Patent ID: 8230943

Claim:
An electrical tool, comprising a drive shaft and a pair of driven members, wherein the drive shaft is selectively connectable to the driven members by a respective one of a pair of coupling sleeves, wherein the coupling sleeves are actuated through a rotatable mechanical actuating element, wherein the actuating element comprises a transmission portion stationary with respect to the actuating element, the transmission portion directly contacting the respective coupling sleeve, wherein at least one of the driven members is selectively locked against a rotational motion by a locking device that is biased toward a locked position, wherein the actuating element and the locking device cooperate in direct contact with each other to move the locking device to an unlocked position and allow the locking device to move to the locked position, wherein the driven members are a countershaft gear and a tumble drive hub, and wherein the actuating element alternatively switches between a first state, in which the electrical tool performs a rotational motion of the countershaft gear without moving the tumble drive hub, a second state in which the electrical tool performs a motion of the tumble drive hub with the countershaft gear being rotationally fixed by the locking device, and a third state in which the electrical tool performs a simultaneous motion of the countershaft gear and the tumble drive hub.