Patent ID: 8496069

Claim:
A device for cultivating soil or brushing debris comprising: a frame supporting a transmission and a motor, the transmission defining a housing; a drive shaft at least partially surrounded by the housing and being driven by the motor through the transmission, the drive shaft being a worm having a first set of threads on an exterior surface thereof and a second set of threads on the exterior surface thereof, the first set of threads being spaced-apart from and angled with respect to the second set of threads; a first gear, a second gear, and a third gear all supported at least partially within the housing, external teeth of the second gear being in constant engagement with external teeth of both the first and third gears, at least one of the first and third gears being configured to be selectively disengaged from the drive shaft; a shaft fixedly attached to the second gear; and an assembly removably attachable to the shaft.