Patent ID: 6742541
Filing Date: 2004-06-01
Classification: F16K,Y10T

Abstract:
An apparatus for indicating a state of a valve, the valve having a stem being movable in closing and opening directions between closed and open valve positions, the apparatus comprising:a first cam system being biased in the opening direction, the first cam system capable of adjustably engaging the stem when the stem is adjacent to the closed valve position and being movable by the stem in the closing direction once engaged, and a second cam system being integral to or separate from the first cam system and being biased in the closing direction, the second cam system capable of adjustably engaging the stem when the stem is adjacent to the open valve position and being movable by the stem in the opening direction once engaged, and an indicator moveable by the first and the second cam systems and capable of indicating at least open, intermediate, and closed states of the valve.