US1616498A - Valve reseater - Google Patents

Description

` 1,616,498 Feb- 8 1927' w. M. HowsER VALVE RESEATER v Filed July 1, 1925 2- Sheets-Sheet l w. M. HowsER Feb. 8, 1927.

VALVE RESEATER Filed July l, 1925 2 Sheets-Sheet 2 #V0/fel HOL() 619/, 31u/muro@ Patented Feb.- 8, 1927.

UNITED serres WALTER ZM. HOWSER, F HAMMOND, INDIANA..

VALVE BESEATEB.

application sled' July 1, 1925. serial No. 40,910.

This linvention appertains `to tools and the guide sleeve for the valve, so as to efectively hold the pilot or self-centering mandrel against movement and in correct axial alinement with the valveseat.

A further object of 'the invention is the provisionl of a novel sleeve for receiving the refacing tool, so as to prevent play or lost movement of the sleeve radially on the pilot or self-centering mandrel.

A further object of the invention is to 2L provide novel means for connecting the refacing tool with the said sleeve, so that the same can be readily removed to allow a number of different types of tools to be associated with the sleeve. fh) A still further object ofthe invention is to provide a novelvalve reseater of the improved character, which will permit then refacing' of, valve seats in an expeditious and highly satisfactory manner. v

With these and other objects in view, the invention consists in the novel construction, arrangeiment and formation of parts, as willbe 'hereinafter more specifically claimed, described, and illustrated in the ac:- companying drawings, in which drawings: Fig-ure 1 is a side elevation of the improved tool showing the same in use,

Figure 2 is a longitudinal section through the tool showing the pilot in elevation,

proved device,

Figure 4 is a detail horizontal section faken on the line 4 4 of Figure 2 looking .n the. direction of the ar-rows lshowing the -fleeve and mandrel or pilot in section illustrating the novel formation of the sleeve to eliminate lost motion,

Figure 5 is a detail horizontal section taken on the line 5-5 of Figure 2 looking M inthe direction of the arrows through the Figure-3 is a top plan view of the imupper end of n the sleeve, illustrating the formation of the sleeve, e

Figure l6' is a detail section; through the pilot or self-centering mandrel taken on the line 6 6 of Figure 2 looking in the direction of the arrows, showing the locking means for the lower end of the saidmandrel or pilot in plan, and v 4 l Figure 7 is a detail sectionthrough the pilot taken on the line 7,7 of Figure 2 showing the crossv sectional configuration of the pilot for engaging the upper end ofthe valve ide to facilitate the centering of the. said pllot or mandrel,

Figure 8 is a view similar to Figure 2 70 taken on a smaller scale showing the screw\ feed head and` cutting,tool-connectedwith the mandrel to bore out theivalve port holes,

Figure 49 is atop plan view ofthe same,

Figure 10 is a detail section takenl on the 75 line 10-10 of Figure 8 looking in the direction of the arrows, l

Figure 11 is a detail perspective view of one of the cutting blades, A

Figure 12 is a detail perspective view of the operating handle for the boring tool.

Referring to the drawings in detail, wherein similar reference characters designate corresponding parts, throughout the several views, the letter A generally indicatesY thev improved valve reseater and B a fragment of an; internal combustion engine with which the improved tool A can be associated.

The engine B can be ofthe usual or any preferred character and has simply been shown to illustrate the use of the tool. As disclosed the engine is provided with the, usual type of valve'seat 5 and guidel sleeve 6 for the valvestem (not shown).. When l the valve seat 5 is to be refaced, the valve 96 and valve stem are removed in the ordinary manner and the improved-tool A associated.'

-with the engine lin lieu thereof.

Thev imroved tool A comprises first a novel sel -centering mandrel or pilot 10 which is adapted to be inserted through the valveseat 5 and the valve guide seat 6. This novel 'pilot or self-centerin mandrel 10- includes anl upper cylindrica body portion v 11 and a lower smooth cylindrical shank 1N 12 which is adapted to extend into the' valve sleeve 6. The shank 12 is connected withthe bodyr 11 by a tapered portion 13 which is rovldedl at ui-distantly spaced pointsu .g mgl extension l carries novelmeans 17for enlus aging the lower end of the valve guide 6 or cooperating with the tapered portion 13 of the pilot or self` centering, mandrel 10 and this means embodies a hollow cone 18 slidably mounted upon said extension, and which acts in the nature of a wedge. It `is preferred to provide recesses 19 at spaced points on the outer face of the conecasing to provide ribs 20 for engaging the inner face of the lower end to. said valve guide of'l the engine and these ribs define sharp longitudinally extending edges for engaging the said sleeves in order to positively center the -mandrel or pilot in place. The cone 1.8 is adapted to be moved into and out of locking posit'on by-means of anut 21 which is threaded upon the thread 16 of the exten-v sion 15 and the upper face of the nut is provided with a recess 22 for receiving ahead 23 formed on the lower end of the cone. If' desired the upper en'd of thewall of the recess 22 can be upsetas at24 so as to hold the head in position. The head is of annular construction and permits free rotation of the nut relative to the cone, while at the same time sliding the cone into and outof locking engagement with the sleeve.

The improved novel tool carrying sleev of the device is indicated by the reference character 25 and at va point spaced from its upper and'lower ends is provided with annular ribs 26 and 2 7 the outer faces of which can be serrated or -otherwise roughened.4 The portion of the to'ol carryingl sleeve between the annular'ribs 26 and 27-is provided with diametrically oppositely longitudinal ribs 28 andA 29 which can be sprung into and out o`f intimate contact lwith 4the body portion 11 of the mandrel to take up any lost play and screws 32 arethreaded through the slit portion of the ribs 28 and 29 in order to adjust the sectionsv 3l. The upper and lower ends of the slits or slots 30-communi cate with oppositely directed semi-circularl slots 33 which end slightly short of the oppositeribs in order to provide connecting portions 35 and thereby prevent the entire separation of said sections'il. It preferred the slots 30 and the 'semi-circular slots33 can be packed with cork or some other` suitable compressible material 36 as shown.

