Gas generating apparatus
AssigneesCity Technology Limited, Advanced Calibration Designs, Inc.
InventorsDavid A. Rohrbacker, John R. Finbow
Life of this patent
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Abstract
Gas generating apparatus comprises an electrochemical cell having gas generating (2) and counter electrodes (3) with an intervening body of electrolyte (9). Current passing between the electrodes causes the generation of gas at the gas generating electrode. A first membrane (24) permeable to gas but substantially impermeable to the electrolyte is positioned sufficiently close to the gas generating electrode (2) that gas generated by the gas generating electrode diffuses through the electrolyte and out through the membrane under the influence of a gas concentration gradient, substantially without forming bubbles in the electrolyte and irrespective of the orientation of the apparatus.
Claims9
Gas generating apparatus comprising an electrochemical cell having gas generating and counter electrodes with an intervening body of electrolyte, whereby current passing between said electrodes causes the generation of gas at said gas generating electrode, the apparatus further comprising a first membrane permeable to gas but substantially impermeable to said electrolyte positioned sufficiently close to said gas generating electrode that gas generated by said gas generating electrode diffuses through said electrolyte and out through said membrane under the influence of a gas concentration gradient, substantially without forming bubbles in the electrolyte and irrespective of the orientation of the apparatus, and wherein said electrochemical cell defines a generally U-shaped electrolyte chamber having a pair of arms connected to a base, said counter electrode extending into one of said arms of the U and the gas generating electrode being positioned at said base of the U.
A calibrating gas generating system comprising gas generating apparatus an electrochemical cell having gas generating and counter electrodes with an intervening body of electrolyte, whereby current passing between said electrodes causes the generation of gas at said gas generating electrode, the apparatus further comprising a first membrane permeable to gas but substantially impermeable to said electrolyte positioned sufficiently close to said gas generating electrode that gas generated by said gas generating electrode diffuses through said electrolyte and out through said membrane under the influence of a gas concentration gradient, substantially without forming bubbles in the electrolyte and irrespective of the orientation of the apparatus, and wherein said electrochemical cell defines a generally U-shaped electrolyte chamber having a pair of arms connected to a base, said counter electrode extending into one of said arms of the U and the gas generating electrode being positioned at said base of the U;
- and a purge gas chamber into which gas transmitted through said first membrane passes, and in which the gas is mixed with a purge gas.
Dependencies are inferred from the claim text.