US2637894A

US2637894A - Refacing tool

Info

Publication number: US2637894A
Application number: US120299A
Authority: US
Inventors: George J Smoleny
Original assignee: Dill Manufacturing Co
Current assignee: Dill Manufacturing Co
Priority date: 1949-10-08
Filing date: 1949-10-08
Publication date: 1953-05-12
Anticipated expiration: 1970-05-12

Description

G. J. 'SMOLENY REFACING TOOL May 12, 1953 Filed Oct. 8. 1949 INVENTOR. Gama/I SMOLENY BY 6 I Patented May 12, 1953 REFACING T0915 George J5... Sinol'eny; Cleveland; 611110,, assi'gnorto The Hill; Manufacturing Company, Gleveland; mliu alcnrpnmtiomof?Ohio- Annlibatibn October. 8, 1949,.Serial No:.,12il,2,33z

3r. Glaima. (61.; 29 103? This. invention relates, to a; refacingtool that particularly? adapted refacing the endsof alve. stems such, as. used. with pneumatic tires, although: the. tool; is." adapted for other uses" as, for instance, the: refacing of the valve seats of faucets and" other; types of valves.

An object of the invention is: to' provide an improved and novelirefacihg; tooliwhich is" simple in: construction, isreadily and? economic ally" manufactured and. assembled? and is eifici'ent in use.

lidfore particularly anobject of the: invention is to provide in' a refacihg; tool are improved and novel cutter elementiwhich can be rea'dilyformed endlthereofi an inwardly extending bore in which froma. metal. dislsby. simple operations, such as readily and economically produced stamping or forming and. drilling operations; thatv do not require special expensive machinery for; the purpose.

A. fiutther object is to pmiiide a refacing: tool capabie' of. cutting, the end at at. v'a-lve stem; With a such that the; rubber gasket: in;v the usual valve: cap will not. be damaged when; the cap; is: tightened. Qrdinarihr the. cutting of such radius. in the end of. a valve; stem requires: the use:- oil a. cutter that is first: formed to. machine surfaces. thenhas. edge cut:- away to produce. the. desired shape, and; finally'has. its teem. relieved to 13110311618: clearance.

Blunt-her and. additional objects: and advantages nethereinbeforereierrcdzto;wilhbecomeiapparent during the detailed description of an embodiment of the invention which is to follow.

Referring to the accompanying drawing illustrating said embodiment of the invention,

Fig. 1 is a view, partially in elevation and partial y in section, of a refacing tool embodying the invention.

Fig. 2 ,is a sectional view on a larger scale than Fig. l and is taken substantially on line 2-2 of Fig. 1 looking in the direction of the arrows.

Fig. 8 is a sectional view on a larger scale than Fig. 1 and is taken substantially on line 3-3 of Fig. 1 looking in the direction of the arrows.

Fig. 4 is a detached plan view on a still larger scale of the cutter element of the refacing tool shown in Fig. 1, and

Fig. 5 is an elevational View substantially on the scale of Fig. 4 of the cutter element with the body of the tool indicated by dot and dash lines.

The reiacing tool comprises a shank Ill-which in this instance is hexagonal in cross-section, a handle H and a body l2. The handle II is shown for illustrative purposes in the form of an elongated cylindrical member having centrally of one one. end of." the shank Hi mayhave. pressed? ht to secure. the. shank. and; the. hand1e.t'og,eth.e1:.. It will he understood; that the. handle. might. be

interconnected, in. any other well known. manner and also that the shank. which is. illustrated" as hexagonal. in cross. section. might have various desired cross. sectional" configurations;-

The body [2 is of cylindricallshap-e'and'is provided with. a. centralbore f3 extending longitudihmly of the body from one. endthereof, and with a coaxial camiterbore. 1'4; extending centrally of. the body from the other end thereoii. The inner endoi the counterbore. M. provides. an inter,- nal'. shoulder. L5. in. the. body whichis shown as tape-red Thea-shank it has itsend. remote, from thehandle Iii provided, with. a reduced. portion that. hasa. pressed fitlin the bore. l3. oi thefbody. Of. course the shank. might.- beconnected to. the body 5.2.111 any other desiredmanner;

Thecutter element. is. indicated. at 1.6: and is in the, form of. a. thin. metal disk. as, forv instance, for some usesthe cutter elementcouldbe formed of .615 stock, although it is notthe-purposeto. be limited to. this gauge. stockv alone, The. cutter element. will be. formed. of a. suitablermetal. which will. have therequisite hardness for the purpose orwhich. can be hardened. and treated, to provide it with the requisitehardness.

