Patent ID: 8545603

Claim:
An apparatus for producing oxygen comprising: two adsorber beds (D 1 ,D 2 ) each connected to at least one reversible blower (B 1 ,B 2 ) through isolation valves ( 1 , 2 ), an equalization line which has two valves ( 3 , 4 ) along with a buffer tank (E 1 ), and two product valves ( 5 , 6 ); and a separate motor (M 1 ,M 2 ) to drive each blower, powered by variable frequency drives (V 1 ,V 2 ) and connected to a super capacitor (SC); wherein a control method actuates rotating machinery associated with the at least one blower sequentially in clockwise and anticlockwise directions to supply air to the inlet of one bed while regenerating the other bed by removing adsorbed nitrogen using a vacuum.