US4207384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric storage batteries
Assignee: Chloride Group Ltd
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Filing: 1979-05-23
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Granted: 1980-06-10
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Expires: 1999-05-23
Abstract
Abstract There is disclosed a sealed lead acid button cell having a moulded acid resistant polymer case formed in two portions each portion having a central boss with a passage leading into the cell, and a metal plug located in the said passage, the inner end of the plug being electrically connected to the electrode located in that portion of the case, and a cap made of a metal harder than the metal of the said plug surrounding the central boss and squeezing it against the plug and the cap being electrically connected to the plug. The cap may thus be crimped around the boss or may be a force fit thereon. The case is provided with a pressure relief vent to allow gases to vent under service conditions.
Inventors
- 👤 Kenneth Peters
- 👤 Barry Culpin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:17
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/30; H01M50/317; H01M50/325; H01M50/333; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/56; H01M10/00; H01M10/06; H01M10/12; H01M10/126; H01M4/64; H01M4/66; H01M4/68; H01M4/685; H01M50/40; H01M50/409; H01M50/44; H01M10/34; H01M10/342; H01M2300/00; H01M2300/0002; H01M2300/0005; H01M50/431; H01M50/434; H01M50/437; H01M50/489; H01M50/491; H01M50/50; H01M50/543; H01M50/552; H01M50/553; H01M50/572; H01M50/584; H01M50/59; H01M6/00; H01M6/42; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
88 words
a sealed lead acid button cell, said cell having a moulded acid resistant polymer case formed in two portions, each said portion having an external surface, containing an electrode and having a central boss defining a passage leading into said cell, a metal plug having an inner end and an outer end being located in said passage, said inner end of said plug being electrically connected to said electrode, and a metal cap surrounding said central boss and being electrically connected to said plug at said outer end.
Claim 2
Dependent Claim
88 words
a sealed lead acid button cell, said cell having a moulded acid resistant polymer case formed in two portions, each said portion having an external surface, containing an electrode and having a central boss defining a passage leading into said cell, a metal plug having an inner end and an outer end being located in said passage, said inner end of said plug being electrically connected to said electrode, and a metal cap surrounding said central boss and being electrically connected to said plug at said outer end.
Claim 3
Dependent Claim
17 words
A cell as claimed in claim 1 wherein said cap is a force fit on said boss.
Claim 4
Dependent Claim
20 words
A cell as claimed in claim 1 in which said electrode is welded to said inner end of said plug.
Claim 5
Dependent Claim
18 words
A cell as claimed in claim 1 wherein said plug is of the same metal as said electrode.
Claim 6
Dependent Claim
30 words
A cell as claimed in claim 1 wherein said cap makes physical contact with said outer end of said plug, said outer end extending over the end of said boss.
Claim 7
Dependent Claim
23 words
A cell as claimed in claim 1 wherein each said external surface defines a recess, said cap being just proud of said surface.
Claim 8
Dependent Claim
80 words
A cell as claimed in claim 1 including a venting arrangement, said venting arrangement comprising a boss recessed below the surface of one of said case portions, said boss defining a hole communicating with the interior of said cell, said case portion defining a slot, said slot containing said boss and cooperating with a spring biased against said hole in said boss, said spring carrying a sealing pad adapted to unseal said hole when the pressure rises in said cell.
Claim 9
Dependent Claim
20 words
A cell as claimed in claim 7 wherein said spring is recessed into said external surface of said case portion.
Claim 10
Dependent Claim
34 words
A cell as claimed in claim 1 in which said external surfaces define recesses adapted to engage clips to enable two or more cells to be clipped together to form a continuous cell pack.
Claim 11
Dependent Claim
43 words
A cell as claimed in claim 1 in which said external surfaces are provided with register means to assist in assembling packs of cells, said register means being such as to ensure that cells can only be assembled in the correct polarity relationships.
Claim 12
Dependent Claim
19 words
A cell as claimed in claim 1 in which said electrodes have expanded metal supports for the active material.
Claim 13
Dependent Claim
27 words
A cell as claimed in claim 1 in which the electrodes of opposite polarity are separated from each other by a dense sheet of acid resistant fibres.
Claim 14
Dependent Claim
36 words
A cell as claimed in claim 1 in which each said electrode is separated from the inside of a respective case portion of said cell by a ring of a dense sheet of acid resistant fibres.
Claim 15
Dependent Claim
29 words
A cell as claimed in claim 12 or claim 13 in which said dense sheet of acid resistant fibres comprises short staple glass fibres, of micron or sub-micron diameter.
Claim 16
Dependent Claim
40 words
A cell as claimed in claim 1 in which one of the said portions of the case is one colour and the other of said portions of the case is another colour to assist in correct orientation of the cells.
Claim 17
Dependent Claim
14 words
A battery made up of sealed lead acid cells as claimed in claim 1.
Claim 18
Dependent Claim
51 words
A battery as claimed in claim 16 wherein said cells are clipped together by spring clips located in slots formed in each said portion of said case of the cells, two opposed clips being used for each pair of cells and the clips being staggered from pair to pair of cells.
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) | 1983-06-10 | 1983-12-10 | 1984-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-10 | 1987-12-10 | 1988-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-10 | 1991-12-10 | 1992-06-10 | $7700.00 | Window Closed / Lapsed |