US2544377A - Attachment for floor sanders or the like - Google Patents

Description

March 6, 1951 F. c. COOKE ATTACHMENT FOR FLOOR SANDERS OR THE LIKE 2 Sheets-Sheet l Filed Feb. 5, 1947 l el March 6, 1951 F. c. cooKE 2,544,377

ATTACHMENT FOR FLOOR SANDERS OR THE LIKE Filed Feb. 5, 1947 2 Sheets-Sheet 2 Patented Mar. 6, 1951 UNITED STATES PATENT omer:

.ATTACHMENT .FOR FLOOR SANDERS '0R THE LIKE 'Francis C. Booke, Hartford, Conn.

Application February 5, 1947, Serial 'No.'726,556

(Cl. l-177) 1 Glaim.

T his invention relates to an attachment for licor-sanding machines, and more particularly to an attachment which will enable the Asanding of oors to be effected under radiators or articles of furniture and in other locations which cannot be reached with the usual machine.

When floors are reinished, this, of course, is ordinarily done with a so-called sanding `machine, usually electrically driven. ,In addition to the machines for sanding the main portion of the floor, so-called edgersJ are provided which enable the sanding of areas close lto the walls or baseboards o f the room which cannot Zbe done with the larger machines, and this saves Athe hand scraping of lsuch areas. However, even with such machines, it is 'not possible to scrape any `portion of the floor `which is not accessible from above, and, therefore, 'such portions as may be under radiators or articles of furniture which may be permanent or difficult to move cannot be reached.

I contemplate by the present invention vthe provision of an attachment which may be readily and easily applied to existing machines, the attachment being adapted to project 'laterally from 'the body of the machine and being -of very low height, so that it can extend below a radiator or any article of furniture which may "be spaced even a short distance above the liioor level. Moreover, the sanding disk is Apositioned at the extreme end of the attachment, so that the oor may be scraped substantially flush with the wall or baseboard, and a clean `job accomplished.

One object of the invention is to vprovide an attachment for floor Sanders which will enable the scraping of iioors below Iarticles of furniture.

A further object of the invention is to provide a floor sander comprising a laterally extending arm or support which carries a sanding disk, this support being of low height and projecting laterally from the main frame of the sander, whereby it may extend -under articles of furniture.

Astill further .object of the invention is to pro-` vide an attachment which may be readily and easily connected to a sanding machine, the attachment extending laterally from the body of the machine and carrying a rotating sanding disk and driving connections between this disk and the drive of the sanding machine.

To these and other ends the invention consists in the novel features and combinations 0f Parts to be hereinafter described and'claimed.

lathe .acoompariyne drawings:

Fig. 1 is a side elevational view of a 4floor-sand- 2 ing machine having my attachment applied thereto;

Figs. 2, 3 and 4 are fragmentary eleva-tional views of the lower portion of the machine, showtate the disk I2 to sand or scrape the floor.

ing the manner of securing the attachment 'to the case;

Fig. 5 is a top plan view of the attachment removed from the machine;

Fig. 6 is a sectional View on line 6--3 of Fig. 5;

Fig. '7 is a bottom plan vview of the attachment;

Fig. 8 is a sectional view on line `8--8 of Fig. 6; and

Fig. 9 'is a sectional view through the drive pulley.

To illustrate a preferred embodiment of my invention, Thave shown a floor-sanding machine having a housing I, the longitudinal dimension of which is generally vertically disposed. To this housing is secured a lower housing II in which "is mounted the sanding disk I2 (Fig. 6), which is adapted to carry the `sheet of sandpaper or other abrasive material ina well-known manner. The disk I2 is secured `to the lower end of a shaft I3, Vthis shaft being rotatably mounted in the housing and suitably driven so as to ro- It maybe noted that the portion II of the housing is open at the bottom to permit the abrasive sheet mounted upon the disk I2 to contact the oor.

