Patent ID: 8500417
Filing Date: 2013-08-06
Classification: F01C,F04B,F04C

Abstract:
1. A motorized vacuum pump apparatus, comprising: an electric motor operating in response to an electric signal; a pumping unit connected with a motor shaft of the electric motor; and a sound absorbing unit enclosing the pumping unit and having an inlet for sucking external air, a damping chamber and an outlet; wherein the sound absorbing unit is directly combined with the electric motor; wherein the external air is compressed and supplied by the pumping unit to the damping chamber and discharged outside the sound absorbing unit through the outlet such that noise is reduced by damping compressed air in the damping chamber; wherein passages for the pumping unit are formed within the sound absorbing unit; wherein the electric motor has a drainage formed downward such that water condensed from the compressed air is discharged therethrough by gravity; and wherein the drainage is formed along a direction of a center axis in the sound absorbing unit and the outlet is formed in a perpendicular direction to the drainage.