Caterpillar Tractor Co.

George A Fisher

Gary E Mason

Warner G Richardson

A push frame assembly for a scraper bowl is provided with a tubular structural member extending between, and being rigidly fastened directly to, the side walls of the push frame. A push block and a spreader tube are, likewise, connected between the side walls to produce a relatively rigid frame assembly. In one form of the invention, the tubular structural member has a transverse sleeve therethrough through which an ejector cylinder passes, while in another form of the invention, the tubular structural member has provision for receiving a differential and has reinforced mounts on the one side thereof for connection of ejector cylinders thereto. A method of making a push frame assembly is provided wherein a pair of side walls are fastened directly to a tubular member with a spreader tube and a push block framework connected to the side walls to produce a stronger push frame assembly.

Differential case and push-frame assembly

Differential case and push-frame assembly and a method of making same

A scraper comprises a bowl structure having an ejector assembly reciprocally mounted thereon for selectively discharging material forwardly of the bowl structure. In one embodiment of this invention, a guide rail assembly is secured interiorly on each sidewall of the bowl structure to engage a guide roller, rotatably mounted on the ejector, for guiding the same during its movements in the bowl. Each guide rail assembly comprises a cylindrical guide rod secured on a respective sidewall by a pair of locating rods disposed on either side of the guide rod and welded between the guide rod and the sidewall. The guide rod is secured to the sidewall of the bowl structure by placing a first linear portion thereof adjacent to the sidewall and then placing first linear portions of the locating rods on either side of the guide rod to space it from the sidewall at a first predetermined distance. This procedure is followed along the entire lengths of the guide and locating rods to compensate for any irregularities that may be formed in the sidewall whereafter the located rods are welded between the guide rod and the sidewall. In a second embodiment of this invention, the guide rail assemblies are secured to a push frame of the bowl structure to engage guide rollers rotatably mounted on a rearward extension of the ejector assembly.

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Joliet, IL, United States of America

George A Fisher