Abstract: An air pulse generator for providing high frequency chest wall oscillation therapy to a patient is provided. The air pulse generator has a housing and first and second diaphragms supported in the housing. The air pulse generator further has a crankshaft assembly coupled to the first and second diaphragms to reciprocally move the diaphragms back and forth to produce oscillating pressure pulses. The crank shaft assembly includes a motor with an output shaft that rotates about a first axis, a flywheel mounted on the shaft to rotate therewith, a first member coupled to the first diaphragm and pinned to the flywheel by a first stub shaft that is offset from the first axis, a second member coupled to the second diaphragm, and a cam interposed between the first member and the second member. The first member is pinned to the cam by the first stub shaft and the second member is pinned to the cam by a second stub shaft.

Abstract: An air pulse generator includes a housing having a front wall and a back wall defining an interior region and a shell having a front portion and a back portion defining an air chamber. The front wall of the housing has first and second air openings. The front portion of the shell has first and second air ports in communication with the air chamber. The first and second air ports are aligned with the first and second air openings when the shell is mounted within the interior region of the housing.

Abstract: A removable gas separation cartridge which includes a housing containing three columns, each having an inlet port, an outlet port, and a bed of adsorbent material. The cartridge is removable from an oxygen concentrator which separates oxygen from ambient air by using a vacuum swing absorption process.

Abstract: An oxygen separator for separating oxygen from ambient air utilizing a vacuum swing adsorption process has a mass of less than 2.3 kg. A carrier is mountable on a person to support the oxygen separator for ambulatory use.

Abstract: An oxygen concentrator comprises a vacuum swing adsorption (VSA) gas separation system which includes a cartridge containing a mass of adsorbent material for producing oxygen, a drive which activates the gas separation system, and a power source comprising a mass. A ratio of the mass of the power source to a flow rate of oxygen produced by the oxygen concentrator is between 0.047 and 0.29 kg/LPM·hr.

Abstract: An apparatus for high frequency chest wall oscillation (HFCWO) comprises a patient interface which includes an expandable air chamber and an air pulse generator in fluid communication with the patient interface. The air pulse generator includes a variable displacement air chamber and programmable controller which controls the air pulse generator to vary the frequency and volume of air pulses delivered to the patient interface such that HFCWO therapy may be programmed for a particular patient.

Abstract: An oxygen concentrator comprises a vacuum swing adsorption (VSA) gas separator for producing oxygen rich gas, and includes a reservoir for storing the product gas and a product pump for delivering the product gas from the separator to reservoir. The pump is driven by a vacuum from the gas separator.

Abstract: A product pump for pumping separated product gas from an oxygen concentrator which produces oxygen-rich product gas by utilizing a vacuum swing adsorption (VSA) process. The oxygen concentrator comprises a cartridge containing an adsorbent material for separating the product gas from ambient air, a vacuum pump which provides a vacuum source, a valve for selectively connecting the vacuum pump to the cartridge and product pump, and a reservoir. The product pump comprises a pumping chamber having a product gas inlet and a product gas outlet, a piston movable in the chamber, a vacuum inlet in the chamber on an opposite side of the piston from the product gas inlet and outlet for providing a vacuum to cause the piston to draw product gas through the product gas inlet into the chamber, and a spring for providing a spring force to force the product gas out the product gas outlet.

Abstract: A product pump for pumping separated product gas from an oxygen concentrator which produces oxygen-rich product gas by utilizing a vacuum swing adsorption (VSA) process. The oxygen concentrator comprises a cartridge containing an adsorbent material for separating the product gas from ambient air, a vacuum pump which provides a vacuum source, a valve for selectively connecting the vacuum pump to the cartridge and product pump, and a reservoir. The product pump comprises a pumping chamber having a product gas inlet and a product gas outlet, a piston movable in the chamber, a vacuum inlet in the chamber on an opposite side of the piston from the product gas inlet and outlet for providing a vacuum to cause the piston to draw product gas through the product gas inlet into the chamber, and a spring for providing a spring force to force the product gas out the product gas outlet.

Abstract: An air pulse generator includes a housing having a front wall and a back wall defining an interior region and a shell having a front portion and a back portion defining an air chamber. The front wall of the housing has first and second air openings. The front portion of the shell has first and second air ports in communication with the air chamber. The first and second air ports are aligned with the first and second air openings when the shell is mounted within the interior region of the housing.

Abstract: An oxygen separator for separating oxygen from ambient air utilizing a vacuum swing adsorption process has a mass of less than 2.3 kg. A carrier is mountable on a person to support the oxygen separator for ambulatory use.

Abstract: An improved air pulse generator produces high frequency chest wall oscillations (HFCWO) and has an improved air pulse generator. The air pulse module has a reduced size and improved shape for ease of use by a patient.

Abstract: An oxygen separator for separating oxygen from ambient air utilizing a vacuum swing adsorption process has a mass of less than 2.3 kg. A carrier is mountable on a person to support the oxygen separator for ambulatory use.

Abstract: An oxygen concentrator for providing ambulatory oxygen containing a vacuum swing adsorption (VSA) oxygen separator powered by a power pack. The separator has a plurality of nitrogen-selective adsorbent beds, each operating in VSA cycles including feed, evacuation and repressurization phases. The concentrator also contains a reservoir for storing oxygen-rich product gas produced by the VSA oxygen separator.

Abstract: A removable gas separation cartridge which includes a housing containing three columns, each having an inlet port, an outlet port, and a bed of adsorbent material. The cartridge is removable from an oxygen concentrator which separates oxygen from ambient air by using a vacuum swing absorption process.

Abstract: A method of providing concentrated oxygen product gas to a patient. The method comprises producing product gas by a vacuum swing adsorption (VSA) process with an oxygen concentrator comprising a plurality of separation columns connected to a vacuum source driven by a motor. Separated product gas is then pumped to a product reservoir. The pressure of the reservoir is monitored and used to adjust the speed of the motor based on the reservoir pressure. The separated gas is then delivered to the patient.

Abstract: An oxygen concentrator comprises a vacuum swing adsorption (VSA) gas separation system which includes a cartridge containing a mass of adsorbent material for producing oxygen, a drive which activates the gas separation system, and a power source comprising a mass. A ratio of the mass of the power source to a flow rate of oxygen produced by the oxygen concentrator is between 0.047 and 0.29 kg/LPM·hr.

Abstract: An oxygen concentrator utilizing a vacuum swing adsorption (VSA) gas separation system comprises a cartridge containing a mass of adsorbent material for producing oxygen, and a drive which activates the gas separation system. The concentrator is defined by a ratio of the mass of the adsorbent material compared to a flow rate of oxygen produced by the oxygen concentrator in a range of 0.020 to 0.214 kg/(L/min).

Abstract: Disclosed is an oxygen supply system comprising a portable oxygen concentrator for providing oxygen-rich product gas to a patient. The oxygen concentrator contains a rechargeable power source. A docking station is provided to receive the oxygen concentrator. The docking station provides electric power to operate the oxygen concentrator while it is docked and recharges the rechargeable power source.

Abstract: An oxygen concentrator comprises a plurality of adsorbent columns, each having an inlet, an outlet and abed of adsorbent material. The oxygen concentrator also includes a vacuum pump for removing separated nitrogen rich gas from the column inlets, a control valve for controlling flow of fluids in and out of the columns, and a breakthrough sensor for signaling the position of a mass transfer zone (MTZ), the breakthrough sensor controlling operation of the control valve as a function of the breakthrough sensor signal. An electric control module (ECM) receives the signal from the breakthrough sensor, and adjusts the control valve based on the signal.