal.
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |