US1489748A - Valve facing and reseating tool - Google Patents

Description

April 8 1924. 1,489,748

H. J. FlNCH VALVE FACING AND RESEATING TOOL Filed Feb. 12. 1923 2 Sheets-Sheet 2 W 4 INVENMR.

- ATTQRNEX-C Patented Apr. 8, i924.

lTED STATES PA titans Tsar FHQE.

HARRY J. FINCH, OF OIL. CITY, PENNSYLVANIA.

VALVE FACING AND RESEATING TOOL.

Application filed February 12, 1923.

To all whom it may concern:

Be it known that I, HARRY J. FINoH, a

The object, construction and operation of my improved valve facing and reseating tool are herein set forth with suflioient clearness to enable those skilled in the arts to which its construction and use respectively relate, to make and use the same.

This tool is intended especially for use with poppet valves such as are employed in internal combustion motors, and is adapted for the simultaneous refacing of both the valve and its seat. It can, however, be used to reface either the valve or its seat separately if desired.

Both the construction and the method of using the tool are illustrated in the accompanying drawings, in which:

Fig. 1 is a plan View of the tool as it is assembled for the purpose of refacing a valve alone.

Fig. 2 is a central, vertical section of the tool.

Fig. 3 is a side elevation of the cutterhead.

Fig. 4 is a half-sectional-elevation of the centering ring.

Fig. 5 is an elevation of the cutter-head actuating sleeve.

Fig. 6 is an elevation of the feed nut.

Fig. 7 is an elevation of the combined feed-screw and valve holder.

Fig. 8 is a central, vertical section of my device, and the related portion of a motor cylinder, when the tool is used for siinultaneously facing both a valve and its seat.

Fig. 9 is a side elevation of the upper portion of a feed actuating element corresponding to a valve, which is used when only the seat is being re-faced' The construction shown in said drawings is substantially as follows:

The cutter-head which is employed in this tool, is'shown in side elevation in Fig. 3. The upper portion of this head is tubular and the lower portion of same is formed into downwardly-converging walls 1: two opposite quarters of said downwardly-converging walls are removed and to both edges Serial No. 618,582.

of the remaining quarters is suitably attached a cutter 3, 3, 3, 3; said cutters 3 are of greater widthin their vertical dimension-than the thickness of the walls to which they are attached, so that a cutting edge is presented which projects above the upper face of said wall and below the lower face of same. The cutting edges of each cutter are parallel and are disposed at an angle to the axis of the cutter-head: this angle corresponds to the angle of the valve seat to be faced and to the angle of the seating face of the valve, so that, after said valve and said seat have been re-faced said valve will seat truly upon said seat.

When said cutter-head is to be used for re-facing the valve only, it is carried by a bracket l, which is attached to the edge of a work-bench 5, as shown in dotted lines in Fig. 2.

Said bracket comprises a circular, horizontally-disposed base-plate 6, the upper face of which is machined and accurately finished. Formed integrally with said base and projecting below the same is a guidesocket 7 through which a hole is formed concentrically with and perpendicularly with the upper face of said plate. A bushing 7' may be inserted in said hole which may be changed to accommodate stems of difiering diameters. A centering ring, Fig. 4, indicated by the ordinal 8 is placed upon said plate 6 and is free to be revolved thereon. The upper face of said ring 8 is formed at an angle corresponding to the angle of said cutters 3. Said cutter-head is carried by said plate 8 with the lower edges of the cutters resting upon its slanting, angular face. The upper, cylindrical portion of said cutter-head is provided with two outwardly, horizontally extending, diametrically disposed pins 9, 9, to be engaged for the purpose of revolving said cutter-head. For the purpose of engaging said pins 9 and revolving said cutter-head a driving sleeve 10, Fig. 5, is provided which has as features thereof two vertically disposed slots 11 extending upwardly from its lower edge to receive said pins 9. The upper end of said sleeve 10 projects above said cutter head and its upper edge is provided with a plurality of downwardly-extending notches 12 for the reception of a bar 13 whereby the cutter head may be revolved.

The upper face of said plate 6 adjacent its periphery is provided with a concentric ledge 14 and keeper 15 which serve to support and centralize said sleeve 10.

hen a valve, as indicated in dotted lines in Fig. 2, is to be refaced, its stem 16 is inserted through the guide-socket 7 with its lower end projecting below said socket. A tubular feed screw 17, Fig. 7, is then connccted to the lower end of said stem by the insertion of said stem into the hole of said screw and then screwing up the lever 18 so that its inner point bears against said stem 16 and firmly clamps the same nonrevo-lubly within said screw. A tubular feed-nut 19, Fig. 6, is applied to said screw with its upper end in contact with the lower end of said guide-socket 7. By turning said feed-11ut so as to exert a downward pull. upon said stem, the valve, which is shown in dotted lines in Fig. 2 will be actuated into facing relation to upper, cutting edges of the cutters 3 of said cutter-head.

vlVhen the cutting or facing operation is in progress, the lever 18 is, in this case, permitted to rest against any suitable stop, as a pin 20 secured to the work-bench 5, to prevent the valve from being turned by the action of the cutters.

Any desired or necessary amount of metal may be removed from the valve in the facing operation by a suitable actuation of the feed nut 19.

The centering ring 8, in the case illustrated in Fig. 2, turns with the cutter-head.

Fig. 8 illustrates the way in which my improved facing tool is used when both the valve and its seat are simultaneously faced.

In this case the guide-ring 8 is dispensed with and its place is taken by the valve seat 21 of the motor cylinder 22. Also the guide socketis dispensed with and its place is taken and its function performed by the valve-stem guide 23. In this case the lever 18 is stopped against the outer wall of the cylinder to prevent the valve from turning as it is being faced oil.

in Fig. 9 is shown a feed-actuating device which substituted for a valve and its stem when a seat only is being faced. In this device the disc 24 is revolubly mounted upon, the stem 25: this device occupies the same position as does the valve shown in Fig. 8, and the feed-screw 17 is attached to it and actuated as in Fig. 8: when the cutter-head is turned to face the seat, disc 21- turns with it.

I claim the following:

1. A valve facing and reseating tool comprising in combination, a cylindrical, revoluble cutter-head having one end thereof, formed into converging walls disposed at an angle to the axis of said head corresponding to the angle of the seating face of a valve, cutters carried by said converging walls adapted to reface said seating face of said valve, a guide-ring upon which the lower face of said converging walls seats, a horizontally-disposed plate, upon the upper face of which said guide-ring revolubly seats, a guide socket formed integrally with said plate for the reception of the stem of a valve to be faced, means actuating said valve into facing relation to said cutters and non-revolubly retaining same in said relation, and means for revolving said cutter head to cause its facing action upon said valve.

2. A valve facing and reseating tool comprising in combination, a cylindrical, revoluble cutter-head having one of its ends formed into converging walls disposed at an angle to the axis ofthe cylinder corresponding to the angle of the seat for a valve and to the face of said valve which seats upon said seat, cutters carried by said eonverging walls having upper and lower cutting edges whereby a valve seat and a cooperating valve may be simultaneously faced, a guide for the stem of said valve, 162L118 arranged to actuate said valve into facing relation to said cutters and said cutter-head into facing relation to said seat, means non-revolubly retaining said valve in said relation, and means for revolving said head to cause said facing operation of said cutters.

In testimony whereof I affix my signature in presence of two witnesses.

HARRY J. FINCH.

Witnesses FRANK LOBANDGER, CLARENCE Moons.

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