US 3410033 A
Description (OCR text may contain errors)
Nov. 12, 1968 N. v. FEHRM 3,410,033
SPINDLE FOR SUPPORTING TUBULAR DEVICES Filed Oct. 23, 1965 ATTJS.
United States Patent 3,410,033 SPINDLE FOR SUPPORTING TUBULAR DEVICES NormanV. Fehrm, Glen Ellyn, Ill., assignor to The Freeman Supply Company, Toledo, Ohio, a corporation of Ohio Filed Oct. 23, 1965, Ser. No. 502,894 3 Claims. (Cl. 51358) ABSTRACT OF THE DISCLOSURE A spindle for supporting and driving tubular sanding cylinders having a solid rod onto which the sanding cylinder is telescoped. A collar, cfixed to one end of the rod, defines an annular recess for receiving one end of the sanding cylinder. A recessed setscrew is threaded through the collar to bind the cylinder against the rod. The collar is tapered away from the rod to provide a means for supporting and rotating the spindle.
The present invention relates to spindles of the type which support tubular sleeves or devices; and more particularly to spindles for supporting sanding sleeves.
An object of the present invention is the provision of a new and improved spindle for supporting tubular sanding sleeves and the like which is simple in design,
Another object of the invention is the provision of a new and improved spindle of the above described type and onto which sanding sleeves can be telescoped and clamped into position quickly and easily.
Another object of the present invention is the provision of a new and improved spindle of the above described type whose outer end is free of obstructions that prevent the tubular sleeves from being slipped over the spindle.
A further object of the invention is the provision of a new and improved spindle of the above described type on which a sanding sleeve can be quickly and easily clamped into position, and on which there are no projections which can grab the clothing of an operator.
Further objects and advantages of the invention will become apparent to those skilled in the art to which it relates from the following description of several preferred embodiments described with reference to the accompanying drawing forming a part of this specification, and in which:
FIGURE 1 is a side view of a spindle which embodies principles of the present invention, and on which a sanding sleeve is positioned;
FIGURE 2 is a planned view of the spindle shown in FIGURE 1;
FIGURE 3 is a side view similar to FIGURE 1 but having portions broken away to better illustrate its construction;
FIGURE 4 is a side view with portions broken away similar to FIGURE 2 but showing another embodiment of the invention.
Although the spindles of the present invention have utility in many applications wherein tubular sleeves must be quickly installed over and removed from spindles, it has particular advantages when part of sanding machines since there are no projections extending radially outwardly of the free end of the tubular sleeves which can rnar Wood brought to bear against the sanding sleeve.
The sanding sleeves which are used for the production sanding of wood parts are made in various sizes each of which have internal openings of acounate predetermined sizes, so that they can be firmly supported throughout their full length. The spindles of the present invention include a cylindrically shaped rod portion that is accurately sized, so that its outside diameter has a finm sliding fit with respect to the inside cylindrical surface of a predeter- 3,410,033 Patented Nov. 12, 1968 mined size of sanding sleeve 14. The rod portion 12 is cantilevered from a support end 16 of the spindle by means of which the spindle is attached to and rotatably driven by the drive shaft of a sanding machine, not shown. While various means can be used for attaching the spindle 10 to the drive shaft of the sanding machine, a Morse taper 18 is used in the present instance. In the embodiment shown in the drawing, the rod portion 12 is of a smaller diameter than is the taper 18, and the end of the taper 18 which is positioned away from the rod 12 is provided with a threaded stub 20 on which a nut can be installed to draw the taper 18 into tight engagement with the taper of the shaft of the sanding machine. Intermediate the taper 18 and the rod portion 12 is a collar 22 having a centrally located opening 24 forming the outer surface of an annular recess 26 for receiving one end of a sanding sleeve 14 telescoped over the free end of the rod portion 12. The inside surface of the annular recess 26 is formed by the rod 12, and suitable clamping means 28 are provided in the collar 22 for forcing the end of the sanding sleeve 14 that is received in the recess 26 radially inwardly into tight engagement with the surfaces of the rod 12. In the embodiments shown in the drawing, the clamping means is a setscrew. The setscrew 28 is received in a counterbored opening 30, the outer enlarged portion of which can receive a screwdriver for tightening the setscrew. The setscrew arrangement provided leaves no structure projecting from the collar which can catch the clothing of an operator.
The spindle 10 is not only rugged and efficient in its operation, but is of such a configuration that it can be made quite inexpensively. In some instances it may be desired to make the spindle from one integral piece of metal. In the embodiments shown in FIGURES 1 through 3, it is made from a section of cold rolled rod having a diameter which has a sliding fit with respect to the sleeve 14. The support end 16 of the spindle is made from a piece of bar stock which is suitably machined to provide the taper 18 and collar 22, and which is provided with an axially extending opening 32 of a diameter which provides a press fit with respect to the rod 12. The outer end of the opening 32 is counterbored to provide the opening 24 whose diameter is slightly larger than the sanding sleeve 14, so that when the rod 12 is pressed into the opening 32 the annular recess 26 is formed which will receive one end of the sanding sleeve when it is telescoped over the rod 12.
