US2095379A - Device for polishing and abrading - Google Patents

Description

Oct. 1 GONE-Y v y DEVICE FOR POLISHING AND ABRADING Original Filed April 5, 1954 1N VENTOR.

www? Patented Oct. 12, 1937 UNI-TED sT 'rss PATEKT OFFICE DEVICE ron rorismivc AND ABRADING W. Anderson Reiiled for abandoned application Serial No.

719,077, April 5, 1934. This application Janua/ly 28, 1937, Serial N0. 122,883

2 Claims.

This invention relates to a device for polishing or abrading or similarly smoothing down or treating surfaces.

One of the objects of the invention is to provide a device of this character of simple and compact-construction, one whichmay be .readily and economically manufacturedV from materials and by. means of facilities ordinarily available and yet have the capacity of materially facilitating abrading, polishing or smoothing down operations. Usually, such operations are, hard, slow and laborious, but with the present invention the necessity of eXpending any substantial amountof effort or labor is eliminated and the desired action is not only speeded up but is so eiciently carried out that materially improved results are had.

Another advantage of the vpresent invention resides in the capability of the device to work efficiently in crowded quarters or on irregular or curved surfaces and this without danger of injurng or marring the object operated upon.

A further object of the invention resides in the provision of a device of'this character and havhad to the accompanying drawing forming a part Y of this specification, and in which:-

`Figure 1 isa fragmentary View in elevation showing the device set up for a polishing oper-v ation; y Y

Figure 2 is a view similar to Figure l but showing the device equipped for abrading;

Figure 3 is a fragmentary view in longitudinal vertical cross Section further illustrating the construction of the device;

Figures 4 and 5 are views in transverse cross section taken on lines 4 4 and 5 5, respectively, of Figure 3;

Figure 6 is a view in end elevation looking toward the open end of the device;

Figure 7 is a similar view but showing how the periphery of the device attens down in polishing or abrading one type of surface; and

Figure 8 is a detail perspective view showing the shape of the polishing or abrading elements employed with the device.

Referring to the drawing, it will be seen` that Y the polishing and abrading device embodying the ing these advantages and capacities and which is present invention is designated generally at l and is carried at one end of a flexible shaft designated generally at 2 and driven in any suitable way, for example, from a motor` or the like (not shown) which may be sufciently light to be carried by the operator.

The device I has a hollow frusto-conically shaped body or shell 3v which may be constituted of rubber or` other suitable material. Preferably', the thickness of the body 3 decreases from its inner small end l to its outer open endV 5. The small end i of the shell 3 is mounted on and driven from rotatable element of the flexible shaft 2. Y

The mounting and driving connection between the exible shaft 2 and the device l preferably comprises a frusto-conically shaped metal cup 6 having an apertured end wall 'l through which a stud 8 constituting an extension of the rotatable element of the flexible shaft projects. Within the cup 6 a correspondingly shaped flanged nut 9 is disposed, the nut 9 being threaded on the stud 8 and clamping the cup 6 in position on the end of the flexible shaft. The sleeve-like body of the nut 9 is somewhat elongated and is open at both ends, one end engaging the stud 3 as just described and the other end receiving the threaded shank of a headed stud l0. The head of thel stud lll bears against a washer Il, which, in turn, engages the shoulder I2 of an inner clamping member i3. The sleeve-like body lli of this inner clamping member is slidably tted over the similarly shaped body portion of the nut il, whereas the enlarged 'or flared end of this clamping member bears against the inside of the small end of the shell 3. Keying openings I5 may be provided in this clamping member and. similar openings IE are formed inthe cup 6;

On the outside of the shell 3, a polishing or abrading covering or element is supported. Thus, as shown in Figures 1 and 3, a` layer of canvasv 20 may be placed against the outer surface of the shell 3 and covered by a polishing cloth 2|. Preferably, the canvas `and polishing cloth are cone-like in shape and extend beyond the outer end of the shell 3. The outer edge portion of the polishing cloth designated at 22 may be turned back under the canvas layer and stitched thereto. The inner edge portions of the polishing cloth and of the canvas layer are firmly clamped against the inner end portion of the shell by the coaction of the cup 5 and clamping member i3, these parts acting when the headed stud I0 is tightened up to Vhold the canvas 20 and polishing cloth 2| in position as well as to properly mount the shell 3 and afford the desirable driving connection between the entire abrading or polishing device and its drive shaft. If, instead of polishing, abrasive work is to be done the can- 5 vas 20 and polishing cloth 2l may be replaced by a correspondingly formed cone-like element 25 of sandpaper, emery cloth, or the like. polishing or smoothing down, any suitable material may be employed, for example, sheep Wool, flannel, or felt.

