Patent ID: 7370664
Filing Date: 2008-05-13
Classification: F16K,Y10T

Abstract:
1. A diaphragm valve comprising: a valve body including an inlet port, an outlet port, and a valve seat; and a diaphragm assembled with the valve body, the diaphragm being configured to flex into sealing engagement with the valve seat to inhibit fluid flow from the inlet port to the outlet port and out of sealing engagement with the valve seat to allow fluid flow from the inlet port to the outlet port, the diaphragm including a coating disposed on the diaphragm in a pattern comprising an outer ring of coating on the diaphragm and an uncoated area of the diaphragm that extends radially inward from the outer ring; wherein the pattern further comprises an inner ring of coating on the diaphragm that is spaced apart from the outer ring of coating by the uncoated area of the diaphragm that extends radially inward from the outer ring to the inner ring, wherein the pattern further comprises a second uncoated area of the diaphragm that extends radially inward from the inner ring.