Патент USA US2135884код для вставки
Nov. 8, i938. J. Dxsco 2,135,884 - ABRADING BEAMER Filed Dec. 10,.v 1934 « 4/23 BY Y _, INVENTOR. ¿faQ-¿vá .ß/¿sco ATTORNEY. 2,135,884v Patented Nov. 8, 1938 UNITED STATESv PATENT OFFICE 2,135384 ABRADING ias-AMER ' Joseph Disco, Santa Ana, Calif. Application December 10, 1934, Serial No. '756,869 .5 claims. (o1. 5'1_1s4.3) This invention relates to an improvement in wedging eifect produced by the sliding thereover - of the slip. The wide end of the flange 8 of each an expansible abrading reamer. It is an object of the invention to improve upon slip terminates at a distance from the end ofthe slip, but the opposite end of said flange preferably a device of the character stated, in a number of extends to the extremity of the slip. ` respects, among which are with regard to supe 5 The enlarged portion 5 of the arbor is shown rior means for detachably supporting a sheet of as being of a uniform diameter from end to end abrading material in a secure manner upon the device; to provide improved means for expanding between the grooves thereof, the taper or slope a sleeve-like sheet of abrading material; to pro vide, in combination with other cooperating parts, an improved expansible split sleeve for having mounted upon it a sheet of abrading ma terial; and to otherwise improve certain portions of the structure as will hereinafter more fully 15 appear. ` Referring to the accompanying drawing, which illustrates what is at present deemed to be a preferred embodiment of the invention, Fig. 1 is an elevational view of the device, with 20 a part of the exterior structure broken away to line I-I of Fig. 6 to disclose the underlying construction. Fig. 2 is a side elevation of the arbor. Fig. 3 is a side elevation of one of the tapered N) Ul slips which form a part of the expanding means. Fig. 4 is a top plan view of the slip shown in Fig. 3. f Fig. 5 is a top plan view of the structure shown in Fig, 1. Fig. 6 is an enlarged cross section, the plane of 30 section being indicated by the line G-Iì on Fig. 1. Fig. ’7 is a fragmental enlarged sectional view of Fig. l, showing the upper ends of the slips and the split sleeve in the expanded position. Referring in detail to the drawing, the arbor 2 has at one end a shank 3 provided with a polyg onal terminal portion 4 to adapt it to be securely held by any suitable means of rotation, or whereby it may be securely held against rotation while the work is rotated about said arbor. Said arbor has a diametrically enlarged portion 5 into the periphery of which are formed portions of a plurality of circumferentially spaced hori Zontal grooves or guides 6 to receive the tapered expanding slips or Wedges 1. Said grooves have inclined bottoms, and said slips are T shaped as viewed in cross section, having each an inner flange 8 to ñt within one of the grooves, and at the outer sides oppositely directed flanges 9 form ing a head. Said inner flanges 8 are each tapered from end to end in such a way as to decrease gradually in breadth and thus form an inclined plane in order to secure the gradual wedging effect desired. The groove for each slip has its 55 bottom inclined in such a way as to double the being confined to the bottoms of the grooves E5. All the arbor parts shown in Fig. 2 may be made in one integral piece. ` In a longitudinally spaced relation to the en largement 5 is shown another shorter diametrical enlargement, or head, II and between said en largements 5 and Il intervenes an arbor section l2 having a uniform diameter which is interme diate the diameters of the shank of the arbor and its enlargements II and_5. The grooves 5 extend the entire length of the three enlarged portions of the arbor, and their bottoms decrease 20% somewhat in depth at one end within 1¿he head II, as indicated at I3. This groove portion I3 is preferably shaped to match up with a cut away part I4 of each slip flange or rib 8. Not far from its polygonal extremity 4 there is secured to the arbor a stop sleeve I5 having at its outer extremity a thick internal annular flange I6 which receives the pin Il whereby said stop sleeve is secured to the arbor. The space be tween said internal annular flange and the oppo site end of the sleeve is occupied by a spiral com pression spring I8, said spring projecting a con siderable distance beyond the inner end of the sleeve. Around the projecting portion of said spring and also over the adjacent part of the sleeve I5 is slidably fitted a follower sleeve IS one end of which is shown beveled at 2I and the other end of which is provided with an internal annular ñange 22 that slidably engages the shank of the mandrel, said flange forming an abutment for one end of the spring I8, the opposite end of said spring engaging the outer end Wall I6 of the stop sleeve I5. This arrangement causes the inner end of the slidable sleeve I9 to abut yieldingly against the adjacent ends of all the slips 1, said sleeve slip ping back when the slips are forced toward that end of the arbor. Such a movement of the slip is effected by means of an adjusting sleeve or nut 50 23 which screws on to the reduced threaded por tion 24 of the arbor the diameter of which threaded portion being such that the bottoms of said grooves 6 lie outside the periphery of said threaded portion so that said grooves do not 55 2 2,135,884 vextend into said threaded portion and cut the threads thereof. 'I'he slips 1 are restrained from radially out ward displacement, in part, by the split sleeve 25, preferably of “Bakelite”, which is closely fitted over them. The slips form a mounting means for said sleeve, and by sliding the slips as above indicated said split sleeve is diametrically ex panded to the desired extent. 