Vent valve for acid batteries

Details Vent valve for acid batteries Vent valve for acid batteries

2011-05-31

2011-05-31

Ridley, Basia (Department: 1725)

Chemistry: electrical current producing apparatus, product, and

Having specified venting, feeding or circulation structure

Venting structure

C429S072000, C429S082000, C429S300000

Reexamination Certificate

active

07951475

ABSTRACT:
The present invention concerns a vent valve for acid batteries comprising a substantially cylindrical plug portion (28) which is designed for being brought into engagement with a cell opening of the acid battery (1) and which has at least one passage opening communicating the cell interior of the acid battery with the ambient atmosphere, wherein provided in the passage opening is a valve arrangement (29) having an inlet communicating with the cell interior and an outlet connected to the ambient atmosphere. In order to provide a vent valve for an acid battery, in particular an acid battery with fixed electrolyte, which is simple and inexpensive to produce and which affords improved protection against the escape of battery acid, it is proposed in accordance with the invention that at least one turbulence chamber (30) follows the passage opening of the plug portion (28) in the direction of the cell interior and a gas-permeable filter unit (31, 31′) follows the turbulence chamber (30).

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