Patent ID: 8480375

Claim:
An auto-stop air pump comprising: a housing having an upper chamber and a lower chamber communicating with each other via a communicating hole; a main inlet and an outlet formed through the housing respectively and communicating with the upper chamber; an auxiliary inlet formed through the housing and communicating with the lower chamber; and an air valve mounted in the housing adjacent to the auxiliary inlet; a blower mounted in the housing and having a motor mounted in the lower chamber of the housing and having a shaft; and a dual-sided impeller mounted in the upper chamber of the housing , mounted securely around the shaft of the motor and having a top side facing and corresponding to the main inlet of the housing; a bottom side facing and corresponding to the communicating hole of the housing; and an annular side facing and corresponding to the outlet of the housing; and an auto-stop device mounted in the housing and having a shell having an upper chamber communicating with the upper chamber of the housing; and a lower chamber communicating with the lower chamber of the housing; a deformable film mounted in the shell and separates the upper chamber and the lower chamber of the shell; a micro switch mounted in the lower chamber of the shell and pressed by the film; and an actuating unit mounted movably through the shell and abutting the film.