Patent ID: 8621861

Claim:
An actuating fitting comprising: a housing in which is arranged a piston, wherein the piston is moveable in a cylinder space by an actuating element for displacing fluid; an equalizing space arranged within the cylinder space, wherein the piston is arranged in the cylinder space between a pressure space and the equalizing space; and a passage having a valve device and connecting in a closeable manner the pressure space to the equalizing space, in which the valve device is formed in such a way that, on actuation of the actuating element, the valve device closes and an actuating force is then applied to the piston, wherein the equalizing space does not communicate with the pressure space when the actuating force is applied to the piston by the actuating element, wherein the piston has an equalizing space section which substantially comprises a cylindrical wall and in which the equalizing space is arranged in the equalizing space section.