Earth working – Tool – standard or connection – Tool is transversely elongated blade
Patent
1994-04-08
1995-03-14
Reese, Randolph A.
Earth working
Tool, standard or connection
Tool is transversely elongated blade
172753, 37452, 37453, 403381, E02F 928
Patent
active
053969634
DESCRIPTION:
BRIEF SUMMARY
This invention relates to improvements in blades for earth moving machines such as scrapers, graders, bulldozers and so on (hereinafter referred to as "scrapers") and it refers particularly to the cutting edges- the operative cutting edge portions of the blades.
The ground-engaging tools of bulldozers, scrapers, graders and other earth moving machines are made in a wide variety of types, according to the purposes for which the tools are to be used. In general, there are replaceable edge members capable of being bolted in position on a support assembly, such as a scraper moldboard, and those edge members may be made to suit a level cut arrangement (with the front edges of the several members all in line), in a drop centre or stinger arrangement (when the middle part projects forwardly of the two or more side parts), with integral forwardly-projecting teeth, with replaceable forwardly projecting teeth, substantially planar in shape, or, if necessary, curved, with front and rear edges so that they may be reversed, and so on. The edge members for a machine may be made in one piece to extend the full width of the tools to which they are to be attached or they may be made in shorter sections so that three four or more members are bolted in position on a support member to make up the full width of the earth-engaging tool.
In my earlier U.S. Pat. No. 4,457,380 there is described and defined a blade for scrapers. However, that blade has been found to have certain limitations. If it is desired to remove a female blade to either rotate it or replace due to wear, or for any other reason, both that blade and the adjacent two male blades, must be removed. Also, it is difficult to rotate just the one female blade due to every second blade being different.
This invention is applicable to all such edge members but for simplicity of description they will be referred to as cutting edges or edge members for scraper blades without limiting the invention to the blades of such machines.
This invention has been devised particularly with the object of providing a construction of cutting edge for a scraper blade such that the range of use of the cutting edge will be greatly increased. Another object is to provide cutting edges so constructed that they may be individually reversed in position, interchanged, and/or used in the straight or level-cut operational position or in the so-called "drop" or "stinger" position, as required. A further object is to provide cutting edges which, individually, will be easy to replace and/or adjust in position.
Yet another object is to provide a cutting edge of such constructions that a broken or worn part of the cutting edge may be replaced without the necessity of replacing the whole cutting edge.
The invention devised with these and other objects in view provides cutting edge members for scraper blades having means for interlocking with adjacent cutting edges whereby each cutting edge, when securely mounted in position on a scraper moldboard, will be engaged with the adjacent cutting edge or edges, the cutting edge members being adjustable and reversible in position one relative to the other.
It is preferred that the means for interlocking be angle dovetailed parts on the opposite side edges of the cutting edge members so arranged that when two such cutting edge members are mounted on a scraper moldboard in side-by-side relationship the angled dovetailed parts on one side of one such cutting edge member will interengage with those on the adjacent side of the next cutting edge member. It is also preferred that each of the cutting edge members be provided with at least two fastening holes by which it may be fastened to the scraper blade, and that the dovetailed parts have a spacing or pitch related to the location and spacing of said holes so that if a cutting edge member is moved, relative to an adjacent cutting edge member, the dovetailed parts will still interengage so as to lock together the two said cutting edge members.
The angled dovetailed parts on one cutting edge member are not tapered, s
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Pezzuto Robert
Reese Randolph A.
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