Patent ID: 6953326

Claim:
An air pump comprising; a connector to be connected with an air nozzle of an object to be inflated; a holder block having a front end connected to said connector, a valve chamber, an air cylinder air inlet and a manual charge air inlet respectively running through said valve chamber from a rear side thereof, and an air passage running through said valve chamber to the front side of said holder block for communicating with said connector; a press button mounted in said valve chamber and movable between a first position and a second position, said press button having a part exposed out of said holder block for being pushed, at least one air seal means adapted to seal a gap between said valve chamber and said press button and to separate said air cylinder air inlet and said air passage of said holder block for said manual charge air inlet be in communication with the air passage of said holder block while said press button is moved to said first position, said air cylinder air inlet being in communication with said valve chamber and the air passage of said holder block while said press button is moved to said second position; a spring member mounted inside said holder block to support said press button in said first position; a fixed cylinder having a front side connected to the rear side of said holder block, an inside space in communication with said air cylinder air inlet and said manual charge air inlet and holding an air cylinder, said air cylinder holding a compressed gas and having an output nozzle in communication with said air cylinder air inlet, and an air inlet at a rear side thereof; and a movable cylinder sleeved onto said fixed cylinder and axially movable relative to said fixed cylinder and adapted to let outside air pass through said air inlet into the inside of said fixed cylinder while being reciprocated on said fixed cylinder.