US2257061A - Sanding wheel head - Google Patents

Description

Sept. 23, 1941. F H, M RRIS 2,257,061

SANDING WHEEL HEAD Filed Sept. 23, 1938 2 Sheets-Sheet 1 IN V EN TOR.

A TTQRNEYS.

Sept. 23, 1941. I F H MQRRIS 2,257,061

SANDING WHEEL HEAD Filed Sept. 25, 1938 2 Sheets-Sheet 2 14 5555 5 l I 1 A 7 4 I i9 6 16 I EZZMOFPLS INVENTOR. I I 7 j i BY ATTORNEYS.

Patented Sept. 23, 1941 UNHTED STATES P OFFICE SANDING WHEEL HEAD Fred H. Morris, High Point, N. 0., assignor to Pearson Sanding Machine Company, High Point, N. C.

11 Claims.

This invention relates to sanding wheel heads, the primary object of the invention being to provide a sanding wheel head including a continuous circular rubber cushion, constructed in such a way that portions of the cushion interlock with the central portion or core of the sanding wheel head with the result that movement of the cushion with respect to the core of the head will be prevented An important object of the invention is to provide a sanding wheel head wherein the hub and core are provided with recesses adapted to receive extensions of the cushioning member the extensions having openings for the reception of securing bolts for securing the sections together, the construction of the cushioning member being such as to insure against the cushioning member becoming loose from the hub of the sanding wheel head, when the sanding wheel head is in operation. l

Another object of the invention is to provide means for securing the sanding cloth to the I cushioning member of the sanding wheel head,

the securing means holding the cloth in such a way to insure against the cloth creeping or slipping over the periphery of the cushioning member.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein described, may be made within the scope of what is claimed,

.without departing from the spirit of the invention.

Referring to the drawings:

Figure 1 is an elevational View of a sanding wheel head constructed in accordance with the invention.

Figure 2 is a sectional view taken on line 2.2 of Figure 1.

Figure 3 is a side elevational View of a sanding wheel head one of the side plates thereof having been removed.

Figure 4 is a side elevational view of the hub or core of the sanding wheel head.

Figure 5 is a sectional view taken on line 55 of Figure 1.

Referring to the drawings in detail, the hub or core of the wheel is indicated generally by the reference character 5, the hub or core being constructed preferably of metal to lend Weight to the 5 is formed with an inwardly extended flange 6 which is provided with inwardly extended ofisets 1, defining a plurality of supporting surfaces 8. The hub or core also includes a disk 9 which is positioned against the edge of the flange 6, to secure the cushioning member, to be hereinafter more fully described, in position on the hub or core.

The cushioning member is indicated by the reference character l0 and is constructed preferably of rubber material, the cushioning member being formed with extensions I l of a construction to fit within the offset members of the flange 6, providing an interlocking structure for securing the cushioning member I0 to the hub or core 5. Extending inwardly from the periphery of the cushioning member, and disposed at points directly opposite to the olfsets T, are slots, which are designed for the reception of the sanding cloth, which is indicated by thereference character l3.

' Bolts indicated by the reference character i i, extend through aligning openings in the hub or core 5, disk 9 and cushioning member ID, securing the various sections of the sanding wheel head together.

On positioning the sanding cloth l3, the sandingcloth is placed against the periphery of the cushioning member I", and portions of the sand- .ing cloth are extended into the slots l2, providing loops I5, so that when the bolts 14 are positioned, they will engage the loops of the sanding cloth I3, securing the sanding cloth in position against slippage while in use. The bolts used in securing the free ends of the sanding cloth to the wheel, are of split formation, one of the bolts being shown in section in Figure 5 of the drawings. The split bolt which is indicated by the reference character I6, is hollow, and when this bolt is positioned,within the inner end of the slot of the cushioning member to secure the sanding cloth, the bolt I1 is forced into the hollow bolt l6, causing the side walls of the split bolt IE to expand into close engagement with the sanding cloth and the cushioning member.

Thus it will be seen that due to this construction, the ends of the sanding cloth which are shown as looped around the split bolt I5, will be securely held in position.

The securing bolt shown by Figure 5 of the drawings, includes a threaded head portion [8 formed with a screw driver slot !9, whereby the split bolt may be positioned in the threaded opening of the head or core of the sanding Wheel sanding wheel head. As shown, the core or hub head.

7 ing wheel head disks together.

The shaft on which the sanding wheel head is supported, is indicated by the reference character 20, one end of the shaft being threaded to receive the nut 21 to further secure the sand- It wil1 be seen by observing Figure 2 of the drawings, one side of the hub or core is forced against the shoulder 22 of the shaft 25!.

From the foregoing it will be seen that due to the construction shown and described, I have provided a sanding wheel including a hub or core section and a cushioning member over which the sanding cloth is positioned, the hub or core and cushioning member, being provided with means whereby they may be interlocked and secured together against movement with respect to each other.

