Patent ID: 8210834

Claim:
An air pump comprising: a housing having an inner chamber defined in the housing; a first opening formed through a top of the housing and communicating with the inner chamber of the housing; and a second opening formed through a bottom of the housing, aligning with the first opening of the housing and communicating with the inner chamber of the housing; a blower mounted in the inner chamber of the housing and having a casing having a first air chamber formed adjacent to a front end of the casing; a second air chamber formed adjacent to and communicating with the first air chamber; an air inlet formed through a sidewall of the casing and communicating with the first air chamber of the casing; and an air outlet formed through the sidewall of the casing and communicating with the second air chamber of the casing; a motor mounted securely on the front end of the casing and having a shaft mounted through the front end of the casing and the first air chamber and protruding to the second air chamber of the casing; and a dual-side impeller disposed in the second air chamber of the casing and mounted securely on the shaft of the motor; a switch assembly mounted slidably in the inner chamber of the housing and between the blower and the bottom of the housing and having a slider having a switching hole formed through the slider, corresponding to the second opening of the housing and aligning with either the air inlet or the air outlet of the casing; an inner sidewall defined around the switching hole of the slider; and a guider obliquely disposed in the switching hole and having an upper end and a lower end being in opposite directions and connected to the inner sidewall of the slider; and a driving device connected to the slider and sliding the slider back and forth; an air valve mounted on the bottom of the housing through the second opening of the housing, selectively sealing the second opening of the housing and having a supporter having a disk mounted in the second opening of the housing; an upper pintle longitudinally formed axially from an upper surface of the disk and having a distal end abutting the guider of the slider; and a lower pintle longitudinally formed axially from a lower surface of the disk; a seal being a disk, being rubber, mounted on the lower surface of the disk of the supporter and selectively abutting the bottom of the housing; and a resilient component mounted around the lower pintle of the supporter and abutting the seal; and a fan guard mounted on the bottom of the housing around the air valve and abutting the resilient component of the air valve.