Oxygen-enriched air
US4065272A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1975 |
| Grant date | Dec 27, 1977 |
| Priority date | — |
| Expiry date | Dec 30, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2259/4533
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention provides a method for producing oxygen-enriched air for respiration which method utilizes an apparatus which comprises at least one bed containing an adsorbent which preferentially adsorbs nitrogen from air, an air inlet at one end of the bed, an oxygen-enriched air product outlet line connected to the other end of the bed, a reservoir in the outlet line for storing pressurized product gas, a pressure regulator located in the outlet line downstream of the reservoir and adapted to regulate the pressure of product gas in the outlet line downstream of the regulator to a predetermined value, a restriction device located in the portion of the outlet line between the bed and the reservoir to control gas flow in such portion of the outlet line, a valved vent line from the air inlet end of the, or each, bed to permit release of any superatmospheric pressure in such bed and a valved line leading from the air inlet end of the, or each, bed to a vacuum pump to permit evacuation of such bed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.