US1557895A - Reamer - Google Patents

Description

Patented Oct. 20, 1925.

UNITED STATES MICHAEL L. snr'ron AND nonnnn HEYER, or OLLYWOOD, CALIFORNIA.

' REAM'ER.

Application filed May 6, 1824. Serial No. 711,426.

To all whom it may concern:

Be it known that we, MICHAEL L. SUTTON and DONALD HEYER, citizens of the United States, residing at Hollywood, in the county of Los Angeles, State of California, have invented certain new and useful Improvements in Reamers;. and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in tools, and particularly to reaming tools.

One object of the invention is to provide a reaming tool which has novel means for adjusting the cutters for differently sized openings, and novelmeans for holding the cutters in such adjusted positions.

Another object is to provide an adjusting means for moving the cutters inwardly or outwardly, and which is operable without permitting the cutters to become disengaged from the holder.

Other objects and advantages will be ap parent from the following description when taken in connection with the accompanying drawing.

n the drawing:

Figure 1 is an elevation of a reaming tool made in accordance with the present invention.

Figure 2 is a vertical longitudinal sectional view through the tool, one of the blades being removed, and shown in dotted lines.

Figure 3 is a transverse section on the line 33 of Figure 2, one of the blades being removed.

Figure 4 is a transverse sectional view on the line 44 of Figure 2, one of the blades being removed.

Referring particularly to the accompanying drawing, 10 represents the cutter holder which is in the form of a tube with its opposite ends reduced in diameter and externally threaded, as shown at 11 and 12, respectively. Formed integrally with the holder, and arranged centrally therewithin,

is a wall 13, having a central opening 14, to which reference will be made later herein. Formed longitudinally in the wall of the tubular holder 10, and with slight spiral inclinations, are the slots 15, the outer ends of which extend into the reduced end portions of the holder, while the inner ends are connected by the longitudinal grooves 16 formed in the wall 13.

Each of the cutters is in the form ofan elongated blade 17 having its ends beveled, as shown at 18, and with the angular recess 19 in its groove entering edge. Into this recess enters the wall 13, which the portions at each end of the recess pass-into the slots 15. The beveled end portions of the cutter extend out onto the reduced ends of the holder.

Disposed longitudinally through. the holder, and through the openingld, of the wall, 13, is a spreader bar or shaftrepresented as a whole by the numeral 20, the ends of said bar being reduced indiameter,

as shown at 21 and 22, the former being threaded, while the latter is provided with a smooth exterior. tion of the bar 20 is cylindrical, at 20, and it is this portion which is loosely received in the bore of the wall 13. V r the bar, between this portion 20, and the threaded end 21 is tapered toward said threaded end, as shown at 22, for engagement with the correspondingly tapered or inclined portion of the inner longitudinal face of the cutter, as shown at 28. The portion between the other end of the cylindrical portion 20, and the reduced end 22 is tapered at 22", in the direction of the cylindrical portion. The larger ends of these tapered portions produce shoulders 24 and 25, respectively. It will be noted that the portion ofthe inner longitudinal face of the cutter, at the other side or endor the recess 19, is inclined to correspond to the taper of the portion 22, and slidably contacts therewith, as clearly seen in Fig. 2.

Threaded on the end 21, of the spreader bar 20, is a nut 26, the inner end of which has a peripheral outstanding flange 27 which bears against the adjacent end of the cutter holder 10, when screwed home. The outer end of the nut 26 is provided with wrench. faces 26', to permit the nut to be turned. Slipped on' the stem of the nut 26 is a nut 28, which engages with the threaded end of the holder 10. to maintain the nut 26 tightly against the said end of the holder. The flange of the nut 28 is beveled tooverlie or bear against the beveled end of the cutter 17, to maintain said end of the cutter within the slot of the holder. Threaded onto the other end of the holder 10 is a similar nut 29, the stem 22 being received centrally therethrough, as seen in the drawing. The

The intermediate ,por

The portion of i flange of this nut 29 is beveled to bear against the beveled ends of the cutters, to retain said ends in the slots.

When it is desired to move the cutters outwardly, as when a larger opening is to be reamed, the nuts 28 and 29 are backed ofl sufficiently to partially release the beveled ends of the cutter blades, when the operator rotates the nut 26 inwardly against the adjacentend of the holder 10, with the result that the spreader bar 20 will be drawn toward that end of the holder causing its tapered portions 20 and 22' to ride on the inclined faces of the cutter blades to push said blades outwardly through the slots 15. When the blades have been moved out to the desired distance, the nut 28 and the nut 29 are screwed inwardly until their beveled flanges firmly engage with the beveled ends of thecutter blades, whereby the blades are firmly held in their adjusted position.

l/Vhen the cutter is to be adjusted for a smaller opening, the nuts 28 and 29 are 'again backed off, and the nut 26 turned outwardly, which permits the spreader bar to move toward the other end of the holder 10, whereupon the inclined faces of the cutters will slide down on the tapered portions 20' and 22, and move into the slots 15.. Upon turning the nuts 28 and 29 toward the ends of the holder 10, the beveled flanges of said nuts will bear against the beveled ends of the cutter blades, and firmly hold the blades in position.

What is claimed is:

An expanding reamer including a longitudinally slotted holder having an interme diate transverse wall in each slot, cutter blades disposed in the slots of the holder and having inner inclined faces and outer beveled ends, the intermediate portion of the inner edge of each cutter blade having against the adjacent end of the holder "for moving the bar to adjust the blades through the slots of the holder, said nut being retained in position by one of said holder engaged means.

In testimony whereof, we ahix our'signatures.

MIKE L. SUTTON. DONALD HEYER.

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