Earth working – Towed scraper with ground support wheels
Patent
1992-06-03
1994-03-01
Reese, Randolph A.
Earth working
Towed scraper with ground support wheels
172328, 172319, 172484, 172677, 1726845, E02F 376
Patent
active
052898806
ABSTRACT:
A towable road tender device for grading unpaved roadway surfaces. The tender device may be hitched to commercial vehicles but is particularly suited for use with private vehicles, such as small tractors and pickup trucks. A set of relatively lightweight frames reduce the weight to be pulled by the vehicle. The towable road tender device is sized to be operated using small-scale power take-off units commonly available in private vehicles, such as, for example, the power units of conventional front-end plows. The set of lightweight frames includes a support frame that secures the tending tool, a wheel frame that pivots the rear towing wheels either toward or away from the support frame, and an attachment frame joining the other two frames to a hitch on the towing vehicle. The attachment frame is designed to keep the support frame parallel to the plane of the underlying roadway surface as that support frame is raised or lowered. The height differential between the hitch of the towing vehicle and the support frame normally results in a lifting of the front of the support frame and a reduction in the bearing weight of the tending tool on the roadway surface. The attachment frame of the present invention eliminates this problem by pivoting upward when the tending tool is lowered down to the roadway surface. This pivoting not only eliminates the lifting, it enhances the bearing capacity of that tool.
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"Everson Automatic Grade Plane", Oct. 1979.
The York Company-Product description of a York rake.
Bohan Thomas L.
Caseiro Chris A.
Reese Randolph A.
Warnick Spencer
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