Valve cap for an electric storage cell

Details Valve cap for an electric storage cell Valve cap for an electric storage cell

1998-05-01

2000-04-18

Nuzzolillo, Maria

Chemistry: electrical current producing apparatus, product, and

Means externally releasing internal gas pressure from closed...

Elastic, resilient or spring biasing valve means

429 53, 429 57, 429 82, H01M 212

Patent

active

060513322

ABSTRACT:
The valve cap for an electric storage cell includes a central annular valve seat (23) and a membrane (5) fixed by its peripheral edge and urged against the seat by a piston (10) bearing thereagainst by means of a spring (12), the rear end of said spring (12) bearing on the endwall (8) of a chamber (20) formed in the cap and containing the piston (10) and the spring. A vent (19) puts the chamber (20) into communication with the atmosphere. A central orifice (26, 28) through the piston (10) and the membrane (5), enables gas from within the cell to escape via the top vent (19) when the valve opens.

REFERENCES:
patent: 3436273 (1969-04-01), Gratzmuller
patent: 4078121 (1978-03-01), Gratzmuller
patent: 4431716 (1984-02-01), Eppley et al.

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