Portable low profile DC oxygen concentrator
AssigneeThe John Bunn Company
InventorNorman R. McCombs
Life of this patent
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Abstract
A portable PSA device having a combination of features including a demand device to thereby limit the necessary size of the PSA unit itself; an improved spring loaded bed to permit horizontal use, and an arrangement of parts overall to produce a low profile, low center of gravity compact unit particularly suitable for use in automobiles and of sufficiently low power demand to be powered by the cigarette lighter socket of automobiles.
Claims42
A portable PSA machine having a relatively low profile and a relatively low center of gravity such that said machine will be stable against falling over when in use in moving vehicles, said machine including self-contained compressed air supply means, said machine comprising a plurality of beds of molecular sieve material, means to locate said beds in said machine in a horizontal orientation when said machine is in use in a vehicle, said machine comprising cabinet means, means to cool said machine, said cooling means comprising air inlet means and air outlet means positioned in a pair of opposed walls of said cabinet means, said cabinet means being elongated in one direction, said one direction being horizontal when said machine is in its normal use position, said opposed walls comprising those walls of said cabinet means at the ends of said elongated dimension, and the configuration of said machine being such that said machine will tend to be located in the foot well of an automobile with the air flow therethrough via said air inlet means and said outlet means from side to side of said automobile.
A PSA machine comprising at least one bed device to hold molecular sieve material, said machine comprising self-contained compressed air supply means and means to cool said machine, means to mount said at least one bed in said machine in a horizontal orientation, and spring means within said bed adapted to hold sieve material therein immobile and filling the space in said bed device during use of said machine and to take up any shortening of said sieve material which occurs during use of said PSA machine.
A portable PSA oxygen concentrator system, said system comprising an oxygen concentrator, said oxygen concentrator comprising self-contained compressed air supply means, a demand control device, and a patient's cannula or demand mask, said oxygen concentrator being of a relatively low profile and having a relatively low center of gravity such that said oxygen concentrator system is stable against falling over when used in moving vehicles, and said demand control device comprising means to permit the flow of oxygen from said concentrator via said cannula or said demand mask to the patient only in response to the respiration inspirational efforts of the patient.
The system of claim 55, said bed comprising a length of metal tubing, a pair of sealing end plate means positioned one at each of the ends of said tubing, a pair of sieve material retainer means inside said tubing positioned one in predetermined spaced relation to each of said end plate means, both of said end plate means being imperforate but being provided with gas flow fitting means to permit gas flow to, through and away from sieve material inside said tubing, each of said retainer means being so formed as to permit the flow of gas therethrough, and each of said retainer means including means to form a gas tight seal between the outermost portions thereof and the inside surface thereof.
Dependencies are inferred from the claim text.