Patent ID: 8627897
Filing Date: 2014-01-14
Classification: A01B

Abstract:
1. A tiller comprising: a frame an axle with a pair of wheels that are rotatable about a wheel axis; an upright assembly extending from the frame; a drive mechanism supported by the frame and including a motor having an output member; a tilling implement having a drive shaft that is driven by the output member, the tilling implement comprising at least one tine plate; and a height adjustment assembly comprising a link assembly, an arm assembly and a rack, the link assembly comprising a first link, a second link and a third link, the second link having a first end, which is pivotably coupled to the axle, and a second end that is pivotably coupled to the frame, the first link being pivotably coupled to the second link between the first and second ends, the third link being generally L-shaped and is pivotally coupled to the first link on an end of the first link opposite the second link, the arm assembly having a shaft, a knob disposed on a terminal end of the shaft, a protrusion extending perpendicular to the shaft, and a collar, the shaft being disposed on an end of the third link that is opposite the first link, the third link being pivotally coupled to the rack, the collar being operable to slidably translate along the shaft wherein translation of the collar causes movement of the protrusion relative to the rack assembly, the rack being fixedly coupled to the fame, the rack having at least a first and a second groove configured to alternatively receive the protrusion, the arm assembly configured to securably locate the protrusion into the first groove wherein the at least one wheel is located at a first elevation relative to the frame and alternatively in the second groove wherein the at least one wheel is located at a second elevation relative to the frame, the first and second elevations being distinct.