Patent ID: 7134851
Filing Date: 2006-11-14
Classification: F04B,F05C,Y10S

Abstract:
1. A ceramic plunger pump assembly, comprising: a pump body defining a pump chamber with an inlet port and an outlet port, wherein the pump body further defines a plunger port disposed between the inlet port and the outlet port; a first check valve in fluid communication with the inlet port of the pump chamber, wherein the first check valve is configured to allow a fluid to flow only into the pump chamber; a second check valve in fluid communication with the outlet port of the pump chamber, wherein the second check valve is configured to allow the fluid to flow only out of the pump chamber; a ceramic plunger housing defining a cylindrical bore having an interior diameter, wherein the plunger housing is disposed within the plunger port; and a ceramic plunger having an exterior diameter, wherein the ceramic plunger is slidably disposed within the cylindrical bore such that when the ceramic plunger is reciprocated back and forth within the bore, the fluid is moved from the inlet port of the pump chamber to the outlet port of the pump chamber, and wherein the exterior diameter of the ceramic plunger fits the interior diameter of the bore to within a tolerance of about 1.0 microns to about 6.0 microns.