As shown in Fig. 4, the lower housing portion III is provided with a laterally projecting ear ill, and, as will be explained hereinafter, this is employed to secure the attachment in place. Likewise, lugs I5 are provided upon the housing I0 to receive bolts I6 to secure the two portions of the housing together, and under the head of one of these bolts may be secured a hook-shaped member I'I, which may also be employed to secure the attachment in place, as will be more fully described later.

As shown more especially in Figs. 5 to 8 of the drawings, the attachment comp-rises a supporting casing 20, this casing being hollow and provided with upper and lower walls 2| and 22. In the upper Wall is provided a relatively large upwardly facing opening 23 which communicates with the downwardly facing opening in the housing II through which the disk I2 projects. The lower wall 22 of the casing 20 is provided with a downwardly facing opening `24 through which projects a sanding disk 25 carried by a hub 26 rotatably mounted in the casing, this hub being provided with a vbelt or pulley groove 21. A sheet of sandpaper'or other abrasive 28 is secured to the disk by means of a screw 41. to be described hereinafter.

It has already been stated that the disk I2 carried by the vertical shaft I3 of the sander is adapted to support an abrasive disk upon its lower face. This sheet of abrasive material is adapted to be secured in place by a screw threaded into the shaft I3 which is provided with a threaded opening 36 for this purpose.

For applying my attachment to the machine, I provide a pulley 3| having a threaded screw 32 secured thereto which may be threadingly received in the opening 3E) when the screw which normally holds the abrasive sheet in place has been removed, so that the pulley 3| may then be rigidly secured to the shaft |3 below the disk |2. A belt 34 is trained around the pulley 3| and the grooved hub 26 of the disk 25, whereby, when the shaft I3 is rotated, the disk 25 will likewise be rotated. It will, therefore, be noted that the driving mechanism which normally drives the disk I 2 of the sanding machine will be employed to drive the sanding disk 25 of my attachment, and, if the pulleys 3| and 26 are of substantially the same diameter, the disk 25 will be rotated at the same speed as would usually be imparted to the disk My attachment is applied to the lower face of the housing portion II, the latter being adapted to rest upon the rear portion of the casing 26 or that portion surrounding the opening 23. In order that the attachment may be readily secured in place without the use of tools, I provide the attaching devices shown in Figs. l to 4.

To this end, a bail or looped member 36 is pivoted at 31 to a lug 38 upon the case 20, and pivoted to the upper end of this loop member is a metal strip or plate 39, the depending free end of which may be engaged in the hook 40 of the member I1. It will be seen that, after engaging this end of the member 39 in the hook 46, the upper end of the loop 36 may be moved toward the casing or to the left, as shown in Fig. 3, and thus move the arms of the loop 36 past dead center position, as shown in this figure, so as to secure the casing 26 to the housing II. In the position of the parts shown in Fig. 3, the tension upon the loop 36 would tend to move this loop toward the casing instead of moving it toward the right, or away from the casing, as would be necessary to disconnect the parts. I have found that this is a very convenient and satisfactory manner of securing the parts together, so that the attachment may be readily attached or detached without the use of tools.

Similarly, another loop or hasp member 4I is pivoted to the casing 26 at 42, and to the upper end of this loop is also pivoted a metal strip or plate 43, which is designed to engage the upper surface of the lug I4 rearwardly of the bolt `44, and the loop 4I may also be moved against the housing past dead center position so as to secure the casing in place at the side of the housing opposite the loop 36.

As shown more especially in Figs. 1 and '1, casters are provided upon the lower surface of the casing 20, these casters being below that portion of the casing which supports the housing Ill, so that the weight of the sanding machine will be carried upon these casters. At its forward end, the casing 20 is adapted to be supported from the floor by the safnding disk 25, so that the latter will be in contact with the floor.

In Fig. 8 of the drawings, I have shown in detail the manner of securing the pulley hub 26 in place. This hub is threaded upon the screw 41 which will preferably be provided with left-hand threads so that the rotation of the disk will not tend to loosen it from the screw. This screw 41 is carried by the inner race 48 of a ball bearing. the outer race 49 of which is received snugly in an opening 50 of the upper wall 2| of the casing 20. This outer race 49 of the ball bearing may be held against removal by screws 5I, the heads of which underlie the edges of the race 49, and these screws 5I may be inserted through openings 52 in the pulley hub 26.

