Patent ID: 7395876

Claim:
A drill/driver including: a motor ( 6 ) for rotating a motor output shaft ( 14 ); a gearbox ( 16 , 18 , 20 , 22 , 24 ) coupled to the motor output shaft ( 14 ) and having a gearbox output shaft ( 26 ), the gearbox arranged to provide a change in rotational speed as between the motor output shaft ( 14 ) and the gearbox output shaft ( 26 ) and wherein the gearbox output shaft defines a first central output axis (A-A) of the drill/driver; a first offset output gear ( 30 ) driven by and coupled to the gearbox output shaft ( 26 ), wherein the first offset output gear is radially offset from the first central output axis (A-A) and is freely rotatable thereabout; the first offset output gear itself defining a second axis (B-B), which second axis is offset from, parallel to and rotatable about the first central output axis (A-A); a second offset output gear ( 52 ) driven by and coupled to the first offset gear ( 30 ), wherein the second offset output gear is radially offset from the second axis (B-B) defined by the first output gear ( 30 ) and wherein the second offset output gear ( 52 ) is freely rotatable about the second axis (B-B); wherein the first and second offset output gears ( 30 , 52 ) are rotatably adjustable about the first central output axis (A-A) and the second axis respectively, thereby to permit the second offset gear to be selectably co-axial with the first central output axis, or radially offset therefrom, and wherein the second offset output gear drives a final output shaft ( 50 ) of the drill/driver.