US1838416A - Rotary brush - Google Patents

Description

Patented Dec. 29, 1931 UNITED STATES ISAAC M. LECKER, OF NEW YORK, N.

RGTARY BRUSH Application filed October 23, 1929, Serial No. 401,700, Renewed May 29, 1931.

This invention relates to improvements in rotary brushes and particularly to that type used for polishing or bufiing metal or like articles.

a The primary object of the invention resides in a rotary brush including a ring-shaped aluminum brush head which is keyed to a central hub or collar fixed to a rotary shaft which facilitates the removal of the brush head without disturbing the hub to enable replacement of worn bristles in the head, thus permitting the brush head to be used over and over again to prolong the life of the same which constitutes a saving in material and labor.

Another object of the invention is to provide a rotary brush which is indirectly connected to a rotary shaft by an intermediate hub or collar which facilitates the removal of the brush head by freely passing the same over any other collars, washers, or like obstructions which might be mounted along a shaft, thus eliminating the necessity of removing these would be obstructions when sliding the brush head longitudinally from the shaft.

A further object is to provide a rotary brush of the kind mentioned in which the inner peripheral wall of the brush head is formed with circumferential grooves for countersinking the looped intermediate portions of the bristle tufts to enable the brush head to be freely slid into position upon its hub or supporting collar.

With these and other objects in View, the invention resides in the certain novel construction, combination and arrangement of parts, the essential features of which are hereinafter fully described in the annexed specification, are particularly pointed out in the appended claims, and are illustrated inthe accompanying drawings, in which:

Figure 1 is a side elevational view of my improved rotary brush in a position upon a shaft and showing parts broken away in section.

Figure 2 is a horizontal sectional view therethrough.

Figure 3 is a detail perspective view of the y brush head per se.

Referring to the drawings by reference characters, the numeral 10 designates a rotatable shaft having a longitudinal key way 11 provided therein and slidable onto the shaftlO'is a central hub or collar 12 which '58 may be made-ofaluminum or other like material and which has its inner peripheral wall provided with a groove or key way 13 which alines with. the key way 11 to receive a key I pin 14 by which the said hub 12 is fixedly con- 09, nee-ted a the shaft 10. i

The periphery of the hub 12 at diametrically opposite points is provided with transverse grooves' 15. which receive inwardly extending diametrically opposed transverse ribs 06 16 providedv onv the inner peripheral wall of a ring shaped brush head 17. The grooves 15 and ribs 16 interfit and constitute key means by which the brush head 17 is fixedly c011- nected to the hub 12. The fit between the hub 10 12 and the inner peripheral walls of the brush head 17 being frictional, the said brush head is heldthereon but may be pulled or driven loosewhen desired to remove the same for a purpose to be presently explained.

The ring-shaped brush head 17 is preferably constructed of aluminum and has its inner peripheral wall provided with a pair of circumferential grooves 1818, while coinmunica'ting with the grooves 18 and opening it) onto the outer peri ahery of the ring-shaped brush head are radially extending openings 19 through which bristle tufts 20 are threaded. The tufts ,20 are bent midway between their ends and the said bent or looped por- B5 tions seat in the annular grooves 18 so as to lie flush with'the inner peripheral wall of the ring-shaped brush head 17 to enable the brush head 17 to be freely inserted upon its supporting hub 12. The two annular rows of bristle tufts extend inwardly in converging relation with each other to provide a continuous brush surface at theouter end thereof, and which type of brush is generally used in shoe repair shops for buffing purposes and may also be employed for the polishing and bufling of metal objects.

From the foregoing description, it will be seenthat the brush head 17 may be removed from its supporting hub 12 by sliding the same longitudinally thereof and will clear any would be obstructions along the shafts 10 such as Washers, collars, jamb nuts and the like. This eliminates the necessity of removing these would be obstructions in order to enable the brush head to be moved off one end of the shaft on which it might be mounted. Furthermore the brush head 17 may be removed when worn and the bristles 20 removed and replaced by new ones, thus effecting a saving in material as the aluminum head 17 and the supporting hub 12 may be used over and over again without replacement.

lVhile I have shown and described what I deem to be the most desirable embodiment of my invention, it will be understood that many of the details may be varied if desired, and I therefore do not limit myself to the exact construction shown, nor to anything less than the whole of my invention limited only by the appended claims.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent is r 1. In combination with a rotatable shaft, a hub fixedly mounted thereon, a ring-shaped brush head fitting on said hub, interfitting key elements on said hub and ring-shaped brush head, a circumferential groove provided in the inner peripheral wall of said brush head, and bristle tufts looped and threaded through radial openings provided in said brush head and opening into said groove, the looped portions being seated in said groove to lie flush with the inner peripheral wall of said ring-shaped brush head.

2. A rotary brush comprising a hub, an annular brush head fitting on said hub ribs extending inwardly from said brush head and seated in complementary grooves provided in the outer periphery of said hub, circumferential grooves being provided in the inner peripheral wall of said brush head, radially disposed openings being provided in said brush head and opening into said grooves and onto the outer periphery of said brush head, and tufts of bristles bent midway between their ends and threaded through said radial openings with the looped or bent portions seated in said grooves to lie fiush with the inner periphery of said hub.

3. In a rotary brush, a hub having a bore therethrough for the passage of a shaft, an annular brush head fitting onto the periphery of said hub, a circumferential groove provided in the inner peripheral wall of said brush head, and bristle tufts looped and threaded through radial openings provided in said brush head and opening into said groove, the looped portions being seated in said groove to lie flush with the inner peripheral wall of said annular brush head.

In testimony whereof I aflix my signature.

ISAAC LEGKER.

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