Patent ID: 7866942

Claim:
A dry running flexible impeller pump comprised of: a pump power means; a pump shaft attached to the pump power means; a pump housing into which the pump shaft is inserted; a flexible impeller inside the pump housing and attached to the pump shaft wherein when the pump power means is activated the pump shaft thereby is caused to rotate and further cause the flexible impeller to rotate inside the pump housing; the pump housing having an intake port and a discharge port wherein when the flexible impeller rotates inside the pump housing a suction on the intake port is created wherein a fluid may thereby be drawn into the intake port then into the pump housing and exhausted therefrom by the flexible impeller through the discharge port; the pump housing and the flexible impeller being further comprised of a surface coating with a lower coefficient of friction than that of the pump housing or the flexible impeller respectively wherein about fifty percent of the thickness of the surface coating of the pump housing penetrates into the surface of the pump housing and the remaining surface coating forming an outer coated surface of the pump housing.