US3500562A - Tooth arrangement for alternate digging and scooping - Google Patents

Description

March 17, 1970 R. B. REINHARD 3,500,562

TOOTH ARRANGEMENT FOR ALTERNATE DIGGING AND SCOOPING Filed April 28, 1967 36 36 /Z ff f2 2,@ 22 2@ fe f2 2,@ if f2 f4/Pf6. .9.94 4

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3,500,562 TOOTH ARRANGEMENT FOR ALTERNATE DIGGING AND SCOOPING Richard B. Reinhard, 1291 Georgesville Road,

' Columbus, Ohio 43228 Filed Apr. 28, 1967, Ser. No. 634,684 Int. Cl. E02f 9/28 U.S. Cl. 37-141 4 Claims ABSTRACT oF THE DISCLOSURE A combination scooper and digger blade for earth moving equipment comprising a base blade having a beveled forward edge; spacer blocks mounted on said blade and having forward edges complementary to said blade edge; members slidably mounted on said blade between said blocks, each of said members having one end beveled to complement the bevel/,of said blade and spacer blocks and the other end being sized and shaped to project forwardly beyond the edge of said blade, and means to secure said members with either end in forward position.

This invention relates to an improved adjustable cutting edge for loading buckets such as are mounted on and operated by tractors.

Specifically, this invention constitutes an improvement upon similar structures shown in Patent 2,824,392, dated Feb. 25, 1958, and Patent 2,828,558, issued Apr. 1, 1958.

The patents aforesaid show a bucket which may be used either to scoop or to dig. In scooping, the bucket is attacking already loosened material such as dirt, sand, gravel or snow. In digging, however, the activeedge of the bucket'itself penetrates and loosens the earth to be scooped up in the bucket and for this latter purpose, the cutting edge should have spaced projecting teeth, whereas in scooping the bucket needs only a plain beveled edge. In said patents, the bucket presents a plane beveled edge for scooping purposes, but spaced along the edge are slidable members which when desired can be advanced forward of the main edge to provide digging teeth. The present invention operates along the same general lines except that each slidable member has a scooping edge at one end designed to lie ush with the active surface of the main blade, and an enlarged tooth at the other end designed so that when reversed relative to the member may present a protuberant digging tooth.

It is an object of this invention to provide an adjustable blade as aforesaid which will be cheap to manufacture, easy to operate, and in which opposite ends are used for the two separate purposes so that when the members are aligned with the blade for scooping operations, the wear is just the same on both blade and members, and when used for digging operations, a primary wear, which is encountered by the projecting member ends, is concentrated on those ends so that there is no tendency to overwear the members as distinct from the blades.

The above and other objects will be made clear from the following detailed description taken in accordance with the annexed drawing, in which:

FIGURE l is a perspective view, partially in section and partially disassembled, showing the blade in relationship to the bucket;

FIGURE 2 is a section on the line 2-2 of FIGURE l;

FIGURE 3 is a rear elevation partly in section, taken on the line 3-3 of FIGURE 2;

FIGURE 4 is a view similar to FIGURE 3, taken from the right hand side of FIGURE 2, and looking in the opposite direction;

FIGURE 5 is a perspective view from the underside of one of the slidable adjustable members; and

United States Patent O ICC FIGURE 6 is a section similar to FIGURE 2, showing the slidable member reversed from the position of FIG- URE 2.

In FIGURE 1, the member 10 indicates generally a bucket of the type mounted and operated on and by a tractor, said bucket having a bottom 12 and sidewalls 14 with the bottom 12 terminating in a beveled front edge 16. The main blade 18 is coextensive in length with the beveled edge 16 of the oorm12, The blade 18 underlies the floor 12 and is spaced therefrom by a series of spacing blocks 20 which not only Vsepara-.te the blade 18 from the floor 12 but are themselves spaced lengthwise of the blade 18 to receive slidable reversible members 22. In practice, the blade 18 and the spacers 20 are secured to the oor 12 by means of rivets 24, at which time the blade 18 and the spacer members 20 define a series of spaced channels, each receiving a tooth member 22.

