US289248A

US289248A - Expanding reamer

Info

Publication number: US289248A
Authority: US
Publication date: 1883-11-27
Anticipated expiration: 1900-11-27

Description

f (No Model.)

\ VP. GBNDRO'N.

EXBANDING BEAMER. n

` Patented Nov. 27, 188s.

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man? l UNITED STATESPATENT Ormes..

PETERGENDRON, OF TOLEDO, OHIO.`

EXPANDING REAMER.`

SPECIFICATION .forming part of Letters Patent No. 289,248, dated November 27, 1883.

Application filed Janna `l'o @ZZ whom, zit may concern:

Be it known that I, PETER GENDRO, of

Toledo, in the county .of Lucas and State of exact description thereof, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to certain new and i useful improvements in the construction of expanding reamers; and the invention consists in the peculiar construction and arrangement ofthe knives or cutters within the head andthe `means employed for securing them in their adjustable positions, all as more fully hereinafter set forth.

`Figure l is a central vertical longitudinal section through my improved device, and Fig. 2 is a cross-section of the same.

`In the accompanying drawings, A represents the shank, which is provided with the enlarged head B, and with the threaded stud C at the outer end.

D represents the cutters, which are` de signed to it snugly in longitudinal inclined channels cut in the periphery of ther head B, the knives gradually increasing in thickness from point to heel, with parallel sides, While their inner ends are beveled off and enter the collar or sleeve E, which slips over the shank and is retained in its proper position by the nut F,` which is screwed upon the shank, the latter being threaded for that purpose. Upon the outer and threaded end, C, of the shank, I secure a supporting-nut, G, and the nut I-I. "Ihe` inner face of this `nut-H is slightly conically recessed, and has formed in it the radial channels a, which are brought coincident with the longitudinal channels in the head, and are designed to receive the outer or toe end ofthe cutters, which' are slightly beveled or chamfered 0E, so'that they will fit snugly into such recesses or channels a. In practice, when the cutters are retracted so as to perform their function within their smallest diameter, the

greater portion of them is retained within the channels in the head, being securelylocked to place at toe andheel by the collar E and ry 22, 1833. (No model.)

nut F at one end and the nut H at the outer end.

It has been found in expanding reamers where the cutters are projected beyond a certain distance from the head there is no support for the outer or toe end'of the cutters, and hen ce they very often break. In my device, when the cutters are projected from the head to any extent, a supporting-nut is so adj usted that the outer ends of the cutters will rest upon the periphery of such nut, while the channels in to place and prevent any giving from the work. By the use of the tapered channels and cutters of corresponding taper the b0ttoms of the channels form a firm support for the backs of the cutters under all changes in position, and by making the stock or shank and the ribs in one piece, so as to make said ribs solid with the stock at the bottoms of the channels, there is no liability of said ribs being broken off by the side strain to which they are subjected when in use, whereas if the shank or stock were made solid, with a tapering base sliding therein, as has heretofore been proposed, the ribs are only connected to each other at the top "and bottom, and are thus easily broken.

I am aware of the Patents Nos. 71,339, 111,296, and 252,903, and make no claim to anything shown therein.

What I claim as my invention is 1. In an expanding reamer, the combina tion, with the cutter-stock, consisting of the stock A and head B, having a series of ribs formed thereon, said stock, head, and ribs being in one piece, and the ribs forming radiating channels tapering from end to end, of a series of tapering cutters resting on the bottom of said channels, and means, substantially as described, for securing both ends o said cutters to the head, as set forth.

2. Inan eypandiug reamer, t-he combination, with the cutterstock, consisting of the stock A and head B, the latter having alseries of ribs formed integral therewith and radiating therefrom, forming channels taperin from end to end, of the nut F, collar l, tapering cutters D, resting on the bottom of said the face of the nut H hold the cutters rigidly 2 :reggere channels, and dished nut H, substantially as channels, collar or sleeve E, nut F,-support described.

3. In an expanding reamer the outter-stock of Which consists of the shank A and head 5 B, the latter vhaving a series of ribs formed integral therewith and radiating therefrom, forming:r channels tapering from end to end, taper cutters D, resting on the bottom of said ing-nut G, and retaining-nut H,a11 constructed, 1o arranged, and operating substantially as and for the purpose set forth.

P. GENDRON.

Witnesses:

H. S. SPRAGUE, E. SCULLY.