Leak resistant battery cover
AssigneeDouglas Battery Manufacturing Company
InventorsRobert W. Fritts, David M. Revak
Life of this patent
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Abstract
The present invention is directed to a leak resistant battery cover for storage batteries. The battery cover provides a labyrinth of passages which provide a path from each cell vent to the atmospheric vent. The labyrinth is configured to provide a portion of each path above a level in which the electrolyte in the respective cells attains when the battery is tipped on any one of its sides or rotated ninety (90) degrees from an upright position. The labyrinth configuration prevents electrolyte from reaching the atmospheric vent and spilling out of the battery.
Claims25
A leak resistant battery cover for a lead acid battery of the type including a housing having at least one cell, said cover comprising:
- a) a cover having a top cover member and a bottom cover member forming an enclosed area therebetween;
- b) an aperture in and extending through said bottom cover member into a cell of the housing, said aperture adapted to communicate gases within the cell to said enclosed area of said cover;
- c) an atmospheric vent in said cover adapted to communicate gases from within said enclosed area of said cover to atmosphere;
- d) a labyrinth of passages formed by a convoluted arrangement of vertical walls extending between said bottom cover member and top cover member within said enclosed area, said labyrinth forming a first convoluted path between said aperture and said atmospheric vent;
- and
- e) said labyrinth being so arranged that at least one portion of the first convoluted path thereof is at a level above the electrolyte level in said cell when the battery is rotated as much as ninety degrees from an upright position, no matter whether said battery is rotated forwardly, rearwardly, or to either side.
Dependencies are inferred from the claim text.