Abstract A venting and filling device for a storage battery which comprises a funnel tube extending vertically through an opening in the cover of the battery and being adapted to be moved from a lower position to an upper position; in its lower position the tube defining a venting space within the opening and extending below the level of electrolyte within the battery and in the upper position the tube closing off the venting space and extending to a level substantially equal to the proper operating level of electrolyte in the battery; and an explosion-proof venting means operatively associated with the funnel tube and the battery cover for safely venting explosive gases escaping from the battery through the venting space.
The device of claim 1 in which said explosion-proof venting means comprises a venting chamber having a wall of microporous material which surrounds the upper portion of the funnel tube and which is in communication with said venting space whereby gases escaping through said venting space collect in said chamber and then diffuse through said wall of microporous material to the atmosphere.
Claim 2
Dependent Claim
14 words
The device of claim 1 in which said tube portion is of biconical configuration.
Claim 3
Dependent Claim
32 words
The device of claim 2 in which said wall of microporous material comprises at least two fitted concentric tubular structures joined in telescoping relationship responsive to the movement of said funnel tube.
Claim 4
Dependent Claim
61 words
The device of claim 4 in which said wall of microporous material comprises an outer tubular structure of microporous material, an inner tubular structure of microporous material fitted within said outer structure in sliding relationship therewith, said outer structure being joined to the upper portion of said funnel tube and movable therewith and said lower portion being fixed to said cover.
Claim 5
Dependent Claim
39 words
The device of claim 1 further comprising a sealing device in which the frustroconical portion of said funnel tube has engaging means on its exterior for sealing off said orifice means when said tube is in its upper position.