Patent ID: 8740021

Claim:
A powered dispensing tool comprising: a housing; a motor at least partially positioned within the housing; a rack operably coupled to the motor for powered translation in at least one of a forward direction and a reverse direction; and a transmission selectively operably coupling the motor and the rack, the transmission including an input ring rotatable in response to rotation of the motor in a first direction corresponding with powered translation of the rack in the forward direction, a first clutch member engaged with the rack through at least one intermediate gear, a second clutch member that receives torque from the input ring and that is movable in response to rotation of the motor in the first direction toward a first position engaging the first clutch member, and movable in response to rotation of the motor in an opposite, second direction toward a second position disengaged from the first clutch member, a drive shaft having a non-circular cross-sectional shape with at least one flat, and a hub coupled for co-rotation with the input ring and having a lug engageable with the flat in response to rotation of the motor in the first direction to transfer torque to the drive shaft, wherein the lug is disengageable from the flat in response to rotation of the motor in the second direction, without rotating the drive shaft.