US1916354A - Digging bucket - Google Patents

Description

H. H. BARBER DIGGING BUCKET July 4, 1933.

Filed June 25, 1931 "m bucket.

Patented July 4, 1933 UNITED STATES PATENT oF Ica HARRY I-I. BARBER, OF AURORA, ILLINOIS, ASSIGNOR TO BARBER-GREENE COMPANY,

v01E AURORA, ILLINOIS, A CORPORATION OF ILLINOIS reamer BUCKET Application filed June 25,

This invention relates to a digging bucket for ditching machines and concerns itself more particularlywith the cutting elements and the manner of securing the same to the The cutting elements for such buckets are usually made of some expensive material that will maintain a good cuttingedge for a reasonabletime beforethey have to be replaced.

In the past these cutting elements have been subjected'to considerable bending strains that frequently distorted the same. Moreover,

considerable diliiculty has been encountered in replacing the cutting elements.

It is an object of this invention to overcome I the above noted objections in the provision of less expensive cutting elements that may be more readily and frequently replaced, and

that eliminate to a great eXtentthe previous 10 tendency to bend, and wherein the cutting force results mainly in a compression action.

The invention comprises the novel structure and combination of parts hereinafter de 1 scribed and more particularly pointed out and defined in the appended claims.

In the accompanying drawing which illustrates a preferred form of this invention and in which similar reference numerals refer to similar features in the different views:

Figure 1 is a top plan view of a digging bucket equipped with cutting elements involving this invention;

Figure 2 is an enlarged top plan view of one of the cutting elements Figure 3 is a sectional view taken upon the line III-III of Figure 1 looking in the direction of the arrows; and

Figure 4 is an enlarged sectional view taken upon theline IV.IV of Figure 2 looking in the direction of the arrows.

Describing the invention in relation to the drawing, there has been illustrated a digging bucket 1 provided with a series of cutting elements 2. Each cutting element has a base provided with a slot 5 extending inwardly from the rear edge, and the base portion upon each side 'of the slot is provided with a rib 3 having upwardly diverging sides that terminate in a horizontal shoulder 4. The cutting or digging portion 2'?) rises from the 1931 Serial No. 546,847.

forward portion and sides of the base. The inclined cutting portion 2?) is relatively thin in section to present a relatively sharp cutting or digging edge as it is worn. Theslope of the cutting portion 2?) is such that as it wears its projection beyond the front edge of the bucket does not decrease in direct proportion to the wear. The interior sides of the cutting portion or tooth are bevelled as indicated at 6, while the front part of the tooth inclines forwardly from a point mid way of its height as indicated at 2a. The corners that join the sides with the cutting portion 26 are thicker than the cutting portion 26 with the result that they wear down slower and may form a double pick pointed tooth. Due to the construction of the tooth,

it will be obvious that the major portion of the force exerted thereon will be of a com-.

pressive nature and very little bending force will occur. This compressive force will readily be transmitted to a relatively broad supporting base 7 upon the bucket.

For it will be appreciated that the bevelled portions 6 of the sides slope downwa'rdangular rib portion 3 of each tooth and centering such tooth and fiat portions adjacent said groove for sustaining the shoulders 4 on the tooth. These base portions are provided with apertures for receiving bolts 9 whichextend through the slots 5 and which are provided with sufiiciently large polygonal heads 10 for overlapping the walls of the slots. It will be noted that the head of each bolt fits between the side walls and against the front wall of the tooth which forms a recess for receiving a portion of each bolt head and prevents rotation thereof, and that the longitudinal axis of the bolt lies substantially parallel to the line of thrust on the tooth. In order to remove a tooth, it is only necessary to loosen its bolt when the tooth may be slid out.

I am aware that many changes may be made and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted hereon otherwise than necessitated by the prior art.

I claim as my invention:

1. A cutting tooth for a digging bucket saving a base portion provided with a centering projection and shoulders adjacent the sides of said projection, said base portion merging in upwardly extending bevelled side walls connect-ed by a forwardly inclined front wall, the construction being such that the cutting action transmits mostly a compressive force with respect to the base.

2. A cutting tooth for a digging bucket having a base portion with a centering rib .and bearing portions adjacent the sides of the rib, said base merging into side walls having inwardly inclined bevelled portions and a front wall having an upper forwardly sloping portion.

3. A cutting tooth for a digging bucket having a supporting base provided with a bevelled centering rib and bearing portions adjacent the sides of said rib, said base having a bolt securing aperture, said base merging in side walls having interior sloping portions and a forwardly sloping front'wall.

4. A cutting tooth for digging buckets comprising a base portion, a front wall of substantially uniform thickness extending upwardly from the forward portion of the base and terminating in a cutting edge, and taperingside portions extending upwardly from the sides of the base and inclined toward the cutting edge and adapted to reinforce and support the front wall and form bolt having a head and the walls of said tooth forming a recess for receiving said head and preventing rotation thereof, the longitudinal axis of saidbolt lying substantially parallelto the line of thrust on said tooth.

6. In a digging bucket having a tooth support, a tooth having a base resting upon said support, said base having a front wall forwardly inclined and terminating in a cutting edge, and tapering side walls merging with said front wall, said side walls and front wall forming a recess, said support and base having an aperture and a bolt having its head located in said recess and extending through said aperture and lying substantially parallel to the line of thrust upon said cutting edge.

7. A tooth for digging buckets, comprising a base having an upwardly extending and forwardly inclined front wall terminating in a cutting edge, and side walls tapering in thickness and width from said base and merging with said front wall, said side walls and front wall forming a recess adapted for receiving thehead of an attaching bolt Illinois.

HARRY H. BARBER.

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