In operation, the outer surface of the device is applied directly to the work and the device being rapidly rotated will flatten out against the work in the manner indicated in Figure 7. In use, the operator grasps the stationary sheath or casing 2 of the flexible shaft and utilizes such as a handle. In this way' surface contact over a substantial area is had, and thus the polishing or abrading action is speeded up with the consequence that less time is required to do any particularjob. The portion of the device applied to the Work is sufficiently flexible and is free of all metal parts likely to mar or scar the work. This is due to the fact that the fastening means which connects the device to the flexible driving shaft is confined to the smaller end of the shell and the fact that the shell extends axially outward from its connection with the shaft a considerable distance as compared to the relatively thin Wall which closes the'inner or smaller end of the shell where the connection is made. Also the shell is relatively light in weight for ease of portability with the shaft and is constructed of a flexible material which not only readily flexes when the shell is pressed against the work, but will return the shell to its normal shape when released from the Work. With the connecting means confined to the smaller end of the shell as permitted by its relatively thin end wall, the greater portion of the shell extends axially forward of the shaft and the connecting means, and is available for use in the application of the shell to the work. The freedom and flexibility which the outer operative end portion of the device possesses enables the polishing or abrading action to be carried out Conveniently and eliiciently in crowded quarters. This same structural characteristic renders the device susceptible of easy control and manipulation.

While there has been shown and described one construction in which the invention may be advantageously embodied, it is to be understood that this construction has been selected merely for the purpose of illustration or example, and'that vari- 55 ous changes in thesize, shape and arrangementA For 'I'he invention claimed is:

1. A device of the character described, comprising a drive shaft, a substantially frusto-eonically shaped hollow shell of resilient material having its larger end open and its smaller end closed by an end wall, means for securing the shell at its small end to the shaft for rotation thereby, said securing means comprising a cup-shaped element fitting about and engaged with the small end of the shell, a pair of clamping members, one

secured to the'shaft within the cup-shaped element for attaching the latter to the shaft, and the other clamping member being located Within the shell against its end Wall and having a tubular portion extending toward the shaft through an opening in said end wall, the rst named clamping member having a sleeve extending into the tubular portion of the other clamping member beyond said shaft, and a fastening element extending into the sleeve from the clamping member in the shell, said fastening element cooperating with the sleeve for clamping the shell between the clamping members and the inside clamping member against the end wall of the shell, and a layer of surfacing material on the outside of the shell'and secured to the shell at its small end through the cup-shaped element.

2. A device of the character described, comprising a drive shaft having a shoulder adjacent its inner end, a substantially frusto-conically shaped hollow shell of resilient material having its larger end open and its smaller end closed by an end wall, means for securing the shell at its small end to the said shaft for rotation'thereby, said securing means comprising a cup-shaped element fitting about and engaged with the small end of the shell, a pair of clamping members, one having a screw threaded connection with the shaft within the cup-shaped element for clamping the latter against said shoulder, the other clamping member tting within the shell against its end wall and having a tubular portion extending toward the shaft through an opening in said end wall, said first-named clamping member having a sleeve extending into the tubular portion of the other clamping member beyond said shaft, and a fastening element extending into the sleeve through the clamping member in the shell, said fastener having screw-threaded connection at one end with the sleeve beyond the shaft and bearing at its opposite end against the clamping member in the shell for clamping said clamping member in the shell and the shell in the cup-shaped element, and a layer of surfacing material on the outside of the shell and secured thereto at its smallV end.

. HERTHA CONEY, Administratrice of the Estate of John Coney, De'- ceased.

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