Earth working – With means to facilitate mounting of implement on motor vehicle
Reexamination Certificate
2006-08-29
2006-08-29
Novosad, Christopher J. (Department: 3641)
Earth working
With means to facilitate mounting of implement on motor vehicle
C172S684500
Reexamination Certificate
active
07096971
ABSTRACT:
A bi-directional drag grader comprising a rigid overhead support, attachable to a self propelled machine using a common receiver hitch or directly attached, a substantially rectangular rigid and collapsible frame, the frame having a leading edge and trailing edge with attachable blades, the blades having a planer sections along the length and inclined with respect to each other, the frame and support are operatively attached by forward and rearward chain lengths. Runners with stops are attached across the frame to support and position weights and prevent bending of the blades or frame while encountering loads in use. The frame and blades further comprise a design to use alternate configurations of cutting blades. The grader is configured so that the forward chains are in tension and the rearward chains are relaxed when the vehicle moves forward and vice-versa. This configuration allows for bi-directional operation.
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Novosad Christopher J.
Sempreson Jeffrey E.
Weins Michael J.
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