Patent ID: 7632084
Filing Date: 2009-12-15
Classification: F01C,F04C,F05C

Abstract:
1. A vane rotary type air pump in which a pump mechanism and a drive motor are provided side-by-side, said pump mechanism comprises a cylinder having a cylindrical inner surface, a cylindrical rotor which eccentrically rotates in said cylinder, a vane groove having an opened end in an outer peripheral surface of said rotor and a closed end on the side of a center of said rotor, a vane which slides in said vane groove, a rotation shaft which rotates in unison with said rotor, and front and rear plates which are mounted on both end surfaces of said cylinder such as to sandwich said rotor and said vane, said pump mechanism is formed with a plurality of pump spaces, and said rotation shaft is driven by said drive motor to vary volumes of said pump spaces, wherein said opened end of said vane groove is provided in a reversed rotation direction region of said rotor with respect to straight line connecting a center of said rotor and said closed end of said vane groove wherein said front plate is formed with an intake opening and a discharge port, said rear plate is formed with an intake port and a pseudo-discharge port, said intake port of said rear plate is disposed at a position opposed to said intake opening of said front plate, and said pseudo-discharge port of said rear plate is disposed at a position opposed to said discharge port of said front plate.