Patent ID: 7984837

Claim:
A stapler, which, in the course of a reciprocating working stroke, staples a workpiece, wherein the stapler has a transmission adapted to be driven by an electric motor and has a motor-drive circuit including a circuit-breaker closed by a trigger to initiate the working stroke from a starting position as a result of the workpiece acting on the trigger, wherein the transmission includes a wheel adapted to rotate in only one direction through 360°, that commences rotation when the circuit-breaker is closed by the trigger, wherein the wheel is operatively connected to a mechanism of the transmission that includes a first spring, wherein initial rotation of the wheel controls the mechanism of the transmission to allow a circuit-breaker closing force of the first spring to keep the circuit-breaker closed, even if the workpiece is no longer acting on the trigger, until rotational movement of the wheel, during a return phase of the working stroke to the starting position, approaches completion of one revolution, whereupon the mechanism of the transmission is controlled by the wheel to block the circuit-breaker closing force of the first spring, so that the circuit-breaker can be opened.