Patent ID: 9739033
Date: 2017-08-22
CPC Classifications: E02F

Claim:
1. A rotary ditcher attachment for an implement having an implement frame supported for movement along the ground, a boom extending between a first end pivotally supported on the implement frame and a second end opposite the first end, and a tool mount supported on the second end of the boom for supporting a ground engaging tool thereon, the rotary ditcher attachment comprising: an attachment frame; a mounting bracket supported on the attachment frame and arranged for releasable mounting onto the tool mount of the implement so as to be arranged to selectively suspend the attachment frame on the second end of the boom; a rotary disc assembly comprising: a drive motor coupled to the rotor to drive rotation of the rotor relative to the attachment frame in a working direction of rotation, the drive motor being supported on the attachment frame so as to be releasable from the boom together with the attachment frame; at least one of the blades comprising a cupped front blade having (i) a main body portion oriented transversely to the working direction of rotation of the rotor and protruding forwardly from the rotor in an axial direction, and (ii) an outer portion oriented transversely to the working direction of rotation of the rotor and extending forwardly from the main body portion generally in the axial direction at a slope relative to the main body portion leading into the working direction of rotation of the rotor such that the outer end of the cupped front blade leads the inner end of the cupped front blade in the working direction of rotation of the rotor; whereby the outer portion of the at least one cupped front blade is arranged to bite into the ground to generate forces which pull the attachment frame forwardly into the ground when the rotor is rotated in said working direction of rotation and the attachment frame is displaced forwardly across the ground.