Patent ID: 7726954
Filing Date: 2010-06-01
Classification: F04B,Y10T

Abstract:
1. A diaphragm pump comprising: an electric motor; a motor shaft, driven by said electric motor for rotation about an electric motor shaft axis; an eccentric drive, driven by said electric motor, via said motor shaft, to provide reciprocal driving along a pump driving axis, said eccentric drive including an eccentric drive shaft rotating about an eccentric drive shaft axis, said eccentric drive shaft axis being coaxial with said electric motor shaft axis; a non-rigid coupling interconnecting said motor shaft and said eccentric drive shaft; a diaphragm pumping assembly having a fluid inlet and a fluid outlet communicating with a pumping chamber, said pumping chamber having a diaphragm arranged to be reciprocally driven about said pump driving axis; and a flange fixed to said electric motor and a housing which houses said non-rigid coupling, wherein said flange comprises at least one bore and said housing comprises at least one socket, said at least one socket having a diameter larger than a diameter of an attachment bolt.