Patent ID: 6202714
Filing Date: 2001-03-20
Classification: B60S

Abstract:
An air pump comprising:a head member provided with a receiving cell having in one end an opening in communication with atmospheric air, said receiving cell provided in other end thereof with an air duct for communicating said receiving cell with the atmospheric air, said air duct provided at one end thereof with an air nozzle, said head member provided in one side thereof with a connection portion which is in turn provided with a channel and a guide cell;a movable block disposed in said receiving cell and provided with at least one leakproof ring fitted thereover for sealing off inner wall of said receiving cell;a spring disposed in said receiving cell such that said spring urges said movable block and said air duct;a flow guiding member of a tubular construction and having a needle-shaped end, said flow guiding member being disposed in said guide cell of said connection portion such that said needle-shaped end faces a direction opposite to said receiving cell of said head member;a control valve disposed in said guide cell such that said control valve is contiguous to one end of said receiving cell;a spring disposed between said control valve and said flow guiding member for forcing said control valve to shut off communication between said guide cell and said receiving cell;a press rod fastened pivotally with an outer end of said head member for pushing said movable block to move so as to control the opening and the closing of said control valve;an inner tube connected at one end thereof with said connection portion and provided therein with a receiving space to accommodate an air bottle, said receiving space being in communication with said channel and said guide cell, said receiving space having one end in communication with atmospheric air via a passage;a check valve disposed in said passage for allowing one-way flow of air into said receiving space;an outer tube fitted over said inner tube to form therebetween a compressible space; anda one-way air valve disposed between said inner tube and said outer tube for allowing one-way flow of atmospheric air into said compressible space such that said outer tube moves in relation to said inner tube so as to compress air contained in said compressible space, thereby enabling the compressed air to be released from said air nozzle via said check valve.