Patent ID: 8702915

Claim:
An electrochemical gas generator comprising: (a) a container having a chamber within, a top with one or more outlets therein, and a bottom with an upward extending recess and one or more gas inlets on said bottom; (b) a battery within said chamber; (c) an electrochemical cell assembly below, and in communication with, said battery, said electrochemical cell assembly comprising; an electrolytic membrane defining a first outer peripheral edge and a pair of opposing faces, a catalytically active electrode above and below said electrolytic membrane, a conductive and porous current collector above and below each of said electrodes, each said current collector defining an outwardly-facing face and an inwardly-facing face, with each said current collector inwardly-facing face oriented towards one said opposing membrane face, said current collectors each further defining a second outer peripheral edge, and an upper and a lower oxygen-impermeable film, each with an outward extension sealed to one another, and each said film further sealed to one said membrane face as well as one said current collector outwardly-facing face, said upper and lower oxygen-impermeable film above and below and encircling said second peripheral edges and pressing onto each one of said current collectors thereby forming an air-tight seal therearound; d) activation means for activating said electrochemical gas generator; (e) an oxygen-permeable film of a pre-determined oxygen permeability in said recess; and (f) compression means for pressing said oxygen-permeable film into a direct communication with said bottom of said container, said compression means having one or more inlets therein.