Patent ID: 7059584

Claim:
A diaphragm valve, moveable between a fully open position and a fully closed position, the valve comprising: (a) a bonnet having an abutment surface; (b) a stem moveable relative to the bonnet, the stem having at least one aperture; (c) a handle being freely rotatable on the stem and freely axially slidable on the stem, the handle having a stop with a surface for contacting the abutment surface of the bonnet; and (d) a pin extending through the handle and into the at least one aperture in the stem for fixing the position of the handle relative to the stem, (e) wherein the at least one aperture comprises a slot that extends radially into the stem and axially along the stem and has a circumferential width adapted to receive the pin, the slot having a first end and a second end and the pin being moveable between a first position adjacent the first end and a second position adjacent the second end, and wherein valve when the pin is in the first position and the valve is in the fully closed position the surface of the stop of the handle contacts the abutment surface of the bonnet.