US1799139A - Plow for scraper buckets - Google Patents

Description

March 31, 1931. R. H BEAUMONT 1,799,139

PLOW FOR SCRAPER BUCKETS Filed Nov. 30, 1928 W I ff H. eaamofz/ We (Bl Shu, A

Patented Mar. 31, 1931 UNITED STATES PLSTEN'I OFFICE i ROBERT n. BEAUMONT, OE RADNOR, PENNSYLVANIA, ASSIGNOR To R, n. BEAUMONT COMPANY, or PHILADELPHIA,rENNsYLvANIA., A coaroaarron OE rENNsYL- VANIA PLOW FOR SCR/.ABER BUCKETS Application filed November 3,0, 1928. Serial No. 322,657.

This invention relates to scraper buckets for use in handling large quantities of earth, coal, or the like. Essentially these buckets consist of two members joined together so as to form a V. Two cables are attached to the divergent arms of the V and the bucket is dragged by them with the divergent arms forward. At the base of the V there is attached another cable which serves as a re- 19 turn cable. These arms may themselves be V-shaped in cross section 0r shaped with a vertical side wall and inwardly extending top and bottom walls. On the lower edge of the scraper are attached inwardly and downi; wardly extending knife like members which serve to scarify the surface of the material to be scraped and to guide the bucket in a straight path over the material on which it is working. It is the purpose of this inven- 20 tion to provide the forwardly extending ends of the divergent arms vwith plows or cutting edges which are formed on the ends of the arms with rounded or stream like lines. A

difficulty with these buckets heretofore has been a tendency on their partto cut into the sides of the trench which is formed when the scraper is excavating. By means of the provision of these plows the front end of the scraper cuts into the material with minimum 3o of resistance.

Another difculty of the Scrapers heretofore has been a tendency on the part of the front edge of the bucket to fail to cut into the material being worked on. This caused all the work to fall on the back portion of the bucket with the consequent wear at that joint. By causing the front ends of the bucket to cut into the material the wear is distributed along the entire lower sharp cutting edge.

For an embodiment of this invention reference is made to the specification below and the drawings attached.

Figure 1 is a top plan of the scraper the end of one ofthe divergent arms being shown in cross section.

Figure 2 is a side elevation.

Figure 3 is a front elevation.

Figure t is a detailed cross section on line L -4t of Figure l.

The scraperv is formed of arms l and 2 of V-shaped cross section to be fastened together atan angle. The divergent ends of these arms are attached to chains 3 to serve to draw the scraper over' the material ready f to be conveyed by it. At the joint of members l and 2 is attached a ring member at to serve as a fastening for a return cable not shown, `Allong the bottom edge of arms 1 and 2 are fastened knife-like members 5 which extend in an inward and downward direction. The number of' these members which is employed depends: upon the hardness of the material which is to be worked upon. The divergent ends of arms l and 2 are provided with rounded or stream line sections 6 and 7 respectively. These sections 6 and 7 terminate in vertical cutting edges to which cables 3 are attached. lThese vertical cutting edges curve in elevation as viewed from the side or from the front as shown in the drawings.

From the cutting edges, stream lines join into the cross sections of the arms l and 2 by smooth curves. The upper parts of the rounded portions project inwardly toward each other forming hoods or domed portions. These molded tips give somewhat the eect of the well known plow share except that instead of turning a furrow, as does the plow share, they cut sharply through the material worked upon in the manner of a knife or plane. These cutting edges serve to introduce the front end of the scraper into the material and thus distribute the cutting force or shear along the entire lowercutting edge of the scraper.

The applicant does not intend to be limited in his practice of the invention save by the scope of the attached claims.

I claim:

l. A scraper comprised of two divergent straight arms having inwardly inclined edges, a plow at the end of each of the divergent arms, parallel vertical cutting edges on the plows blended into the inwardly inclined edges of the arms, and inwardly projecting rounded portions above the cutting edges forming Overhanging hoods.

2. A scraper composed Of two divergent ai CTL straight arms having inwardly inclined edges, and a plow at the end of each of the divergent arms, said plows having vertical portions parallel to each other and terminating at the forward ends in vertical cutting edges and rounded or stream line portions blending from said plows into said arms, the upper parts of said portions projecting inwardly towards each other above said parallel portions to Yform hoods.

3. A scraper comprised of a straight arm substantially V-shaped in cross section and uniform in size throughout its length, a second arm substantially similar to the rst arm, the arms being attached together at one of their ends at an angle to each other with their inwardly projecting edges facing each other, a plow formed on the divergent ends of each of the arms, parallel vertical cutting edges on each of the plows, a rounded domed portion above and behind each cutting edge, stream line connecting portions between the lower branches of the V-shaped cross sections of the arms and the cutting edges, and stream line connecting portions between the upper branches of the V-shaped cross sections of the arms and the rounded domed portions.

ROBERT H. BEAUMONT.

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