The dish. whichv is. formed. into the; cutter element may be hexagonal in configuration or may have any other inulti-sided periphery as, for example, the three sided periphery shown in the drawing and wherein the points constituting the intersections of the sides are indicated at ll. The cutter element It is provided with a central opening ii? and intermediate said opening and the periphery of the cutter element there are three equally spaced smaller openings 19. The centers of the openings 19 are located on a circle the diameter of which equals the mean diameter of the usual valve stem. The cutter element is formed or bent to provide three equally spaced bowed portions or grooves 25 radiating from the central opening (8 to the periphery of the element and with the longitudinal center lines of the grooves located on a diametral center line of the openings 9. The grooves 23 are so shaped that their sides are disposed substantially at right angles to each other. The connection between the sides of the grooves and the connection between the body of the element and the sides of the grooves are-formed on predetermined and preferably equal radii. The bending of the material of the cutter element to form the grooves 20 causes the material forming the circumferential edges of the openings [9 to be angularly disposed so as to provide cutting edges, as, for instance, disposed at an angle of substantially 45.

The counterbore M in the body l2 has its side wall of general polygonal configuration, in this instance of hexagonal configuration, and the cutter element is positioned in the counterbore with the points ll of the element located in wall angles of the counterbore as clearly shown in Fig. 2. The cutter element when positioned in the counterbore is limited in its movement in one direction by the shoulder I and is so arranged as to have the crests of the grooves 20 located toward the outer end of the counterbore. A cylindrical sleeve or bushing 2| has a forced or pressed fit in the counterbore l4 and retains the cutter element in position between the shoulder and the inner end of the sleeve 2i, it being noted, however, that the cutter element floats in the body, that is it is not clamped rigidly against the shoulder if: by the sleeve 2 I.

From the foregoing it will be seen that the facing tool embodying the invention can be readily and economically manufactured and particularly with respect to the cutter element which is formed by simple inexpensive operations from a thin gauge metal disk.

It will also have been observed that the tool 5 comprises only five parts which can be readily assembled without the necessity of using screws or other securing means. As illustrative of one use to which the tool may be put reference is had to the refacing of the valve stem such as is used in pneumatic tires. The outer end of the valve stem may be inserted into the sleeve 2| and the user of the tool then simply rotates the tool by the handle H with the cutter element engaging the end of the valve stem. This rotation of the tool causes the cutter element and particularly the edges of the openings 19 which contact the end of the valve stem to cut or reface such end of the stem.

Although a preferred embodiment of the invention has been illustrated and described herein it will be understood that the invention is susceptible of various modifications and adaptations within the scope of the appended claims.

Having thus described my invention, I claim:

1. A cutter element adapted to be mounted in a recess of a tool body and to be retained therein by a retaining member and comprising a disk having a peripheral configuration adapted to non-rotatably interfit the wall of the recess of a tool body, said disk being provided with bent portions extending from the periphery of the disk toward the center thereof and forming grooves adapted to face inwardly of the recess of a tool body, said disk being provided with spaced openings located in said bent portions, and said grooves formed by said bent portions having their longitudinal center lines located on diametral lines of said openings and intersecting at the center of the disk.

2.. A cutter element as defined in claim 1 and wherein said disk'has a central opening while said spaced openings are located intermediate said central opening and the periphery of said disk and have. their centers located on a circle concentric to said'central opening with said centers angularly spaced on said circle, said grooves radiating from said central opening to the periphery of said disk and having their 1011- gitudinal center lines coinciding with diametral lines of said spaced openings which intersect at the center'of said central opening.

3. A cutter element as defined in claim 2 and wherein said central opening is of larger diameter than said spaced openings and the peripheral edges of the spaced openings are angularly disposed to .provide cutting edges.

GEORGE J. SMOLENY.

References Cited in the file of this patent UNITED STATES PATENTS