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Publication numberUS2179995 A
Publication typeGrant
Publication dateNov 14, 1939
Filing dateMar 2, 1938
Priority dateMar 2, 1938
Publication numberUS 2179995 A, US 2179995A, US-A-2179995, US2179995 A, US2179995A
InventorsArthur N Emmons
Original AssigneePorter Cable Machine Company I
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Abrading machine
US 2179995 A
Abstract  available in
Images(3)
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Nov; 14, 1939. A, N, EMMQNS I' 2.179.995

ABRADING MACHINE Filed March 2, 1938 3 Sheets-Sheet 1 M INVENTOR.

ATTORNEYS.

Nov. 14, 1939. A. N. EMMoNs 2,179,995

ABRDING MACHINE ,yl NVENTOIL` F Z- 'BY ATTORNEY Nov. 14, 1939. A. N. lEMMONS ABRADI-NG MACHINE Filed March 2, 1958 5 Sheets-Sheet 3 1'NVENTOR ATTORNEYS Patented Nov. 14, 1939 UNITED STATES PATENT FFIQE ABRADING MACHINE Application March 2, 1938, Serial No. 193,54g

Claims.

This invention relates to abrading machines, and more particularly to a compact, light weight, machine particularly adapted for use in connection with the renishing of oors in instances where it is not necessary to sand the surface of the floor down to the original wood, but only necessary to thoroughly clean and smooth the surface of the floor. For this purpose, the surface of the abrading drums is covered with an abrasive material that will not injure or mark up the surface of the floor, or destroy the effect of the filling in the iioor. For this purpose, a covering of steel Wool tightly wound on the drum is particularly advantageous. However, due to fact that the covering of steel wool on the abrading drum is of substantial thickness, and the fact that the steel wool breaks off and is rapidly thrown from the drum, floor abrading machines of conventional construction are not suitable for use with such abrasive material.

This invention has as an object a machine of the type referred to comprising a particularly compact and light structure which is conveniently manipulated, and which functions in a particularly eiiicient manner.

More particularly, the invention has as an object a machine, as above alluded to, consisting of a. one-piece integral, boxlike, frame in the forward end of which the abrading drum is completely housed, except for a small peripheral portion which extends through the bottom of the housing for engagement with the iioor.

The invention has as a further object a particularly efficient suction system for the collection of dust and particles of steel wool thrown from the drum, and being so arranged as to maintain its eiiciency as the diameter of the drum decreases With use.

The invention has as a further object a structure including the provision kof means whereby the abrading drum can be quickly and conn veniently removed and replaced, or other abrasive elements can be substituted for the steel wool drum.

The invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanying drawings in which like characters designate co-rresponding parts in all the views.

Figure l is a side elevational view of an abrading machine embodying my invention.

Figure 2 is a top plan view with a portion of the top of the frame broken away.

Figure 3 is a front end elevational View with a portion of the frame broken away and the abrading drum shown in section.

The machine as here shown comprises an integral, one-piece, boxlike, frame, the forward 5 end of which is formed with a substantially cylindrical abrading drum compartment i9.. The rear portion of the frame is formed with a fan compartment ll. The frame is piVo-tally supported on a pair of rollers I2 arranged adjacent each 10 side of the frame toward the rear thereof on a shaft il! extending transversely of the frame between the depending sidesid, l5 thereof. The machine is manipulated by a handle it secured in a bracket il detachably mounted on the rear top surface of the frame, as by cap screws I8.

The depending side l5 of the frame is formed with an inwardly extending boss i9 in which a shaft 2t is rotatably journalled in antiiriction bearings 2i. One end of the shaft extends out- 20 wardly through the side l5, and adrive pulley 22 is secured thereto, and the opposite end of the shaft Eil extends outwardly oflthe boss i9 toward the side wall i4. The shaft 263 is arranged substantially centrally of the drum compartment lll, and 25 the side wall M of the frame is formed with an opening 23 substantially coextensive with the drum compartment t0 permit insertion and removal of the drum. The bottom wall of the drum compartment is provided with an opening through which a small portion of the drum extends for engagement with the floor.

The drum 25, as here shown, is covered to a substantial thickness with a layer of steel Wool indicated at 25. The drum 25 is sleevable on a 35 cylindrical member 2l which is preferably pressed upon the extending portion of the shaft 2b and rotatably secured thereto asby a key 23. The drum 25 and cylindrical member 2l are preferably provided with one or more keys o1' driving mem- 40 bers 38, and the drum is held on the cylindrical member by a disk 3i having a central aperture to receive the threaded end of shaft 2l), and on which a nut 32 is threaded. The disk 3l is of such diameter that its peripheral margin overlies the end of the drum 25.

The vacuum or suction system includes a fan 35 arranged in the fan compartment l l and mounted on a shaft 36 journalled in a cap 3l' in antifriction bearings 38. Ihe rear portion of the side wall l5 50 is formed with an aperture to permit installation of the fan, and the cap 3l forms a closure for the aperture and is detachably secured to the frame as by screws 39. The outer end of the shaft 36 carries a drive pulley 40,

The abrading drum 25 and the fan 35 are driven by a motor 4| arranged in a concavity extending transversely of the frame intermediate the abrading drum chamber and the fan chamber. The motor 4| is pivotally mounted at one side to the top of the frame by pin 42, and the opposite side of the motor is provided with an adjusting screw 43 coacting with the forward portion of the frame to effect adjustment of the motor to produce the proper tension on drive belts 44, 45, connecting the motor with the abrading drum and fan respectively.

