Diaphragm pump with an elastic filter disk

Claim 1

A pump for pumping fluid, said pump driven by a motor having an eccentric member, said pump comprising: a pump body having an outlet valve and a casing, said casing having a surface having a concave recess and an opening for fluid communication between said recess and said outlet valve, said casing having an opening defining an intake; a flexible diaphragm mounted to the pump body adjacent said recess, said diaphragm having an aperture, said diaphragm movable to and away from said recess; a pushrod having one end rotatably mounted to said motor for axial movement with respect to said casing, said push rod having an opposite end having a dome-shaped pressure applicator adapted to be received within said recess, said pressure applicator periodically contacting said diaphragm to direct said diaphragm towards and away from said recess for pumping fluid through said opening of said surface and through said outlet valve; and an elastic disc affixed to said casing, said elastic disc having a central aperture adapted to receive said pushrod, said elastic disc resiliently supporting said pushrod centrally within said casing, said elastic disc formed of a porous filter material whereby said fluid to be pumped is filtered.