The embodiment shown in FIGURE 4 is generally similar to that shown in FIGURES 1 through 3 and differs principally therefrom in the manner in which the rod portion 12 and the support end 16 are made. Those portions of the embodiment shown in FIGURE 4 which are similar to corresponding portions in the embodiment shown in FIGURES 1 through 3, are designated by a like reference numeral characterized further in that a prime mark is affixed thereto. In the embodiment shown in FIGURE 4, the rod portion 12' and the support end 16' are made from one integral piece of metal. The collar 22' is made annular in shape with an opening 36 there through having a diameter slightly larger than the outside diameter of the sanding sleeve 14. The support end 16' of the spindle 10' is provided with a stepped cylindrical portion 38 whose diameter provides a press fit with respect to the opening 36 of the collar 22'. The stepped portion 38 has a shoulder 40 which projects radially outwardly from the rod portion 12 and has a spaced shoulder 42 for engaging one end of the collar 22'. The collar 22' is pressed upon the cylindrical portion 38 until it engages the shoulder 42' to thereby insure accurate location of the collar on the structure.
While in some instances it may be desirable to use more '3 than'onesetscrew as a clamping means for holding the sanding sleeves 14 in position on the spindle, it has been found that one such setscrew in many instances provides a completely satisfactory clamping means for both holding a sanding sleeve 14 in position and providing a driving engagement between the spindle and sanding sleeve.
The spindle is a marked improvement over prior structures, since it achieves all of the objects heretofore enumerated, and allows the sanding sleeves to be installed and removed quickly without taking the spindle 10 out of the drive shaft of the sanding machine. In some instances the prior art structures are so elaborate and cumbersome that it is easier to remove the spindle structure from the machine and replace the sleeve on a bench in a tool crib than to try and accomplish the installation of a new sleeve while the spindle is installed on the machine. It will further be seen that the spindle shown in the drawing involves so few parts that it can be made from one integral piece of metal, if so desired.
While the invention has been described in considerable detail, I do not wish to be limited to the particular embodiments shown and described, and it is my intention to cover hereby all novel adaptations, modifications and arrangements thereof which come within the practice of those skilled in the art to which the invention relates.
What I claim is:
1. A spindle for supporting and driving tubular sanding cylinders having a predetermined inside diameter, said spindle comprising: a solid rod having a diameter which slidingly receives a tubular cylinder of predetermined inside diameter, a fixed collar on said rod forming an annular recess around the outer surface of said rod and opening into one side edge of said collar to receive an end of a tubular cylinder slid endwise over said rod, means on the opposite side of said collar from said annular recess for supporting and rotating said spindle, and at least one setscrew within the confines of said collar for forcing an end portion of a tubular cylinder received in said annular recess radially inwardly against said rod.
2. A spindle for supporting and driving tubular sanding cylinders having a predetermined inside diameter, said spindle comprising: a solid rod having a diameter which slidingly receives a tubular cylinder of predetermined inside diameter, a fixed collar on said rod fit forming an annular recess around the outer surface ofsaid rod and opening into one side edge of said collar to receive an end of a tubular cylinder slid endwise over said rod, said spindle having a portion with a concentrically positioned taper thereon on the opposite side of said collar from said annular recess for supporting and rotating said spindle, and means within the. confines. of said collar for forcing an end portion of a tubular cylinder received in said annular recess radially inwardly against said rod.
3. A spindle for supporting and driving tubular sanding cylinders having an internal opening of predetermined diameter and sidewalls of predetermined thickness, said spindle comprising: a solid rod having a taper at one end and a shoulder facing in the opposite direction spaced from said taper with a first cylindrical surface of a diameter larger than the tubular cylinders positioned between said taper and said shoulder, said rod having a second cylindrical surface of a diameter less than said first cylindrical surface which provides a sliding fit with the internal opening of the tubular cylinders and which extends between said shoulder and the opposite end of said rod, a collar having an opening therethrough the sidewalls of which have a press fit'with respect to said first cylindrical surface and which is fixed to said rod outwardly of said first cylindrical surface, and at least one setscrew threaded into said collar for forcing the end of a tubular cylinder positioned beneath said collar against said rod.
References Cited UNITED STATES PATENTS 707,082 8/1902 Brown 51-392 X 1,120,023 12/1914 Cangen 51360 1,525,391 2/ 1925 Iacoponelli 51-358 1,929,274 10/1933 Ellis 51-399 2,800,750 7/ 1957 Field 51--375 FOREIGN PATENTS 493,985 10/1938 Great Britain.
LESTER M. SWINGLE, Primary Examiner. D. G. KELLY, Assistant Examiner.
UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,410,033 November 12, 1968 Norman V. Fehrm It is certified that error appears in the above identified patent and that said Letters Patent are hereby corrected as shown below:
Column 1, line 27, after "design," insert -'rugged in construction, and efficient' in its operation.--.
Signed and sealed this 3rd day of March 1970.
Edward M. Fletcher, Jr. WILLIAM E. SCHUYLER,
Attesting Officer Commissioner of Patents