Patent ID: 6152173
Filing Date: 2000-11-28
Classification: F16K,Y10T

Abstract:
A check valve comprising:a valve body comprising an inlet and an outlet and defining a flow path therebetween, the valve body further comprising a recess for accommodating a hinge disposed transverse to said flow path,said hinge being connected to a disc for pivotal movement of said disc between a closed position isolating said outlet from said inlet and an open position providing communication between said inlet and outlet,an indicating device having an exposed element extending outside of said valve body to provide a visual indication of a position of said valve disc, an engaging element, connected to said exposed element, positioned within said valve body to engage the valve disc, a movable seal member to provide an interface between an interior of said valve body and an exterior of said valve body, with said engaging element and said exposed element being connected to said seal member, and a mechanism to hold said engaging element in contact with said valve disc.