Patent ID: 8256415

Claim:
A method of storing/delivering liquid oxygen (LOX) to a user comprising: providing LOX to a stationary canister adapted to contain a first quantity of LOX; maintaining the stationary canister at a fixed location; providing a portable liquid oxygen recharger adapted to contain a second quantity of LOX that is less than the first quantity; providing a portable liquid oxygen delivery apparatus adapted to contain a third quantity of LOX that is less than the second quantity; transferring LOX from the stationary canister to the portable liquid oxygen recharger; delivering oxygen from the portable liquid oxygen delivery apparatus to an airway of a user using LOX stored in the portable liquid oxygen delivery apparatus while the portable LOX delivery apparatus is de-coupled from the portable recharger; coupling the portable recharger to the portable LOX delivery apparatus; and refilling the portable liquid oxygen delivery apparatus by transferring LOX from the portable liquid oxygen recharger to the portable liquid oxygen delivery apparatus with the portable recharger coupled to the portable liquid oxygen delivery apparatus.