Patent US1640788A successfully refreshed from Google Patents.
US4052533A
Expired / Lapsed
US
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Pressure relief flapper vent valve for galvanic cells
Assignee: Edgewell Personal Care Brands LLC
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Filing: 1976-03-29
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Granted: 1977-10-04
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Expires: 1996-03-29
Abstract
Abstract A galvanic dry cell having a resealable subseal comprising a cup-shaped flapper vent valve having an opening at its center for receiving and contacting the cell's current collector rod and a peripheral edge segment contacting and conforming to the inner wall of the cell's container and adapted for deflecting upwardly thereby providing a resealable vent path at the valve-container interface.
Inventors
- 👤 Henry Heinz, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:00
CPC Classifications
H; H01; H01M; H01M50/00; H01M50/30; H01M50/317; H01M50/325; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
145 words
A galvanic cell comprising a container having an open end and an inner disposed anode; a depolarizer-cathode within said container; a porous separator disposed between said anode and said cathode; an electrolyte wetting said depolarizer-cathode; a current collector rod embedded within and projected above said depolarizer-cathode; and a resealable flapper vent valve disposed concentrically about the current collector rod over the depolarizer-cathode and contacting the inner wall of the container so as to provide a vent at the valve-container interface for releasing excessive gas pressure within the container, said resealable flapper vent valve comprising a resilient, deformable cupped annulus having an opening at its center through which the top of the current collector rod passes, contacts and projects above, and having its peripheral edge segment deflected upwardly such that at least the bottom peripheral edge of the annulus contacts the inner wall of the container.
Claim 2
Dependent Claim
145 words
A galvanic cell comprising a container having an open end and an inner disposed anode; a depolarizer-cathode within said container; a porous separator disposed between said anode and said cathode; an electrolyte wetting said depolarizer-cathode; a current collector rod embedded within and projected above said depolarizer-cathode; and a resealable flapper vent valve disposed concentrically about the current collector rod over the depolarizer-cathode and contacting the inner wall of the container so as to provide a vent at the valve-container interface for releasing excessive gas pressure within the container, said resealable flapper vent valve comprising a resilient, deformable cupped annulus having an opening at its center through which the top of the current collector rod passes, contacts and projects above, and having its peripheral edge segment deflected upwardly such that at least the bottom peripheral edge of the annulus contacts the inner wall of the container.
Claim 3
Dependent Claim
25 words
The galvanic cell of claim 1 wherein the container is made of a consumable anode material and thus functions as the anode of the cell.
Claim 4
Dependent Claim
28 words
The galvanic cell of claim 2 wherein a film of grease is disposed along at least a portion of the flapper vent valve and current collector rod interface.
Claim 5
Dependent Claim
26 words
The galvanic cell of claim 2 wherein a film of grease is disposed along at least a portion of the flapper vent valve and container interface.
Claim 6
Dependent Claim
28 words
The galvanic cell of claim 3 wherein a film of grease is disposed along at least a portion of the flapper vent valve and current collector rod interface.
Claim 7
Dependent Claim
28 words
The galvanic cell of claim 2 wherein a film of sealant is disposed at least along a portion of the flapper vent valve and current collector rod interface.
Claim 8
Dependent Claim
26 words
The galvanic cell of claim 2 wherein a film of sealant is disposed at least along a portion of the flapper vent valve and container interface.
Claim 9
Dependent Claim
28 words
The galvanic cell of claim 7 wherein a film of sealant is disposed at least along a portion of the flapper vent valve and current collector rod interface.
Claim 10
Dependent Claim
23 words
The galvanic cell of claim 2 wherein the anode is zinc, the depolarizer-cathode comprises manganese dioxide and the current collector rod is carbon.
Claim 11
Dependent Claim
29 words
The galvanic cell of claim 1 wherein the flapper vent valve is made of a material selected from the group consisting of neoprene, polyurethane, polyvinyl chloride, polyethylene and polypropylene.
Claim 12
Dependent Claim
18 words
The galvanic cell of claim 1 wherein the flapper vent valve is made of a cellular plastic material.
Claim 13
Dependent Claim
20 words
The galvanic cell of claim 1 wherein the flapper vent valve is made of a copolymer of butadiene and styrene.
Claim 14
Dependent Claim
15 words
The galvanic cell of claim 10 wherein the flapper vent valve is made of neoprene.
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) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |