Patent ID: 6889778
Filing Date: 2005-05-10
Classification: B25B

Abstract:
1. A rotary tool operable in a forward mode and a reverse mode at a plurality of speeds, the plurality of speeds including a maximum speed, the rotary tool comprising: a housing having a forward end and a rearward end and defining an axis extending between the forward end and the rearward end, the rearward end supporting a motor operable in a forward direction in the forward mode and a reverse direction in the reverse mode; an output shaft supported in the forward end of the housing and rotatable about the axis; and a hammer supported in the housing and operable to transfer a first rotational force from the motor to the output shaft in the reverse mode and a second rotational force from the motor to the output shaft in the forward mode, the first force being greater than the second force, wherein the hammer defines a central aperture and includes a first jaw extending into the central aperture and a second jaw extending into the central aperture, the first jaw and the second jaw being non-symmetrical.