The blade 18 has a continuous forward beveled edge 26 and each of the spacer blocks 20 has a forward beveled edge 28 so that, as shown in FIGURE 1, the s pacer blocks 20 and the blade 18v present a continuous forward beveled surface which merges with the beveled edge 16 of the bottom 12.

Each of the members 22 has at one end a digging edge 30 and at the opposite end a scooping edge 32. As a matter of angularity, these edges are precisely the same as the edges 26, 28 and 16.

Along the rear edge of the blade 18 there are formed a series of rearwardly directed projections 34 which terminate in upstanding lugs 36 extending above the upper surface of the blade 18. The height of extension of the lugs is precisely that of the members 22 and the inner confronting surfaces of the lugs 36 have inwardly directed bevels 38 which mate with the sides 40 of the members 22, as best seen in FIGURE 3. The spacer members 20 have their side edges similarly beveled to engage the edges 40 of the members 22, as best seen in FIGURE 4. As best shown at 42 in FIGURE l, the rear edge of the spacer members 20 abut against the lugs 36.

In FIGURES 1 and 2, the members 22 are in the di-gging position with the edges 30 of the members 22 in the active forward position. They are secured in this position by pins 44 which pass through apertures 46 in the lugs 36 and occupy hemispherical grooves 48 formed in the members 22 and in mating grooves formed in the projections 34. When the pins 44 are withdrawn, the members 22 may be slid forward and removed from the blade 18 and members 20. They are then reversed and their digging edges 32 are introduced at the rear of FIGURE 1 and are slid forward until the edges 32 register with the edges 2 6, 28 and 16, at which point the pins 44 are reinserted to maintain the structure in scooping condition and this is illustrated in FIGURE 6.

It will be clear vfrom the foregoing that during scooping operations with the parts, as shown in FIGURE 6, the edges 32 wear equally with the edges 26, 28 and 16. When the parts are reversed to the position of FIGURES l and 2, primary wear occurs on the edges 30 which lbear the brunt of breaking the soil or whatever material is being dug into. The net effect is vastly to increase the life of the members 22. The structure as a whole has been simplified and its cost reduced as against the structures shown in the above-mentioned patents on which the present invention constitutes an improvement.

By preliminary placing of a few short rivets 24, the blade 18, spacers 20 and members 22 may be preassembled and shipped as a unit ready for application to a bucket 10.

While in order properly to describe the invention, reference has been had to certain particular details of construction, these may 'be susceptible of changes by those skilled in the art. It is not intended, therefore, to limitthis in-v vention to the precise details disclosed herein, but 'only as set forth in the subjoined claims.

What is claimed is:

1. For use in conjunction with a bucket adapted to be mounted on and operated by a tractor, a blade assembly comprising: a blade having an elongated, continuous beveled forward edge and spaced pairs of upstanding lugs along its rearward edge; spacer members along the upper' side of said blade defining, with the lugs of each pair, spaced, .parallel channels transverse said blade, said spacer members havingbeveled forward edges complementary to the beveled edge of said blade; tooth members spaced along said continuous beveled forward edge slideable in said channels and occupying the lspace Ibetween said spacer members, said blade and the bottom of said bucket, each of said tooth members having one end beveled to form' a continuation of the bevel of said blade, the other end of cach tooth member being extended downwardly to cover and conform `to the bevel of said blade, each tooth member being reversible so that either of said ends may be placed in a forwardly extending working position, and means for holding vsaid tooth members in xed position with either end forward.

` 2. An assembly as set forth in claim 1, in which said holding means comprise pins penetrating said tooth lugs and said members.

3. An assembly as set forth in claim 1, in which the walls of said channels interengage with the side walls of said tooth members to guide the same and to restrain the same against vertical movement.

4. An assembly as set forth in claim 1, in which said spacer members abut against said lugs.

References Cited UNITED STATES PATENTS 1,769,998 7/1930 Jenkins 37--141 1,918,169 7/1933 Arndt 37-142 2,824,392 2/1958 Reinhard 37-141 2,828,5584 4/1958 Reinhard 37-141 l EDGAR S. BURR, Primary Examiner` U.S. Cl. X.R.

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