66 results about "Portable oxygen concentrator" patented technology

A portable oxygen concentrator includes a pair of sieve beds, a compressor for delivering air to the sieve beds, a reservoir receiving oxygen-enriched gas from the sieve beds, and an air manifold attached to the first ends of the sieve beds. A set of valves operate under the control of a controller for selectively opening and closing the valves to alternately charge and purge the sieve beds to deliver oxygen-enriched gas into the reservoir. In addition, an exhaust passage communicates with the plurality of sieve beds to deliver a flow of nitrogen evacuated from the sieve beds such that the flow of the nitrogen is directed at or across the controller to cool the controller.

System for producing an oxygen-rich gas comprising (a) a primary gas mover including a first and a second compressor, wherein the primary gas mover is characterized by a weight Wp; (b) a drive motor adapted to drive the first and second compressors; (c) a rechargeable power supply characterized by a weight, Wb; and (d) a pressure / vacuum swing adsorption unit adapted to separate the pressurized feed air into an oxygen-rich product at a product flow rate Fp and an oxygen-depleted waste gas, wherein the adsorption unit comprises a plurality of adsorber beds containing an adsorbent and characterized by a total adsorbent weight Wa; and wherein the combined weight, Wt, of the adsorbent, the primary gas mover, and the rechargeable power supply is characterized by the expression0.75 Fp<Wt<2.02 Fpwhere Fp is in liters per min (at 23° C. and 1 atma pressure), and Wa, Wp, and Wb are in pounds.

A portable oxygen concentrator includes a reservoir adapted to store oxygen-enriched gas, a delivery valve adapted to communicate with the reservoir, a pressure sensor adapted to measure a reservoir pressure within the reservoir and to measure a pressure drop across the delivery valve, and an input device adapted to receive a pulse does setting. A controller coupled to the pressure sensor and monitors the reservoir pressure and the pressure drop across the delivery valve. The controller is also coupled to the delivery valve to selectively open the delivery valve for pulse durations based on the pulse dose setting to deliver pulses of gas from the reservoir to a user. The controller further adjusts the pulse durations based at least partially upon the reservoir pressure and the pressure drop across the delivery valve.

A portable pressure swing adsorption apparatus and conservation device for medical use, and a sound enclosure for the apparatus having two isolating sections to enclose the apparatus, the enclosure having an inlet in one of the sections for allowing ambient air into the enclosure and an outlet in the other section for enabling waste gases from the apparatus to exit the enclosure and causing the ambient air and waste gases substantially to change direction within the enclosure before entering or exiting the apparatus.

A compact and highly portable combination pressure swing adsorption apparatus and product gas conservation device for medical use, to produce efficiently a gas with a high concentration of oxygen and to deliver the oxygen concentrated gas to a user at selectable times and in selectable doses, in which the operating components are detachably mounted together as a single unit.

A compressor suitable for use in a portable oxygen concentrator. In one exemplary embodiment, the compressor includes a crankshaft rotatable about a central axis and a plurality of diaphragm assemblies spaced apart around the central axis generally within a plane. The diaphragm assemblies include diaphragms movably mounted to respective housings to at least partially define chambers. A plurality of rods extend between respective diaphragms and the crankshaft. The rods are coupled to the crankshaft such that the rods are offset axially from one another along the central axis and are coupled to the diaphragms for cyclically increasing and decreasing pressure within the chambers as the crankshaft rotates about the central axis.

A portable oxygen concentrator designed for medical use with a novel housing and internal component design that reduces noise and vibration while increasing durability. The improved design of the portable oxygen concentrator further facilitates easy maintenance and repair over the life of the equipment.

A portable oxygen concentrator designed for medical use with a novel housing and internal component design that reduces noise and vibration while increasing durability. The improved design of the portable oxygen concentrator further facilitates easy maintenance and repair over the life of the equipment.

Methods and systems for concentrating oxygen include an oxygen concentration subsystem configured to generate a supply of oxygen-enriched gas, an oxygen delivery subsystem configured to communicate oxygen-enriched gas to a respiratory circuit for delivery to an airway of a subject, and one or more batteries configured to act as a sole power supply for the oxygen concentration subsystem and the oxygen delivery subsystem, wherein a ratio ROW is determined as: ROW=(O2 output) / total weight of the oxygen concentrator system, where O2 output is the maximum continuous oxygen output of the oxygen concentrator system, wherein the ratio Row is greater than about 0.19 lpm / lbs.

An exhaust conduit and adapter apparatus for mounting to a pair of exhaust outlets mounted oppositely on the base of a portable oxygen concentrator includes an opposed facing pair of substantially unshaped hollow conduits wherein each conduit has an inlet end and an outlet end. The inlet ends are separated by a distance equal to a separation distance between the pair of exhaust outlets. The outlet ends are mounted to each other in fluid communication with a junction having a single outlet. The inlet ends are adapted for mounting to the pair of exhaust outlets so that, when so mounted, hot exhaust from the oxygen concentrator flows through each conduit and out through the junction and the single outlet of the junction. An outflow conduit is mountable to the single outlet of the junction for outflow of the hot exhaust from the single outlet to a remote location, remote from a patient using the oxygen concentrator.

A portable oxygen concentrator designed for medical use where the adsorbent beds, are designed to be replaced by a patient. The concentrator is designed so that the power supply and adsorbent bed mount is one module and the compressor and air filter are part of another module configured to provide a unitary cooling and air supply system. Replacement beds may be installed easily by patients, and all gas seals will function properly after installation.

A portable oxygen concentrator designed for medical use where the sieve beds, adsorbers, are designed to be replaced by a patient. The concentrator is designed so that the beds are at least partially exposed to the outside of the system and can be easily released by a simple user-friendly mechanism. Replacement beds may be installed easily by patients, and all gas seals will function properly after installation.

A portable oxygen concentrator designed for medical use where the usable life of the sieve beds, adsorbers, is monitored and communicated to the user or service provider through a user interface or a transmitted signal. The concentrator is designed so that the beds are easily replaced by the user or a field technician. Preferably PSA cycle operating parameters appropriate to the replaced beds can be easily reset if needed by the user or service provider.

A portable oxygen concentrator designed for medical use where the adsorbent beds, are designed to be replaced by a patient. The concentrator is designed so that the power supply and adsorbent bed mount is one module and the compressor and air filter are part of another module configured to provide a unitary cooling and air supply system. Replacement beds may be installed easily by patients, and all gas seals will function properly after installation.

A portable oxygen concentrator includes a pressure swing absorption system defined by a relatively rigid housing adapted to generate a flow of oxygen enriched gas and a battery adapted to provide power to the pressure swing absorption system. The oxygen concentrator has a total weight of less than about 10 lbs, has a maximum flow of 100% O2 equivalent gas of about 0.9 lpm, has a total volume less than about 800 in3, and gas a battery life of at least about 8 hours. The present invention also using a liquefaction or transfill system in combination with such an oxygen concentrator.