In assembling the parts, the screw 41 is placed within the ball bearing before the latter is inserted into the opening 50, and this screw may be held against rotation by a screwdriver or the like applied to the slot 53 in its upper end, while the hub 26 is screwed firmly thereon. The ball bearing may then be placed in the opening 50 and the screws 5| inserted through the openings 52 to hold the bearing in place.

Thereafter, the abrasive sheet 28 may be placed upon the disk 25 and secured thereto by the nut 54 threaded upon the lower reduced end 55 of the screw 41. This portion of the screw will preferably carry the usual right-hand thread. If desired, a disk of cushioning material 56 may be placed between the disk 25 and the abrasive sheet 28, and it will be noted that the pulley hub 26 is slightly countersunk, so that the nut 54, when screwed in place. will lie above the surface of the abrasive sheet 28 in order that the latter may properly contact the oor and the nut be held out of engagement with the floor.

It will be apparent that in attaching my device to a floor sander, it is only necessary to remove from the opening 30 of the shaft |3 the usual screw which holds the abrasive disk and insert in its place the screw 32 of the pulley 3|. The attachment can then be secured in place by means of the loops 4| and 36, and the device is ready for use.

'It will be also appreciated that, as the casing 2| extends laterally from the housing portions I6 and and is of very low height, it will enable the sanding of floor areas which cannot be reached with the usual machine. Moreover, as the sanding disk 25 is positioned at the extreme outer end of the attachment, floor areas adjacent walls or baseboards or other obstructions on the floor may be reached without leaving an unsanded area adjacent thereto.

At the upper portion of the casing 20, and adjacent the opening 23, are provided supporting platforms 23a to which the casters 45 are secured. It will also be noted that the lower wall 22 of the casing is removable and secured in place by screws 22a, as shown in Fig. '7, in order that access may be had to the belt 34 and pulley 3|.

As shown in Fig. 9 of the drawings, the pulley 3| is preferably made in two sections 66 and 6|, respectively, which sections are detachably held together by screws 62. Between the sections may be placed one or more shims 63. By removing the screw 62 and increasing or decreasing the number of shims, the pulley grooves may be adjusted in width to adjust the tension upon the belt 34. It will be obvious that, when the two sections 6I) and 6I of the pulley are brought closer together, the belt will be tightened.

While I have shown and described a preferred embodiment of my invention, it will be understood that it is not to be limited to all of the details shown, but is capable of modification and variation within the spirit of the invention and within the scope of the claim.

What I claim is:

An attachment for floor-sanding machines having a housing provided with a downwardly- 5 facing opening and a rotating sanding disk projecting through said opening for contact with the floor. said attachment comprising a hollow casing having an upwardly-directed opening adjacent its rear end and a downwardly-directed opening 10 adjacent its front end, means for attaching the casing to the housing of the sanding machine to support the latter from the floor with the upwardly-directed opening of the casing registering with the downwardly-directed opening of the 1 housing to receive the sanding disk in the latter whereby the sanding machine is supported from the iioor'upon the portion of the casing about said opening, a second sanding disk rotatably mounted in the casing on a substantially vertical 20 axis and projecting downwardly through the front opening of the casing, means drivingly connecting said sanding disks including a pulley adapted to be secured to each of said disks and a belt connecting said pulleys and extending rthrough said hollow casing, said casing being closed except for said opening and its interior providing a passage for the belt and abraded material, supporting platforms provided on said casing adjacent and at the rear of said upwardlydirected opening, and floor-engaging casters secured to the underside of said platforms.

FRANCIS C. COOKE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,299,989 Miller Apr. 8, 1919 1,466,606 Trageser et al Aug. 28, 1923 1,891,175 Petersen Dec. 13, 1932 2,079,946 MyersV May 11, 1937 2,097,806 Weidrich Nov. 2, 1937

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