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US 5,173,375 AGranted
Electrochemical cell with improved fill port
AssigneeMedtronic, Inc.
InventorsJohn W. Cretzmeyer, John C. Strohkirch
Life of this patent
Estimating the term…
Abstract
One-piece electrochemical cell cover with improved seal area in the fill port. The fill port comprises a countersunk area and an integral boss formed directly underneath the countersunk area.
Claims8
An electrochemical cell having a countersunk fill port and seal comprising:
- a metal container portion having an exterior surface and an interior surface;
- a countersunk area formed in the exterior surface;
- an integral boss formed on the interior surface directly underneath the countersunk area;
- a passage extending from the countersunk area through the boss, the passage of lesser diameter than the countersunk area;
- a plug sealing the passage;
- and
- a closure button in the countersunk area in sealing engagement with the countersunk area.
4 more elements
An electrochemical cell comprising:
- a container and a metal cover closing the container, the cover having a top surface and a bottom surface;
- a countersunk area formed in the top surface;
- an integral boss formed on the bottom surface directly underneath the countersunk area, and a passage extending through the cover from the countersunk area through the boss, said passage of lesser diameter than the countersunk area;
- a plug sealing the bottom portion of the passage;
- a gas absorbing material in the passage over the plug;
- and
- a closure button in the countersunk area sealing the passage over the gas absorbing material.
4 more elements
Dependencies are inferred from the claim text.