US1633057A - Cutting section for road-scraper blades - Google Patents

Description

June 21, 1927. 1,633,057

C. O. WOLD CUTTING SECTION FOR ROAD SCRAPER BLADES Filed July 15, 1926 C3424 C2 Vl Zxo Patented done 21, 19 27.

CARL O. WOl'L-D, @Ii MINEEAPOLIS, MINNESQILA.

CUTTING SEGTIQ'BT FDR lEtUAD-SCRAPER BLADE$.

This invention rel Application filed my 15,

ates to improvements in,

the renewable cutting sections or edges of road scraper blades. The object of the invention is to provide 5 a cutting section of the type specified havlid ing a still and firm edge portion that will not vibrate or chatter as the scraper is drawn or passed over a road surface, which may be more or less uneven andxwhich will often have small stones or loose gravel scattered thereon,

and formed integrally therewith is a thinner broad plate portion adapted to fit against the front surface of the lower part of a scrap mold board and to be rigidly secured thereto.

A particular object of the invention is to provide such a cutting section that can be produced from a billet at. a single operation between suitable rolls.

of proper dimensions by passing the billet The invention consists generally in the constructions and combinations hereinafter described and particularly pointed out in the claims.

.In the accompanying drawings torming part of this specification,

Figure 1 is a transverse sectional view of a cutting section embodying my invention and illustrating the application of the cutting section to a mold board;

cutting portion of Figure 2 is a front elevation of the sod represents the lower or the section and 3, the

upper or plate portion by which, whenin use, the section may the frontof the reel The full front of tion Q and portion caved or curved from its be firmly secured upon d board. a

the section (both por- 3) is preferably conlower to its upper edge-preferably upon substantially l2 radius. The portion vided at its lower edge a, and the lowe 2 of the section is pro front face with a cutting r face 5 of the section is hat and smooth and is formed to rest upon the surface of the road as the scraper is moved over such surface.

The upper or plate portion 3 of the sec=- 7 tion has its front surface nation of the of the forming a coatin curved face of the portion. 2 section. The plate portion 3 is pret erably or" about one-half the thickness of the lower portion, a sho ulder 6 being termed at was. Serial in. lesser.

the rear Oil the portion 3 and the top of the portion 2 The two SllI'ffiCQS--iill6 top of portion 2 and the rear of portion 3- are united by the curved surface 7 The upper edge of the portion 3 is also preferably curved or rounded 0d at 8 as shown,

lhe portion 2 of the section projecting downwardly and rearwardly from the portion 3, and of about twice its thickness, is suiliciently stifl and rigid to prevent vibration or chattering and the broad flat surface of the upper portion permits of a firm and rigid connection to the mold board. lfhe lower edge of the portion 2 also forms a thick wearing surface to contact with the surface of the road. r

The upper portion 3 of the section is reduced in thiclmess, and fits the brdinary oidset in the mold board. p

The use of this portion of reduced thickness results in making the section easier to handle and saves considerable material over what would be required if the section was of the same thickness throughout.

This section not only possesses the structural advantages pointed out rolled at a single operation by passing a billet of the required dimensions between suitable rolls.

ll claim as my invention:

1. A scraper blade cutting section formed integrally and comprising a lower portion having a flat wearing surface of substantial area adapted to rest, the road surface, with a cutting edge at the trout oi the wearing surface, an upwardly extending plate portion of reducedHthickness having its forward surface forming with the forward surface of the lower portion an unobstructed curved fac' over which material may freely pass, and t e rear surface of the upper portion providing an oil'- set with the rear surface of the lower portion, the whole forming a structure capable of being produced at a single operation by passing a billet of requisite dimensions between suitable rolls.

2, A scraper blade cutting section formed integrally and comprising a lower portion having aflat wearing surface of substantial adapted to rest, when in use, upon the road surface, with a cutting edge at the front but it may be when in use, upon of the wearing surface, an upwardly extendrear surface of the lower portion, and adapting plate portion of reduced thickness having said section to be firmly secured to the ing its forward surface forming with the lower'edge of a mold board. 19 forward surface of the lower portion an un- In Witness whereof, I have hereunto set obstructed curved face over which material my hand this 9th day of July 1926! may freely pass, and the rear surface of the 7. upper portion providing an offset with the CARL O. WOLD.

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