US1768131A - Inserted-blade cutter - Google Patents

Description

June 24, 1930.

F. P. MILLER INSERTED BLADE CUTTER Filed May 1e'. '1925 INVENTOR ATroRNEYs Patented June 24, 1930 y l I UNITED STATES PATENT OFFICE FRANK P. MILLER, OF MEADVILLE, PENNSYLVANIA INSERTED-BLADE CUTTER Application filed May 16, 1925. Serial No. 30,786.

The invention forming the subject of this an internal adjusting and thrust collar 12, application aims to provide a rotary cutter the Aperiphery of which is provided with of the inserted blade type in which the locacoarse square or acme threads 14 which ention and arrangement of the adjusting and gage transverse ribs 16 on the inner edges thrust collar provides for the expeditious of the blades.

and simultaneous adjustment of the blades, As the collar 111 flatly contacts with the and overcomes the need of reducing the diinner Wall of the groove 10, turning of the ameter and consequently the strength of collar in the proper direction will result in the intermediate portion of the carrier or the forward movement of the blades to 1o reamer body for the accommodation of the bring about an increase in the cutting di- 60 adjusting and thrust collar as is now neces ameter of the tool. Figures 1, 3 and et plainsary with the reamers and other cutters on ly illustrate that the collar 14 is provided in the market. the front side thereof with oppositely lo- Other objects and advantages will be apcated notches 18 for the reception of a suitparent during the course of the following able tool by means of which the collar may G5 description. be turned. Or, if desired, lugs or other n the accompanying drawing forming a tool engaging meansl may be provided on 1 part of this application and in which like the collar for use in adjustment. numerals are employed to designate like It might be said that the invention form- 20 parts throughout the same. ing the subject of this application includes 70 Figure 1 is a fragmentary perspective of the thrust collar 12 mounted on a lcentral an inserted blade reamer embodying the inspindle or extension 22 on one end of the vention; reamer body and provided with a threaded Figure 2 is a detail sectional View through connection with the inner edges of the blades 25 the forward portion of a reamer, the View so that the turning of the collar on the spin- 7 illustrating the improved adjusting means dle will result in expansion of the reamer or for the blades; the like.

Figure 3 is a front end elevation of the Particular attention is directedto the fact reamer, parts being broken away; that the arrangement of the thrust collar Figure 4 is a group view illustrating the at the forward end of the body and in en` S0 internal adjusting collar and one of the gagement with the blades overcomes the blades. need of reducing the diameter of the body In the drawing wherein for the purpose 5 adjacent the rear ends of the blades for of illustration is shown a preferred embodithe accommodation of the collar. There- 5 ment of the invention, the numeral 5 desig fore, the reamer body retains its full di-" S5 nates a carrier for a plurality of blades 6. ameter and strength and in these respects Figures 1 and 2 illustrate that the blades 6, compares favorably with the solid or one which may be of any desired number, are piece reamer. received in gradually deepening grooves 7 Having thus described the invention,

4o and are securely held in an adjusted position what is claimed as new is 90 by locking pins 8, the locking pins in turn A rotary cutter comprising an elongated being held in place by set screws 9. Howbody having grooves, blades in said grooves ever, any suitable means may be employed and having ltheir inner edges formed with to secure the blades in place without in any transverse ribs, the forward portion of said way departing from the spirit of this inbody being provided with an annular vention. groove, an adjusting and thrust member in Figures 1, 2 and 3 illustrate that the forthe annular groove at the forward portion ward end of the carrier or reamer body 5 of the body and having contact with the is provided with an annular groove 10 for inner Wall of the groove to hold the adjust- 0 the reception of what might be said to be ing and thrust member against endwise'100 movement in one direction with respect to the body, said adjusting and thrust member being confined to the forward end of the body and provided with peripheral threads engaged with the transverse ribs on the inner edges of said blades, whereby the turning of said member in one direction will advaneesaid blades. n

In testimony whereof I ax my signa- 10 ture. FRANK P. MILLER.

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