Patent ID: 7721733

Claim:
A portable liquid oxygen delivery system for an individual comprising: a portable liquid oxygen delivery apparatus having a first interior adapted to contain a first quantity of liquid oxygen, wherein the portable liquid oxygen delivery apparatus is sufficiently lightweight for portability by an ambulatory patient, and wherein the portable liquid oxygen delivery apparatus includes a fill port adapted to receive liquid oxygen into the first interior, and a delivery port adapted to dispense liquid oxygen form the first interior; and a portable liquid oxygen recharger having a second interior adapted to store a second quantity of liquid oxygen that is greater than the first quantity and less than a third quantity contained in a stationary storage canister, wherein the portable liquid oxygen recharger is sufficiently lightweight for portability by an ambulatory patient, and wherein the portable liquid oxygen recharger includes an interface adapted to be coupled to the fill port of the portable liquid oxygen delivery apparatus enabling liquid oxygen to be delivered from the portable liquid oxygen recharger to the portable liquid oxygen delivery apparatus, such that a user is provided with a first quantity of liquid oxygen contained in the portable liquid oxygen delivery apparatus that is replenished from the second quantity of liquid oxygen from the portable liquid oxygen recharger without interfacing with the stationary storage canister.