Patent ID: 9453504
Filing Date: 2016-09-27
CPC Classification: F04B,F16H

Claim Text:
1. A diaphragm pump comprising: a motor serving as a driving source; a crank that is rotated by said motor and has a ring-shaped insertion groove in an upper surface; a pump chamber that is formed from a diaphragm including a diaphragm portion and expands/contracts in accordance with reciprocal motion of said diaphragm portion wherein said insertion groove opens toward said diaphragm; a driver that reciprocally moves said diaphragm portion by an oscillation operation; a driving shaft that projects from said driver and engages with said insertion groove of said crank so as to orbit a rotation axis of said crank, a lower end of said driving shaft contacting with an inner surface of said insertion groove; and an engaging portion that is formed in said insertion groove, and engages with said driving shaft to make said driving shaft follow the rotation of said crank, wherein said driving shaft and said driver are integrally formed from a single material or different materials.