20150075645 | Handle Mechanism to Prohibit Accidental Valve Operation - A handle mechanism for a railway tank car includes a first turn prohibitor at the skid and a second turn prohibitor at the support bracket for an extension arm. The extension shaft is pivotally mounted to a stem adapter so that it can be displaced from the axis of rotation for the valve stem when the valve is in the closed position. The extension shaft must be aligned with the axis of rotation of the valve stem in order to allow the operator to turn the handle and consequently the extension shaft and valve stem to open the valve. | 03-19-2015 |