Patent ID: 6746795
Filing Date: 2004-06-08
Classification: H01M,Y02E

Abstract:
A battery cap for insertion into a fill port of a cell of a lead-acid electrical storage battery comprising:a hollow, tubular body having upper and lower ends and formed with an upright, tubular annular wall with external radial projection for engaging said fill port, an inwardly projecting rib extending radially inwardly from said wall at said upper end of said tubular body, and said upper end of said tubular body defines an expansive mouth opening, an annular, transverse floor extending radially inwardly from said wall at said lower end of said body and including a central, annular convex downwardly projecting portion that defines a central fluid passage opening therein, and said tubular wall defines a radially inwardly projecting flame arrester seat spaced from both said upper and lower ends of said body, and a pair of laterally spaced gas escape ports are defined in said tubular wall between said flame arrester seat and said mouth opening, a diverter located within said tubular body and formed with a transverse partition extending across the entire area encompassed within said tubular wall and having an undersurface, and peripheral fluid passageways are defined through said transverse partition, and a plurality of legs each formed with an arcuate cross section extending downwardly from said transverse partition perpendicular to said undersurface thereof, and said legs define radial fluid passage gaps therebetween, and said legs rest upon said floor of said tubular body, whereby said legs straddle said central fluid passage opening in said floor, a flat, disc shaped flame arrester extending across the interior of said tubular body and contacting said tubular wall throughout its circumference, and a top end closure with a groove about its periphery, whereby said peripheral groove of said top end closure is engaged with said inwardly projecting rib at said tap end of said tubular body in a snap fit engagement therewith.