US1721266A - Abrading tool - Google Patents

Description

C. J. ANDERSON ABRADI 'rooL July 16,, 1929.

Filed March 23, 1927 Patented July 16, 1929.

UNITE CARL J. ANDERSON, OF CHICAGO, ILLINOIS, ASSIGNOB, OF FIFTY-ONE AND TWO- I THIRDS PER CENT TO ERIK BORG, AND FIFTEEN PER CENT TO CARL U. JOHAN- SON, BOTH OF CHICAGO, ILLINOIS.

ABRADING TOOL.

Application filed March 23, 1927. Serial No. 177,812.

My invention relates generally to the class of tools used to abrade the surfaces of butchers blocks, floors, or other surfaces to produce a smooth clean surface.

More particularly it relates to rotary tools of this class in which the abrading elements or blades are of spring steel.

Tools of this class have heretofore been impracticable and unsatisfactory because the supports for the blades were such that the blades were easily broken. It is therefore the object of my invention to provide a tool of the above character with new and im proved means for supporting the blades so as to make the tool both durable and rugged.

Other objects and advantages will be ap parent from the following description and the accompanying drawings, in which;

Figure 1 is an end elevation of a rotary abrading element embodying the features of my invention.

Fig. 2 is a longitudinal section of the tool taken along line 2-2 of Fig. 1.

Fig. 3 is an elevation of one of the blade supporting members, as viewed from the left in Fig. 2.

Fig. 4 is a fragmentary sectional view of the tool taken along line 4-4 of Fig. 1.

lVhile the invention is susceptible of va-' rious modifications and alternative constructions, 1 have shown in the drawings and will herein describe in detail the preferred embodiment, but it is to be understood that I do not thereby intend'to limit the invention to the specific form disclosed, but intend to cover all modifications and alternative constructions falling within the spirit and scope of the invention as expressed in the appended claims.

Referring more specifically to the drawings, my improved tool in its preferred embodiment is made up of a plurality of similar elements 7 assembled to provide a rotary tool of the desired length. The elements '7 which make up the tool preferably are held rigidly together between two end plates 9 by means of a plurality of tie rods 8. In use, the tool is mounted on a shaft 6 for rotation therewith, and is adapted to be held against longitudinal movement thereon by any preferred means (not shown).

Each element 7 of the tool comprises generally a main supporting member 10, a plurality of blades 11 projecting radially therefrom, and spring means for supporting or stiffening each of the blades 11.

The supporting member 10 is disk-shaped and has a central aperture 13 adapted to fit closely about the shaft 6. Preferably the member 10 is formed out of sheet metal by suitable cutting and stamping processes.

The blades 11 are long rectangular strips of fiat spring steel and are supported in spaced relation on one side of the disk 10, and preferably are positioned to lie substantially in a plane passing through the axis of the disk. Each blade 10 extends from the edge of the central aperture 13 to a point a substantial distance beyond the outer peripheral edge of the disk 10.

Preferably each blade 10 is held. in place and reenforced by a pair of stiffening leaf or bow springs 12. These springs are positioned atopposite sides of the blade 11 so that the ends of the springs engage the blades, and are held yieldingly against the same by suitable lugs 14 which abut the springs intermediate their ends. The length of the springs 12 is such that they abut the blade 11 at their inner ends near the central aperture 13, and at their outer ends at a point intermediate the outer peripheral edge of the disk 10 and the outer end of the blade. Thus, the outer ends of the springs will serve to stiffen the blade.

The lugs 14 are formed so as to project laterally from one. side of. the disk 10 and are positioned so as to comprise an annular series, lying between an outer peripheral flange 10' and an inner flange 10 formed on the disk 10. The lugs .14 are closely,

spaced so as to form radial slots or notches 14 between adjacent lugs 14, these notches 14 being adapted to receive the leaf springs 12 which support the blades 11. Although the lugs 14 may be formed in any desired manner, I prefer to form them by stamping and drawing radial segments from the plane of the disk so that they'project in the form of U-shaped loops from one side of the disk 10. These loops, which form the lugs 14 are preferably of a substantial dimension radially so as to form a wide contact with the leaf springs 12, and thereby hold the same firmly in position.

To provide means to hold the blades 11 and the leaf springs 12 against radial dis placement, an annular bead 15 is formed in blades,

the inner flange 1O on the same side of the disk as the lugs 14. This bead 15 is adapted to fit into notches 16 formed in the sides of the blades 11 and springs 12.

