Patent ID: 8136539

Claim:
A wash ring comprising: a top surface; a bottom surface; an outer side surface; an inner surface forming a bore comprising an inner diameter, a long axis, an upper bore portion, and a lower bore portion, wherein the upper bore portion has an opening in the top surface and the lower bore portion has an opening in the bottom surface; an inlet comprising an opening in the top surface, bottom surface or outer side surface, and an opening in the upper bore portion; and an outlet comprising an opening in the top surface, bottom surface or outer side surface, and an opening in the lower bore portion; wherein the inner diameter of the bore is adapted to receive a probe such that when the probe is present in the bore, a space is formed between the exterior surface of the probe and the inner surface forming the bore, wherein a width of the space between the exterior surface of the probe and the inner surface forming the bore is about 0.008 inches to about 0.12 inches, wherein the diameter of the outlet opening in the inner surface forming the bore is larger than the diameter of the inlet opening in the inner surface forming the bore, and wherein the bore is cylindrical between the upper port and the lower port.