US3263666A - Abrading device - Google Patents

Description

Aug. 2, 1966 R. c. COLLINS ABRADING DEVICE Filed June 18, 1964 INVENTOR.

\ ROBERT C. COLLINS chuck 2 of a power tool.

3,263,666 ABRADING DEVICE Robert C. Coilins, 746 NE. 67th St., Miami, Fla. Filed June 18, 1964, Ser. No. 376,042 Claims. (Cl. 125-5) This invention in general relates to abrading devices and more particularly to an abrading attachment for a power driven drill.

The present invention shows and describes certain improvements to applicants prior application for Power Driven Abrading Tool, Serial Number 339,387, filed January 22, 1964, which improvements relate in general to simplification in construction and the addition of guards on the device for protecting objects lateral to the surface being abraded and also to protect the user from flying debris.

A principal object of the invention is the provision of an abrading device having a plurality of radially journalled abrading discs rotated about axes in a plane normal to the rotation of a common drive axis and including a circular guard member surrounding the abrading discs.

Another object of the invention is the provision of a disc-like guard secured to the axis of power rotation of the abrading device which rotates in a plane parallel the rotation of the axes of the abrading discs for intercepting and deflecting abraded debris propelled by said discs.

An alternate construction embraces a plurality of axles radially equi-spaced in a plane normal to an axis of rotation, which axles are slidably retained in a separate bore in a toroidal socket by a band contracted and retained about the outer ends of said axis.

These and other objects and advantages in two embodiments of the invention are shown and described in the appended specification and drawing, in which:

FIG. 1 is a side elevation of the abrading device.

FIG. 2 is a bottom plan view of the device shown in FIG. 1.

FIG. 3 is a cross sectional side elevation taken through section line 3-3, FIG. 2.

FIG. 4 is a bottom plan view of a construction alternate to that shown in FIG. 1.

FIG. 5 is an enlarged fragmentary cross sectional view of the device shown in FIG. 4.

Referring to FIGS. 1, 2, and 3, a shank member 1 is intended to be secured in and rotated by a conventional The shank 1 has an enlarged lower end 3 threaded to engage the upper end portion of a conical spring 4, as shown. The lower end of spring 4 is threaded into the bore of a toroidal collar 5. Five axles 6 are threaded in equi-spaced radial relation to the axis of collar 5, as shown. Each axle 6 has journalled thereon three toothed abrading discs 7, which are spaced by washer-like spacers 8. The outer end of each axle 6 is provided with a transverse V groove 9 for retaining a pretensioned guard ring 10 sprung therein.

Referring to FIGS. 1 and 3, a guard disc 11 is snugly threaded coaxial to the outside of the upper portion of spring 4, as shown, which disc extends normal to the axis of rotation of the device for intercepting and deflecting abraded products from traveling in an upward direction.

The alternate construction, shown in FIGS. 4 and 5, involves only the axles 6a and the guard band 10a. The axles 6a are slidably secured in separate bores 12 in collar 5a, better shown in FIG. 5. The band 10a has holes in offsets 13 for retention on five of the axles 6a. The master axle 6am is provided with a recess at the outer end thereof for a C-washer 14, which retains the ends of the band 10a, which has elongated holes for engaging axle 6 am, as shown in full lines in FIG. 5. The dotted United States Patent 0 3,263,666 Patented August 2, 1966 lines in FIG. 5 show the position of one of the ends of band 10a prior to its sprung engagement on the master axle.

In operation, it is apparent from FIG. 1 that when the chuck 2 is rotated, the discs 7 will contact and abrade a surface substantially normal to the axis of rotation. It is apparent that lateral angular deviations from the normal axis of rotation will be compensated by the universal fiex of the spring 4 and it is also apparent that the products of abrasion will be deflected and prevented from upward trajectories.

The replacement of the abrading discs 7 in the device shown in FIG. 1 is accomplished by the mere forceful springing of guard ring 10 off and onto the V grooves in the axles 6.

It is apparent that the axles 6, when threaded into the collar 5, will aid in securing the lower portion of the spring in the collar 5; however, when the axles 6 require replacement, they must be individually unthreaded from and rethreaded into the collar 5.

In the alternate construction, shown FIGS. 4 and 5, the replacement of both the abrading discs and their axles may be accomplished by removing C Washer 14 from axle 6am and springing the band from the ends of the axles which permits the slidable removal and replacement of both discs and axles.

