Patent ID: 7637989

Claim:
A rapid cycle pressure swing adsorption oxygen concentrator comprising a sieve tank having a first molecular sieve bed filled with molecular sieve materials; a second molecular sieve bed filled with molecular sieve materials; and an oxygen storage bed communicating with both the first and the second molecular sieve beds and having a concentrated oxygen outlet tubing; and a mechanical valve mounted on the sieve tank and comprising a mounting bracket mounted on the sieve tank and having an inner space, an intake air entrance adapted to connect to a compressed air source and an exhausting exit; a valve actuator mounted on the mounting bracket and comprising a motor mounted on the mounting bracket; a rotating shaft mounted in the inner space of the mounting bracket and being rotated by the motor; five cams mounted on the rotating shaft and rotated by the rotating shaft; and five cam-actuated valves mounted in the inner space of the mounting bracket, corresponding respectively to the five cams and comprising a first valve interconnecting the first molecular sieve bed with the exhausting exit, a second valve interconnecting the intake air entrance with the first molecular sieve bed, a third valve interconnecting the first molecular sieve bed with the second molecular sieve bed, a fourth valve interconnecting the intake air entrance with the second molecular sieve bed and a fifth valve interconnecting the second molecular sieve bed with the exhausting exit.