US1839537A

US1839537A - Expanding reamer

Info

Publication number: US1839537A
Application number: US282375A
Authority: US
Inventors: Frederick C Eisenmann
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-06-02
Filing date: 1928-06-02
Publication date: 1932-01-05
Anticipated expiration: 1949-01-05

Description

5, 1932. F. c. EISENMANN EXPANDING REAMER Filed June 2, 1928 [III INVENTOR 4 rod at all times in its operative position.

Patented Jan. 5, 1932- FREDERICK G. EISEN MANN, 0F PHILADELPHIA, PENNSYLVAN EXPANDING REAMER Application filed'June 2, 1928. Serial No. 282,375.

The object of this invention is to devise a novel and simplified construction of an expanding reamer wherein the reaming plates can be adjusted withouttaking the reamer 5 apart.

A further object is to devise a novel and simplified construction of a reamer wherein the reamer plates are adjusted by means of a cone having in threaded engagement with it an adjusting member which overhangs the plates and which is accessible when the ream-- or is assembled.

With the above and other objects in view as will more clearly hereinafter appear, my

. reamer.

It further comprehends a novel construc-- tion of an expanding reamer wherein the body portionis provided with a longitudinally adjusting cone which is accurately guided therein and which is threaded to receive an adjusting rod having a collar to overhang the reaming plates and provided with-a nut in threaded engagement with the body portion and retaining said actuating Other novel features of construction and advantage will hereinafter more clearly appear in the detailed description and the appended claims.

For the purpose of illustrating the-invention, I have shown in the accompanying drawings a typical embodiment of it, which,

in practice, will give reliable and satisfactory results. It is, however, to be understood that this embodiment is typical only and that the various instrumentalities of which my invention consists can be variously arranged and organized, and that the invention is not limited to the precise arrangementand 0rganization of these instrumentalities as here in set forth. 1

Figure 1 is a longitudinal section of an invention comprehends a novel expanding thev plates and their fastening means removed.

Figure 4 is an end view of Figure 3. Figure?) is a plan view in detached position of the actuating member.

Figure. 6 is a plan view in detached posi- 7 tion of the cone. v

Figure 7 is an end elevation of an end cap employed.

Figure 8 is a section on line 88 of Figure 7.

Figure 9 is an end view of an abutment nut.

Figure 10 is a section on line 1010 of Figure 9. Figure 11 is a side elevation of one of the reaming plates.

Similar numerals of reference indicate corresponding parts. Referring to the drawings 1 designates thebody portion of an expanding reamer embodying my invention. The body portion is provided with a rearwardly extending cylindrical shank 2 which terminates in a polygonally shaped extension 3.

The body portion is provided with the longitudinally extending slots 1 which are adapted to receive the reaming plates 5, the

outer faces of which are straight while the outwardly or slightly tapered as indicated at 7. The body portion is provided with an aperture or bore 8 which, at its rear portion, merges into a cylindrical aperture 9, and the wall of the bore 8 at its forward end is threaded as at 10. p

11 designates a cone longitudinally adjustable in the bore 8 and provided with a cylindrical extension 12 at-its rearward end which accurately fits the cylindrical extension 9. The cone 11 is provided with an internally threaded aperture 13 which opens at its forward end and which is adapted to receive a threadedrod 14 which forms an actuating or adjusting memberfor the cone 11 and thereby for the plates 5. 1

The adjusting member is provided with a. collar 15 which bears against the forward ends of the knife plates and which is secured in position by means of a nut 16 engaging the threads 10 of the body portion and provided with the spanner receiving openings 17.

The rear face of the nut 16 is recessed as at 18 to receive the collar 15. The nut 16 is apertured as at 19 to permit the forward cylindrical extension 20 of the adjusting member to pass therethrough, and the forward end is preferably provided with a slot 21 adapted to receive a tool, such as for example, a screw driver, for effecting its rotary adjustment.

