Patent ID: 6422832
Filing Date: 2002-07-23
Classification: F04B

Abstract:
An air pump capable of inflating and deflating an inflatable object interchangeably, said air pump comprising:a main body of a long columnar body and having a bottom base, a cylinder duct, an air outlet, and an air inlet, said bottom base being located at one end of said main body to enable said main body to be rested on a surface, said cylinder duct being located in an interior of said main body, said air outlet and said air inlet being located at a predetermined position of an external side of said main body such that said air outlet and said air inlet are in communication with said cylinder duct; a compressing member formed of a handle, a piston, and a connection rod connecting said handle with said piston, said piston being movably disposed in said cylinder duct of said main body such that said piston moves back and forth in a predetermined range, and that said piston divides said cylinder duct into a first air chamber and a second air chamber, said first air chamber being in communication with said air outlet and said air inlet; two check valves disposed respectively at said air inlet and said air outlet, so as to enable air to enter said first air chamber via said air inlet, and to enable air in said first air chamber to be discharged via said air outlet; an adjustment member having a first connection port and a second connection port in communication with said first connection port, said adjustment member being pivoted to said main body such that said adjustment member is displaced between a first position and a second position, said first connection port of said adjustment member being in communication with said air outlet of said main body at such time when said adjustment member is located at said first position, said first connection port being in communication with said air inlet of said main body at such time when said adjustment member is located at said second position; and a hose fastened at one end thereof to said second connection port of said adjustment member.