Iclaim:

1. In a sanding wheel head, a disk, a flange extending from one surface of the disk in spaced relation with the periphery thereof and having curved inwardly disposed offset portions, a circular cushioning member, inwardly disposed extensions formed on the cushioning member, said cushioning member being fitted over the flange, the extensions of the cushioning member being fitted in the offsets of the flange, said cushioning member having slots formed therein, extending inwardly from the periphery thereof and terminating within the offset portions, said slots adapted to receivea strip of sanding cloth positioned over the cushioning member, said cushioning member being of a thickness equal to the width of the flange, a second disk adapted to be positioned against said flange and cushioningmember, holding said cushioning member to the flange, and bolts disposed within the oil-set portions of the flange and resting within the openings of the offset portions of the cushioning memtioned disk clamping the'cushioning member between said disks.

2. In a sanding wheel head, a disk, a flange extending from one side of the disk and spaced from the periphery of the disk, said flange having offsets, a cushioning member constructed of rubber materialpositioned on the flange, extensions on the cushioning member and fitted within the offsets, slots in said extensions, a second disk fitted against the flange and cushioning memben f bolts extending through the disk and extensions on the cushioning member holding a sanding cushioning member fitted on the flange, exten 5 sions 'on'the cushioning member, said extensions adapted 'to'fit within the 'ofisets, said cushioning member having slots extending inwardly from the elastic circumferentially continuous wheel rim surrounding said body, the inner periphery of said circumferentially continuous rim being provided with integral lugs received in said grooves, said circumferentially continuous rim being provided with narrow substantially radial grooves which open through the outer periphery and the side faces thereof but not through the inner periphery thereof, said radial grooves extending into said lugs, to decrease the tensile strength of said lugs and allow them to stretch when centrifugal force acts on said rim, an abrasive or other strip surrounding said circumferentially continuous rim and having loops received in said radial grooves, and means disposed externally of said body, extending through said loops and holding the inner ends of said loops in the closed inner ends of said radial grooves.

5. A device of the class described comprising a wheel body, and flanges at the ends of said body projecting beyond the periphery thereof, at least one of said flanges being removable from said body'in a direction extending axially of the wheel, an elastic circumferentially continuous wheel rim surrounding said body between said flanges and movable axially therefrom when said one of said flanges is removed, said circumferentially continuous rim having circumferentially spaced transverse grooves in its outer periphery and being provided on its inner periphery with integral lugs into which said grooves extend,

the portions of said grooves which extend into said lugs serving to decrease the tensile strength of said lugs, allowing them to stretch when centrifugal force acts on the rim, the outer periphery of said body being provided with lugs between and contacting with said rim lugs, an abrasive or other strip surrounding said rim and ber, said bolts extending through the last mena periphery thereof and terminating within the exthe cushioning member between said disks holding the cushioning member in position.

4. A deviceof the class described comprising a rigid wheel 7 body having circumferentially spaced transverse grooves in its periphery, an

having loops extending into said grooves, and pins rigidly secured to one of said flanges, disposed externally of said body and received in said loops, said pins being parallel with the wheel axis to withdraw from said loops when said one' tensile strength of said lugs and allow them to therein, a shaft extending through the center of the flanged hub and disk, and fastening means held fixed at one end and extending through the grooves in the elastic wheel rim and into theopenings in the disk.

8. A sanding head including a flanged hub 'or core characterized by a hub having a hole through the center thereof, a circumferentially continuous cushioning member fitted in the angle between the'hub and flange, the cushioning member having radial grooves, fastening means rigidly secured to the flanged hub and extending through the inner ends of the radial grooves, a

disk having a central orifice and openings which receive the free ends of the fastening means, a shaft extending through the holes in the center of the hub and disk, and removable means on the shaft for fastening the shaft, cushioning member and disk rigidly together and the sides of the cushioning member clamped between the flanged hub and the disk.

9. A sanding head including a flanged hub, an elastic wheel rim held in the angle between the hub and the flange, its diameter being greater than that of the flange, the elastic wheel rim having radial grooves, a disk of less diameter than the diameter of the wheel rim, the disk and flanged hub having a centrally located hole, a shaft extending through the holes in the flanged hub and the disk, and fastening means secured rigidly to the flanged hub and extending through the latter and through the radial grooves in the rim and into holes in the disk, and means on the shaft for fastening the hub, disk and shaft rigidly together, and for clamping the sides of the rim between the flange and the disk.

10. A sanding head including a flanged hub with a. hole in the center of its hub, an elastic wheel rim held in the angle between the hub and the flange, the rim having radial grooves, a disk having openings therein and a hole through the center, a shaft extending through the holes in the flanged hub and disk, fastening means rigidly secured to the flanged hub and extended endwise into the radial grooves of the wheel rim and into the openings in the disk, and means extending through the holes in the hub and disk for securing the hub, rim and disk together.

11. A sanding head including a flanged hub having a central opening, an elastic wheel rim held in the angle between the hub and the flange, the rim having radial grooves, a disk having an opening through the'center, fastening means extending across from the flanged hub to the disk and through the grooves, said fastening means rigidly secured at one of their ends only and held in position at their opposite ends by one of said parts, and means extending through the holes in the hub and disk for holding the several parts of the sanding head securely together.

FRED H. MORRIS.

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