The extreme upper endr of the sleeve 25 is provided with a polygonal shaped head 37 inorder to permit a wrench to be as socia'ted therewith, whereby the sleeve 25 can be'rota'ted on the pilot, for a purpose, which will be hereinafter more fully described. The lower end'of the sleeve below the annular rib or collar 27 is provided with a' vIt is obvious that the Lemmon per and lower ends of the bore are enlarged and vtapered as at 41 to provide seats for engaging the -tapered portion 39 of the sleeve. One end of the cutter 40, which is of annular construction, is provided with cutting teeth 42 arranged at an angle to the longitudinal axis of the sleeve or'providing the beveled valve seat. The opposite face of the cutter can be provided With teeth 43 all arranged in a horizontal plane for .smoothing off the upper face of the valve seat when the same is'chipped or otherwise mutilated. osition 'of the cutter can be readily reverse on the threaded extension 28 so as to bring either the teeth 42 orthe teeth' 43 into pla In' use of the improved-device, after 'the valve vand valve lsteinhave been removed from the enginethe pilot 10 is inserted through the valve seat into the valve sleeve l6 until the conical portion 13 of the pilot engages the upper edge of the said valve guide stem sleeve. in position and is effectively centered by the use of the cone 18. The desired tool 40 is 'associated with the lower end of the valve tool carrying sleeve .25 and the sleeve 25 is then slid on the body portion ofthe pilot. A suitable wrench can now be applied'to the sleeve and the sleeve turned until the seat has been .refaced Owing to the construction. of the tool carrying` sleevel and the fact that the mandrel or pilot l0 is correctly centered, the valve will be refaced true and. thus proper seating of the valve is positively insured. l

Attention is also invited to the threaded extension 45 formed on the upper end of the pilot o r self-centering mandrel 10 4and this extension isprovided with a diametrically extending key way 46. This extension and key way is used, when it .is desired to lock a different type of tool carrying sleeveor screw feed head 47 to the mandrel 'for vboring out the valve port holes true. This screw feed head 47 is provided with a smooth cylindrical bore 48 for 'fitting on theupper end of the mandrel and the extreme upper Aend of the bore is provided with a threaded' socket `4).,1for receiving the threaded extenlsion 45 of the said mandrel.

A key 50 is The pilot is now locked' employed for locking the feed head to the mandrel and the ke [its in the keyway 46. Thevouterface of t e head 47 is provided with feed screw threads 51 throughout its entire length and has threaded thereonthe novel boring-tool 52which will now be de-y tension 57 for receiving an operating handle or crankl 58. The tool is 'applied to the engine in the same manner as the tool heretobefore described and it can be seen that as lthe/collar 53 is rotated that the same 4will be .fed down bythe screw threads,

which will effectively true the valve port holes..A v l- Changes in details may be made Without departing. from the spirit or scope of this invention, but:

y'What I claim as new is:

1. vIn. a valve resurfacing-tool, the com-I binati'bn with a self-centering mandrel embodying a cylindrical body portion having`1 ltatable and slidable tool carrying sleeve fita reduced cylindrical extension formedl on the-Ilowerfend of the body portion, and

' ay tool" carried by the' body portion, Vthefupper end vof said reduced extension being providedwith a taperedcentering bearing portion for engaging the upper end of a valve guide stem sleeve, the surface of said tapered bearing portion provided at spaced 'points with fiat plain faces'defining longitudinal edges for biting contact with said valve guideistem sleeve, of a centering cone slidably mounted upon the lower end of the extension .for engaging the lower end of said valve guide stem sleeve,V the outer face lof the `cone being provided at spaced points with longitudinally extending ribs defining longitudinally extending edges for biting Contact with said valve guide stem, and a nut rotatably carried bythe lower end of the centering cone and threaded upon said extension.

2. In a valve resurfacing tool, a self-cena tering mandrel including a body portion adapted to extend axially through a valve seat, and a reduced extension adapted to extend through `a valve stem guide sleeve,

means for lockingthemandrel in a centered position in said'v valve stem guide sleeve, a tool carrying sleeve rotatably and slidably mounted upon Said body portion of the mandrel including a main portion having annular collars formed thereon adjacent to the upper and lower .end thereof, the main portion being provided with longitudinally extending ribs provided with longitudinally extending slots, the collars be- 1ng provided with oppositely directed semicircular slots communicating therewith, a com'pressible member fitted in said slots, take-up means extending through the ribs, a wrench engaging member formed on the upper end of the sleeve, and a tool detachl ably fitted on said sleeve below the lowermost collar.

3. In a valve resurfacing tool, a self-centering mandrel including a cylindrical body 'zov portion and a reduced extension adapted to extend throu h a valve stem guide sleeve, means for lockmg and centering the mandrel against movement in said sleeve, a roted l upon the body portion of the rmandrel including a -main body portion having annular collars formed thereiny adjacent to the upper and lower ends thereof, and longitudinally extending ribs connecting said a threaded bore for receiving said' threaded ,95 i tapered for engaging said tapered face and extension having the opposite ends thereof provided with cutting teeth of different types. l

In testimony whereof I affix mv si nature.

WALTER M. Ho SER.

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