Cover With A Labyrinth

Abstract

A cover comprises a lower cover attached to a housing containing a liquid in a plurality of cells and an upper cover matable with the lower cover to form a labyrinth between the lower cover and the upper cover and a plurality of cover sides. The labyrinth has a plurality of cell openings each communicating with one of the cells of the housing, a plurality of mixing areas, and a plurality of labyrinth cell passageways each extending from one of the cell openings to one of the mixing areas. A portion of each of the labyrinth cell passageways extends above a liquid level of the liquid when tipped ninety degrees in all directions onto the cover sides from an upright orientation.

What is claimed is: 
     
         1 . A cover, comprising:
 a lower cover attached to a housing containing a liquid in a plurality of cells; and   an upper cover matable with the lower cover to form a labyrinth between the lower cover and the upper cover and a plurality of cover sides, the labyrinth having a plurality of cell openings each communicating with one of the cells of the housing, a plurality of mixing areas, and a plurality of labyrinth cell passageways each extending from one of the cell openings to one of the mixing areas, a portion of each of the labyrinth cell passageways extending above a liquid level of the liquid when tipped ninety degrees in all directions onto the cover sides from an upright orientation.   
     
     
         2 . The cover of  claim 1 , wherein each of the plurality of labyrinth cell passageways corresponds to one of the plurality of cell openings. 
     
     
         3 . The cover of  claim 1 , wherein each labyrinth cell passageway first communicates with another labyrinth cell passageway in one of the plurality of mixing areas. 
     
     
         4 . The cover of clam  3 , wherein the plurality of cell openings are positioned centrally in the cover between a terminal side and an opposite side of the cover. 
     
     
         5 . The cover of  claim 4 , further comprising a pair of terminals positioned on the terminal side. 
     
     
         6 . The cover of  claim 4 , wherein the plurality of labyrinth cell passageways first extend toward the opposite side before leading to the terminal side. 
     
     
         7 . The cover of  claim 5 , wherein the plurality of mixing areas are positioned on the terminal side. 
     
     
         8 . The cover of  claim 1 , wherein the plurality of mixing areas communicate with a plurality of exhaust areas of the labyrinth. 
     
     
         9 . The cover of  claim 8 , wherein each of the plurality of exhaust areas contains an exterior vent communicating with an area exterior of the cover. 
     
     
         10 . The cover of  claim 7 , wherein the labyrinth has a plurality of exhaust passageways extending along an entirety of the opposite side of the upper cover. 
     
     
         11 . The cover of  claim 10 , wherein the labyrinth has a channel disposed between the plurality of mixing areas and the plurality of exhaust passageways. 
     
     
         12 . The cover of  claim 11 , wherein the channel connects the plurality of mixing areas to the plurality of exhaust passageways by extending from a lower end of each of the plurality of mixing areas at the terminal side and splitting into the plurality of exhaust passageways. 
     
     
         13 . The cover of  claim 12 , wherein the plurality of labyrinth cell passageways each extend to a position directly adjacent one of the plurality of exhaust passageways at the opposite side before leading to the one of the plurality of mixing areas at the terminal side. 
     
     
         14 . The cover of  claim 13 , wherein the labyrinth is defined by a plurality of walls formed by the lower cover and the upper cover. 
     
     
         15 . The cover of  claim 14 , wherein each of the plurality of labyrinth cell passageways is separated only by one of the plurality of walls from one of the plurality of exhaust passageways at the position directly adjacent one of the plurality of exhaust passageways. 
     
     
         16 . The cover of  claim 1 , wherein a plurality of lower labyrinth passageways are a portion of the labyrinth disposed in the lower cover, each of the lower labyrinth passageways has a slope with a lower end of the slope positioned at one of the plurality of cell openings. 
     
     
         17 . The cover of  claim 1 , wherein a plurality of upper labyrinth cell passageways are a portion of the plurality of labyrinth cell passageways disposed in the upper cover, each of the upper labyrinth cell passageways has an upper labyrinth passageway barrier at which the upper labyrinth cell passageway has a reduced cross-sectional area. 
     
     
         18 . The cover of  claim 1 , wherein each of the plurality of labyrinth cell passageways has at least eight ninety degree turns between one of the plurality of cell openings and one of the plurality of mixing areas. 
     
     
         19 . A cover, comprising:
 a lower cover, and   an upper cover matable with the lower cover to form a labyrinth and a plurality of cover sides including a terminal side and an opposite side, the labyrinth defined by a plurality of walls formed by the lower cover and the upper cover and having a plurality of labyrinth cell passageways each extending only between one of a plurality of cell openings and one of a plurality of mixing areas positioned on the terminal side and a plurality of exhaust passageways extending along the opposite side of the upper cover, the plurality of labyrinth cell passageways each extending to a position directly adjacent one of the plurality of exhaust passageways at the opposite side before leading to the one of the plurality of mixing areas at the terminal side.   
     
     
         20 . The cover of  claim 19 , wherein each of the plurality of labyrinth cell passageways is separated only by one of the plurality of walls from one of the plurality of exhaust passageways at the position directly adjacent one of the plurality of exhaust passageways.