Patent Number: 6,293,354

Title: Disc unit

Abstract: There is provided a disc unit for mounting a plurality of discs to an outer end of a mouldboard of a grader. The disc unit includes a mounting bracket for securing to a rear face of an outer end portion of the mouldboard. A frame is pivotally mounted on the mounting bracket and supports an axle which mounts the discs thereon. A hydraulic cylinder pivots the frame supporting the discs in relation to the mounting bracket for raising and lowering the discs to engage the ground at various depths of cut. A cushion valve releases the hydraulic cylinder in the case of an obstruction engaging the discs. The discs include a concave inner surface which are arranged to face towards the grader and partially in the direction of travel for urging particulate material away from the shoulder and towards a center of the road.

Inventors: Garratt; Lyle C. (Milestone, Saskatchewan, CA), Terry; Eldon J. K. (Milestone, Saskatchewan, CA)

Assignee:

International Classification: A01B 49/02 (20060101); A01B 49/00 (20060101); A01B 61/04 (20060101); A01B 61/00 (20060101); E01C 23/00 (20060101); E01C 23/082 (20060101); E01H 1/00 (20060101); E02F 3/76 (20060101); A01B 049/02 ()

Expiration Date: 09/25/2018