US3923548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastic gas valve for galvanic cells
Assignee: VARTA Batterie AG
•
Filing: 1973-05-18
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Granted: 1975-12-02
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Expires: 1993-05-18
Abstract
Abstract A gas valve, in a galvanic cell having a cover and a current conductor extending through the cover, includes a sealing disc located at the cell cover and surrounding the current conductor, the sealing disc having an inner rim gas-tightly engaging the current conductor, at least one part of the inner rim engaging a smooth surface portion of the current conductor and being elastically yieldable under the action of an increased gas pressure within the cell so as to vent the gas.
Inventors
- 👤 Glaister Steward Bell
- 👤 Jakob Bauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:02
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/30; H01M50/317; H01M50/325; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
162 words
IN A GALVANIC CELL HAVING A COVER AND A CURRENT CONDUCTOR EXTENDING THROUGH THE COVER, SAID COVER INCLUDING A GAS VALVE, SAID COVER AND SAID GAS VALVE BEING FABRICATED AS A SINGLE PIECE WITH THE GAS VALVE AN INTEGRAL PART OF THE COVER COMPRISING A SEALING DISC LOCATED AT THE CELL COVER AND SURROUNDING THE CURRENT CONDUCTOR WITH ONLY A PORTION OF THE INNER PERIPHERAL SURFACE OF SAID SEALING DISC SURROUNDING SAID CURRENT CONDUCTOR IN CONTACT WITH THE SURFACE OF SAID CONDUCTOR, SAID SEALING DISC HAVING AN INNER RIM GAS-TIGHTLY IN CONTACT WITH A SMOOTH VERTICAL SURFACE PORTION OF THE CURRENT CONDUCTOR, SAID INNER RIM CONSTITUTING ONLY A PORTION OF THE INNER PERIPHERAL SURFACE OF SAID SEALING DISC SURROUNDING SAID CURRENT CONDUCTOR, AT LEAST ONE PART OF SAID INNER RIM IN CONTACT WITH SAID SMOOTH SURFACE PORTION OF THE CURRENT CONDUCTOR BEING ELASTICALLY YIELDABLE UNDER THE ACTION OF A GIVEN INCREASED GAS PRESSURE WITHIN THE CELL SO AS TO VENT THE GAS.
Claim 2
Dependent Claim
162 words
IN A GALVANIC CELL HAVING A COVER AND A CURRENT CONDUCTOR EXTENDING THROUGH THE COVER, SAID COVER INCLUDING A GAS VALVE, SAID COVER AND SAID GAS VALVE BEING FABRICATED AS A SINGLE PIECE WITH THE GAS VALVE AN INTEGRAL PART OF THE COVER COMPRISING A SEALING DISC LOCATED AT THE CELL COVER AND SURROUNDING THE CURRENT CONDUCTOR WITH ONLY A PORTION OF THE INNER PERIPHERAL SURFACE OF SAID SEALING DISC SURROUNDING SAID CURRENT CONDUCTOR IN CONTACT WITH THE SURFACE OF SAID CONDUCTOR, SAID SEALING DISC HAVING AN INNER RIM GAS-TIGHTLY IN CONTACT WITH A SMOOTH VERTICAL SURFACE PORTION OF THE CURRENT CONDUCTOR, SAID INNER RIM CONSTITUTING ONLY A PORTION OF THE INNER PERIPHERAL SURFACE OF SAID SEALING DISC SURROUNDING SAID CURRENT CONDUCTOR, AT LEAST ONE PART OF SAID INNER RIM IN CONTACT WITH SAID SMOOTH SURFACE PORTION OF THE CURRENT CONDUCTOR BEING ELASTICALLY YIELDABLE UNDER THE ACTION OF A GIVEN INCREASED GAS PRESSURE WITHIN THE CELL SO AS TO VENT THE GAS.
Claim 3
Dependent Claim
24 words
A gas valve according to claim 1, wherein the current conductor is a carbon rod having said smooth surface portion in the sealing area.
Claim 4
Dependent Claim
17 words
A gas valve according to claim 1, wherein the galvanic cell is a magnesium-manganese dioxide primary cell.
Claim 5
Dependent Claim
46 words
A gas valve according to claim 1, wherein said sealing disc is in the form of an annulus and provided with a longitudinal groove in the inner peripheral surface open to the cell below and closed by said elastically yieldable part of the inner rim above.
Claim 6
Dependent Claim
73 words
A gas valve according to claim 4, wherein said sealing disc is formed additionally with a collar having an inner peripheral surface portion coextensive with said aforementioned inner peripheral surface and in contact with the current conductor, said groove being also formed in said inner peripheral surface portion of said collar and extending from the lower surface of the disc to the elastically yieldable part of the upper free surface of said collar.
Claim 7
Dependent Claim
53 words
A gas valve according to claim 1, wherein the current conductor has a terminal cap at one end thereof, and wherein the current conductor is a carbon rod formed with a longitudinal groove on the outer surface thereof said groove terminating in the region of the elastically yieldable part of the sealing disc.
Claim 8
Dependent Claim
53 words
A gas valve according to claim 6, wherein said sealing disc comprises a ring-shaped disc-like portion and a collar portion coaxially connected to said disc-like portion, said collar and disc-like portions having a coextensive inner peripheral surface in contact with said carbon rod, said groove terminating in the region covered by said collar.
Claim 9
Dependent Claim
27 words
A gas valve according to claim 1, wherein said sealing disc, at least at said one part of said inner rim thereof, is formed of a polyolefine.
Claim 10
Dependent Claim
12 words
A gas valve according to claim 8, wherein said polyolefine is polypropylene.
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |