BOUCHON A SOUPAPE POUR ACCUMULATEUR ELECTRIQUE

摘要

The cell cap has an annular seat (23) for the escape valve and a membrane (5) fixed by its peripheral edge and pushed against the valve seat by a piston (10) that is displaced by a spring (12). The other end of the spring presses against the bottom (8) of a chamber (20) formed in the cap and containing the piston and the spring. A vent (19) puts the chamber in communication with the atmosphere. A central hole (26) in the piston and the membrane permits escape of gas to atmosphere when the valve opens.