It is understood that certain modifications in the construction, utilizing the features above described, are intended to come within the scope of the appended claims.

Having described my invention, I claim:

1. A rotary abrading device adapted to be rotated by a chuck comprising a circular body member having a coaxial bore therein,

a plurality of axles in said member extending outward and equi-distant therefrom with the axes thereof normal and coplanar to the axis of said bore and positioned radially thereto,

a transverse groove in the outer end of each of said axles,

a like plurality of abrading discs journalled for rotation on each of said axles,

a resilient ring tensioned around the ends of said axles in each of said grooves for retaining said axles and said discs thereon on said member,

a spring means having one end portion thereof secured in said bore and terminating at the opposite end in a shank coaxial with said bore and adapted to be secured in said chuck.

2. In a rotary device of the character described, a ring forming a body with a coaxial threaded bore therein for receiving a spring means,

said body having a plurality of like equi-spaced bores in the outer periphery thereof having coplanar axes positioned normal and radial with respect to the axis of said threaded bore,

a like plurality of axles slidably retained in said bores,

a predetermined number of abrading discs journalled for rotation on each of said axles, said discs being positioned around the outer periphery of said body,

a single non-continuous resilient guard ring tensioned around the end of said axles for retaining same in said bores and said abrading discs on said axles,

a spring means threaded into said bore for rotating said body when driven.

3. In a rotary abrading device of the character described a body member having a coaxial bore therein,

a plurality of axles in said member extending outward and equi-distant therefrom with the: axes in coplanar relation normal to and radial with respect to the axis of said bore,

a predetermined number of abrading discs journalled for rotation on each of said axles, said discs being positioned around the outer periphery of said body member,

guard means on said axles for retaining same on said body,

a coil spring means having one end portion thereof coaxially secured in said bore,

a shank means coaxially secured to the opposite end portion of said spring means whereby said spring will permit angular deviation between the axis of said shank and said bore when said body is driven by said shank.

4. The construction recited in claim 3 including a circular guard disc secured to said shank coaxial therewith positioned normal to the axis thereof for deflecting products of abrasion when said device is operated, said spring means being located between said abrading discs and said guard discs.

5. A rotary abrading device adapted to be rotated by a chuck comprising a circular body member having a coaxial bore therein,

a plurality of axles including a master axle secured in said member and extending outward and equi-distant therefrom with the axes thereof normal and coplanar to the axis of said bore and positioned radially thereto,

a like plurality of abrading discs journalled for rotation on each of said axles,

a circular guard band having a plurality of holes therein for engagement by the ends of said axles,

the opposite ends of said band lapped over each other and on the end of said master axle and retained thereon by a fastener means associated with said master axle for retaining said discs on said axles,

a spring means having one end portion thereof secured in said bore and terminating at the opposite end in a shank coaxial with said bore and adapted to be secured in said chuck.

References Cited by the Examiner UNITED STATES PATENTS 334,595 1/1886 Maloy 1255 1,230,842 6/1917 Berg 1255 1,337,537 5/1921 Wimmer 125-3 1,581,699 4/1926 Sturrock 1255 2,439,921 4/1948 Brown 306-20 HAROLD D. WHITEHEAD, Primary Examiner.

Claims (1)

1. A ROTARY ABRADING DEVICE ADAPTED TO BE ROTATED BY A CHUCK COMPRISING A CIRCULAR BODY MEMBER HAVING A COAXIAL BORE THEREIN, A PLURALITY OF AXLES IN SAID MEMBER EXTENDING OUTWARD AND EQUI-DISTANT THEREFROM WITH THE AXES THEREOF NORMAL AND COPLANAR TO THE AXIS OF SAID BORE AND POSITIONED RADIALLY THERETO, A TRANSVERSE GROOVE IN THE OUTER END OF EACH OF SAID AXLES, A LIKE PLURALITY OF ABRADING DISCS JOURNALLED FOR ROTATION ON EACH OF SAID AXLES, A RESILIENT RING TENSIONED AROUND THE ENDS OF SAID AXLES IN EACH OF SAID GROOVES FOR RETAINING SAID AXLES AND SAID DISCS THEREON ON SAID MEMBER, A SPRING MEANS HAVING ONE END PORTION THEREOF SECURED IN SAID BORE AND TERMINATING AT THE OPPOSITE END IN A SHANK COAXIAL WITH SAID BORE AND ADAPTED TO BE SECURED IN SAID CHUCK.

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