10 Over said sleeve is fitted a sheet 26 of mate rial having an external coating of abrasive mate rial. Said sheet has opposite infolded edge por „ v . ., . , tion which enters the split in said sleeve to pre vent relative rotation between said sleeve and said mounting means. 2. In a device of the kind described, an elon gated arbor having for a portion of its length an enlargement of substantially uniform diameter, longitudinal grooves decreasing in depth towards one end of the arbor cut into said enlargement, expanding slips slidably mounted in said grooves, an expansible abrading sleeve mountable upon 10 said slips in a circumscribing relation thereto, said arbor being formed at one end of said en tions 28 which overlie the edges of the sleeve 25 - largement with a threaded end portion, a nut along its split portion. Elongated clips 29 each fitted on said threaded end portion for engaging 15 having, as viewed in cross section, reversely bent vthe adjacent end of said abrading sleeve and the 15 limbs 3| and 32 are provided to hold the abrad adjacent ends of said slips for moving said sleeve ing sheet 26 in place upon the split sleeve v25, and said slips longitudinally of said arbor and one portion of each of said clips gripping .an edge 'said slips along said grooves for expanding said portion of said sleeve and another portion thereof abrading sleeve, a follower sleeve slidably fitted 20 gripping an edge of said sheet. ' on said arbor beyond the other end of said en 20 The four slips shown (a greater or a less num largement and engaging at its inner end the ber may be used'if desired) are notheld together adjacent end of said abrading sleeve, the inner by the sleeve 25 alone, but each slip flange 8 is end of said follower sleeve being closed around apertured at 35 near its broad end; a resilient said arbor, a stop sleeve secured on said arbor ; split circular ring 36 extends through the aper with its inner end telescopically extending into tures 35 to retain the slips in their operative the outer open end of said follower sleeve, said 25 position and yet permit them to slide lengthwise stop sleeve being closed at its outer end and open ofthe arbor. This springv ring 36 is sufliciently at its inner end, and a coil spring surrounding large to encircle the arbor portion I2. said arbor within said follower sleeve and said One of the slips (see Fig. 6,) is furnished with stop sleeve, and bearing at its ends against the 30 an outward projection 3'! which enters the split closed inner end of saidfollower sleeve and the of the split sleeve 25 to. keep said sleeve from closed outer end of said stop sleeve. rotating independently of the arbor. The side 3. An abrading tool including a mandrel having portions of this slip press against the limbs 32 a plurality of circumferentially spaced longitudi , of the clips 29 and thus aid them in their sheet nal grooves, the grooves having walls inclined 35 gripping functions. The follower sleeve I9 has its inner end cupped at 40 and this cupped part registers with the bevels 4I on the adjacent sleeve end, while at 2 the opposite ends of the slipsthe adjusting sleeve 23 is likewise cupped at 42 to engage the sleeve bevels 43. By adjusting the internally screw threaded sleeve or nut 23 to the desired position with relation to the length of the arbor and thus sliding the tapered slips in their grooves against the opposition of the spring I8, the sleeve 25 and abrading sheet 26 maybe varied in diameter to apply the proper amount of >abrasive action to the surface of any bore to be polished or reamed out to a larger size. The split sleeve 25 and abrading sheet 26 com bined with the retaining clips 29 are deemed to constitute a new article of manufacture appli 65 cable to other rotatable reaming devices than the reamer which has been described. I claim: 1. In a device of the kind described, an arbor having circumferentially arranged longitudinally extending guiding means, slips or wedges mount ed upon said guides, said slips being longitudinally movable and constructed and arranged to form a mounting means which is varied in its exter nal diameter by their longitudinal movement, and an abrading member consisting'of a split sleeve mounted upon said mounting means, at least one of said slips having an outward projec longitudinally of the mandrel, slips movable longitudinally in the grooves and cooperating with said walls, said slips being of T-shape in cross-section with one flange >thereof disposed in one of the said grooves, a split tubular member 40 supportedby the slips and having a cylindrical periphery, an abrasive element on the periphery of the member, and means for shifting the slips in the grooves to expand the member. 4. In a device as disclosed, an elongated arbor having external longitudinal grooves decreasing 45 in depth towards one end of said arbor, tapered expanding slips slidably mounted in said grooves, said slips being T-sh-aped in cross section with their T-heads at their outer edges forming bear ing surfaces, means for sliding said slips in said grooves -for moving said slips outwardly of said arbor, and an expansive abrading sleeve sur rounding said slips and engaging the outer bear ing surfaces of the T-heads of said slips. 5’. An abrading tool including a mandrel hav ing a plurality ofcircumferentially spaced longi tudinal grooves, the grooves having walls in clined longitudinally of the mandrel, slips hav ing ñanges movable longitudinally in the grooves 60 and cooperating with said walls, said slips hav ing heads wider than the flanges, a split tubular member supported by said heads land having a cylindrical periphery, an abrasive element on the periphery of said member, and means for shift ing the slipsin the grooves to expand the member. . JOSEPH DISCO.