Taking one element- 7 individually, the blades 11 and springs 12 may be easily forced from between the lugs 14;. In the completed tool, however, means is provided to draw the adjacent elements 7 tightly together so that the edges of the blades and springs between any two disks 10 will abut the flanges 10 and 10 of said disks 10, and will thereby be held. between the lugs, 14 and in engagement with the annular head 15. The means for holding the elements 7 axially together preferably comprises the two centrally ap ertured plates 9 which are placed at the ends of the elements 7 making up the tool, and the tie rods 8 which pass through apertures 17 in the disks 10 and plates 9 and are riveted at their ends.

Although any preferred means may be employed to secure my completed tool upon the shaft, I provide keys 18 on each disk and plate which are adapted to it into a keyway 19 provided in the shaft 6.

It will be apparent that my improved tool provides a novel supporting and stiffening means for the abrading blades thereofwhich will make the tool both durable and rugged.

I claim as my invention:

1. A rotary abrading tool comprising a plurality of sheet metal disks placed side by side, each of said disks having an annular series of lugs formed thereon projecting laterally from one side thereof in circumferentially spaced relation so as to form radial notches therebetween and having an annular bead projecting laterally of said disk, a plurality of blades, one in each of said notches, said blades extending bey nd the outer peripheral edge of said disk, a pair of opposed leaf springs in each of said notches adapted to hold the blade therein, notches formed in the sides of said blades and said springs, said notches fitting over said annular bead to prevent radial movement of said blades and springs, the adjacent disks cooperating to hold said springs and blades within said notches and inengagement with said annular bead, two plates, one at each end of said tool, and a plurality of tie rods extending through said plates and said disks to hold the same in assembled relation.

2. A rotary abrading tool comprising a plurality of disks placed side by side, each of said disks having an annular series of lugs formed thereon projecting laterally from one side thereof in cireun'iferentially spaced relation so as to form radial notches therebetween and an annular bead projecting laterally of said disk, a plurality of one in each of said notches, said blades extending beyond the outer peripheral edges of said disks, a pair of opposed bow springs in each of said notches engaging opposite sides of the blade therein, said blades projecting beyond said springs so that said springs stifi'en said blades, notches formed in the sides of said blades and said springs adapted to fit over said annular bead to prevent radial movement of said blades and springs, the adjacent disks cooperating to hold said springs and blades within said notches and in engagement with said annular bead, and means operable to hold said disks in assembled relation.

3.. A rotary abrading toolcomprising a plurality of supports positioned side by side, each of said supports having an annular series of closely spaced lugs projecting laterally therefrom, an annular bead formed in each support, a plurality of blades positioned between said lugs and extending out from peripheral edges of said supports, a pair of bow springs engaging the opposite sides of, each blade to stiffen the latter, notches formed in said blades and said springs fitting over said annular bead, the adjacent supports cooperating to hold said springs and blades betweens said lugs and in engagement with said annular bead, and means operable to hold said supports in assembled relation.

l. A rotary abrading tool comprising a plurality of plates mounted side by side in spaced relation, each of said plates having a series of closely spaced lateral projections in circumferentially spaced relation, a plurality of cutting elements positioned in the spaces between said projections, said elements extending out from said plates, spring means for holding each element in position, the adjacent plates cooperating to hold said spring means and said elements between said projections, and means operable to hold said plates in assembled relation.

5. A rotary abrading tool comprising a plurality of disks positioned side by side, each of said disks being formed with a se ries of lateral projections on one side thereof in spaced relation so as to form notches therebetween, a plurality of spring blades, one in each of said notches, said blades eX- tending out from said disks, means for reinforcing said spring blades, means for holding said blades against outward displacement, the adjacent disks serving to hold said blades laterally within said notches, and means for holding said disks in assembled relation.

6 In a rotary abrading tool, in combination, a blade support having an annular series of blade receiving spaces, a plurality of spring blades one in each space, and bow springs, two for each blade, engaging opposite sides thereof and the side of the corresponding space in such a manner as to be flexed by circumferential bending of the blade, said springs serving to hold said blades in substantially radial position and to stiffen said blades, and means to prevent radial movement of said blades.

7. In a rotary abrading tool a disk-shaped central support adapted to be formed from sheet metal and having a central aperture, an annular series of spaced projections on one side defining a plurality of blade receiving spaces, a plurality of blades, one in each space, said blades projecting outwardly beyond the periphery of said disk, spring means coacting With the sides of said projections to engage said blades, and means for holding said blades against longitudinal displacement.

8. In a rotary abrading tool, in combiner tion, a shaft, ablade support on said shaft having an annular series ofblade receiving spaces, a plurality of spring blades one in each space, each of said blades having a notch formed in its side, means projecting axially of the support into said notches, and means preventing separation of the blades and the support axially of the shaft.

In testimony whereof, I have hereunto affixed my signature.

CARL J. ANDERSON.

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