The suction system further includes a duct 46 extending from an aperture 41 in the inner wall of the fan chamber Il forwardly to the rear side of the abrading drum chamber. The forward portion 48 of the side walls of the duct are outwardly and merge with the side walls I4, l5 at the rear of the drum compartment I0. The bottom wall of the duct 46 terminates at 49, and a dust collecting pan 50 is arranged in this opening and conforms substantially therewith. The rear edge of the dust pan 55 is pivotally mounted to the frame at the forward edge 49 of the duct 46 on a rod 5|. With this arrangement, the forward end 52 of the pan 5D is movable toward and from the floor and is yieldingly urged toward the floor by a helical tension spring 53, one end of which is secured to the rod i3, and the opposite end to a lug 54 secured to the under side of the pan. The under side of the pan is also' formed with a pair of spaced apart bosses 55 between which a roller is rotatably mounted, and which maintains the forward end 52 of the pan a predetermined fixed distance from the surface of the floor.

From the above, it will be noted that the pan 5l) is movable independently of the tilting action of the frame and is maintained at the proper distance from the floor, regardless of the wear of the abrading drum and the reduction in its diameter.

The top of the frame is provided with an aperture 60 constituting an outlet for the fan chamber i l, and a discharge pipe 6I is secured to the top of the frame in register with the opening 60, and to the upper end of which is secured a suitable dust collecting bag 62.

The front end of the frame is formed with a recess 63 forming a covenient hand grip for the front of the machine and which, together with the inner handle I6, affords a convenient means of lifting and transporting the machine about.

It will be understood that the machine is operated by tilting the same forward on the rollers l2 after the motor has been turned on, thus bringing the drum 25 into engagement with the surface of the floor. It will be apparent that the machine described is particularly compact, and consists of a minimum number of parts, and while the abrading drum is completely housed by the frame itself, the drum can be conveniently changed, or other abrasive elements, such as a brush, may be quickly attached to the machine.

What I claim is:

l. An abrading machine of the type described comprising a frame, an abrading drum journalled in the forward end of the frame, and a suction fan mounted in the rear end of the frame, said frame being formed with a suction duct extending from said fan forwardly to the rear side of said drum. the bottom wall of the forward portion of said duct being formed with an opening, a dust pan arranged in said opening and being pivotally mounted to the rear edge thereof, the forward edge of said pan being provided with means cooperable with the surface being finished to maintain the forward end of said pan a predetermined distance from said surface, a motor mounted on the frame and motion transmitting means connecting said motor with the abrading drum and said fan.

2. An abrading machine of the type described comprising a frame, an abrading drum journalled in the forward end of the frame, and a suction fan mounted in the rear end of the frame, said frame being formed with a suction duct extending forwardly from said fan and terminating adjacent and to the rear of said drum, the forward portion of the bottom wall of said duct being formed with an opening, a dust collecting pan pivotally mounted to the rear edge of said opening and extending forwardly and downwardly and forming a closure for said opening, means cooperable with said pan and frame to yieldingly urge the forward end of the pan toward the surface being finished, and means carried by the pan and cooperable with the surface being finished to maintain the forward end of the pan-a predetermined distance from said surface, a motor mounted on the frame and motion transmitting means connecting the motor with said drum and said fan.

3. An abrading machine of the type described comprising a frame, an abrading drum journalled in the forward end of the frame, and a suction fan mounted in the rear end of the frame, said frame being formed with a suction duct extending forwardly from said fan and terminating adjacent to and at the rear of said abrading drum, the forward portion of said duct flaring laterally to substantially the same width as the length of the abrading drum, and the bottom wall of said forward portion being formed with an opening, a dust collecting pan pivoted to the rear edge of said opening, said pan conforming to said opening and forming a closure therefor, means cooperable with said pan and frame for yieldingly urging the forward end of the pan downwardly toward the surface being finished, and a stop member carried by the pan and cooperable with tlie surface being finished to limit such downward movement, a motor mounted on the frame and motion transmitting means connecting said motor, the abrading drum and the fan.

4. An abrading machine of the type described comprising a frame provided with rollers adjacent the rear end thereof for running on the surface being inished, an abrading drum journalled in the forward end of the frame, a suction fan mounted in the rear portion of the frame, said frame being formed with a suction duct extending from said fan forwardly to the rear of said drum, the bottom wall of said duct terminating in spaced apart relation to said drum, a dust collecting pan interposed between said drum and the bottom wall of the duct and being movably mounted on the frame, said frame being tiltable on sail rollers to bring the abrading drum into engagement with the surface being finished, said pan being movable toward and from the surface being finished independently of the tilting action of the frame, a motor mounted on the frame and motion transmitting means connecting said motor with the abrading drum and the fan.

5. An abrading machine of the type described comprising a one-piece, integral, boxlike, frame, said frame being formed with an abrading drum compartment in its forward end and a suction fan compartment in its rear end, one side of the frame being formed with an opening to permit insertion and removal of the abrading drum in the drum compartment, and the bottom wall of said compartment being formed with an opening, an abrading drum journalled in said drum compartment and depending through the opening in the bottom wall thereof, said frame being also formed with a suction duct extending axially vfrom said fan chamber toward said drum compartment, the bottom wall of said duct being formed with an opening adjacent the rear side of the drum compartment, a dust collecting pan arranged in said opening and being pivotally

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5167215 *Oct 11, 1991Dec 1, 1992Equipment Development Co., Inc.Dust removal apparatus for a concrete saw
Classifications
U.S. Classification451/352
International ClassificationB24B7/18
Cooperative ClassificationB24B7/188
European ClassificationB24B7/18F