Title: Porous ceramic battery vent

Abstract: A fired porous ceramic battery vent having a porosity and particle size distribution which can effectively permit the venting of cell gases in the battery while at the same time impede a flame from entering the battery container. The fired ceramic body is formed with a high melting point inorganic material containing aluminum and silicon oxides having a particle size no larger than about 600 microns. A lower melting point glass is used to fuse the particles together when in the fired state. The particle size of the high melting point material is important and ranges in size from 200 to 600 microns.

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Inventors: Hipp, Julius Carl (Elm Grove, WI, US)

Application Number: 420447
Filing Date: 1973-11-30
Publication_date: 1976-03-09
Assignee: Globe-Union Inc. (Milwaukee, WI)
Primary Class(es): 429/82 501/31, 501/54, 501/56, 501/80
Other Classes:
US Patent Ref:

3753746	Aug, 1973	Koerner	106/40.
3784385	Jan, 1974	Nekrasov	106/40.

Other Refs:
Primary Examiner: Douglas, Winston A.
Assistant Examiner: Bell, Mark
Attorney: Kirschnik; James L., Ryan; John Phillip