The body portion 1 is externally threaded as at. 22 to receive a clamping nut 26 which bears against the rear ends'of the reaming 11 is prevented from rotation during its adthe shank 2 extension 20 of the adjusting member by justment by means of a screw 27 carried by of the body portion and extending into a longitudinally extending slot 28 in the cylindrical portion 12.

I also preferably secure to the cylindrical means of a fastening device, such as for ex ample the pin 29 illustrated, a washer 30, so that the adjusting device is locked with re- ,spect to the nut 16. It will be seen that the adjusting device is thus permitted to revolve without longitudinal movement.

7 Assuming now that the reamer is in as sembled condition and it is desired to ad ust the reaming plates, one of the nuts 26 or '24 is loosened, and the adjusting member is turned in the proper direction to cause the threaded rod 1% to move the cone 11 forwardly or rearwardly and then the nut which has been loosened is tightened, so that the reaming-plates will be rigidly clamped in the position to which they have been adjusted.

Special attention is directed to the fact that the adjusting member is always accessible without taking the reamer apart, as the end 20 extends forwardly into such position that it can be actuated by a desired type of operating tools, such as for example, a screw driver. I

My present invention can be economically manufactured and any parts which are sub jected to wear may be readily replaced.

The present construction of reamer provides a large range of adjustment and the reaming plates can be readily removed when it is desired to sharpen them or to replace them. It will also be apparent that the .cones 11. have a different taper fromv thatillustrated and may be substituted for the one illustrated in the drawings. My present construction of reamer is of special advantage since it can be made in SlIlZLll'SlZBS and still have the requisite strength to accomplish the work for which it is intended.

In some cases, it is preferable to provide the shank 12 with the slot or key-way 27 int-owhich extends a screw 28 carried by the body portion of the reamer, so that the cone will have a rectilinear movement during its longitudinal adjustment without any relative rotation with the body portion.

It is also advantageous to employ, in some cases, a washer 29 fixed to the extension 20 by means of av pin or equivalent fastening device 30, and the nut 16 is preferably recessed to 'IGCBIVG such Washer. This maintainsaccurate alignment of the adjusting member at all times.

It will now be apparent that I have de vised a new and useful expanding reamer which embodies the features of advantage enumerated as desirable in'tlie statement of the invention and the above description, and while I have, in the present nstance, shown and described a preferred embodiment thereof which will give in practice satisfactory and reliable results, it is to be understood that this embodiment is susceptible of modification in various particulars without de parting from the spirit or scope of the invention or sacrificing any of its advan ta es.

Having thus described my invention w at I claimas new and desire to secure by Letters Patent, is

1. In an expanding reamer, a body portion having blade receiving slots and having .a shankprovided with an opening through one end and of reduced diameter at its rear end, a cone slidable in said opening v and having a rearwardly extending cylindrical extension to fit the reduced diameter of said opening, means common to said body portion and cylindrical extension to prevent their relative rotation, blades in'said slots having their inner faces inclined throughout their length, a cone adjusting member in threaded engagement with said cone and having means abutting against the forward ends of said blades, a nut in threaded engagement with said body portion and hearing against the forward ends of said blades, and a nut in threaded engagement with said body portion and bearing against the rear ends of said blades to contribute to retain them in their locked position.

2..In an expanding reamer, a body portion having blade receiving slots and having a shank provided with an opening through itsforward end and of reduced diameter at its rearward end, a cone slidable in said opening and having at its rearend a cylindevice carried by said shank and extending into said slot, reaming blades in said body portion slots and having their inner faces inclined throughout their length to engage said cone, a cone adjusting member in threaded engagement with said cone and having a collar abutting against said blades, a nut in threaded engagement with the outer wall of said bore and-forming an abutment for said collar, said cone adjusting member extending through said nut into a osition accessible to the operator, the end aces of said blades inclining outwardly and towards each other, and forward and rear nuts on said body portion conforming toand engaging the inclining portions of said blades to secure them in clamped position.

FREDERICK C. EISENMANN.