Patent ID: 11964105
Assignee: INOGEN, INC.
Field: Chemical engineering (Chemistry)
Classification: CPC A  B  C | IPC A  B  C

Claim 0:
1. An apparatus, comprising:
at least one sieve bed configured to provide oxygen-enriched gas;
a product tank arranged downstream of the at least one sieve bed and configured to receive the oxygen-enriched gas from the at least one sieve bed;
an outlet port configured to be connected to a respiratory ventilation device;
a product gas accumulator tank downstream of the product tank and at the outlet port;
a tank pressure measurement device configured to measure pressure of the oxygen-enriched gas in the product tank;
a flow measurement device arranged between the product tank and the product gas accumulator tank, the flow measurement device configured to measure flow of oxygen-enriched product gas;
a pressure regulator arranged between the product tank and the product gas accumulator tank, the pressure regulator configured to regulate a pressure of the oxygen-enriched gas flowing from the product tank at a product tank pressure down to a target delivery pressure; and
a controller configured to receive one or more pressure measurements from the tank pressure measurement device and receive one or more flow measurements from the flow measurement device, the controller further configured to control flow to the product gas accumulator tank;
wherein the apparatus is configured such that, when the outlet port is connected to the respiratory ventilation device, the product gas accumulator tank stores a quantity of the oxygen-enriched gas received from the product tank between each of a plurality of patient inspiratory efforts and supplies the stored oxygen-enriched gas at a consistent flow rate to the outlet port during each of the plurality of patient inspiratory efforts.