US2051313A - Valve attachment - Google Patents

Description

S. E. OLENICK VAN/E ATTACHMENT Aug. 18, 1936.

Filed Aug. 14, 1955 frz/672%? /S/eme v f7@ if@ QQ. 7%@ H? Patented Aug. 1.8, 1.936

PATE-NT Ao1=1=1c11 t 2,051,313 VALVE ATTACHMENT Steve E. Olenick, Chicago, Ill., assignor to Boyle Motor Products Company, Chicago, Ill., a corporation of Illinois Application August 14,

1933, serial No. 684,961

' 4 Claims. (Cl. 12S-90)" This vinvention isparticularly applicableto internal combustion engines having overhead valves or valves operated by means of rocker arms. In the more common formsv of construction, the

5V rocker arms engage directly with the tops of the valve stems. The Valve stems are conned to a vertical or rectilinear movement while the end of the rockerl arxn a circular or pendular movement. As a conse uence there is a constant 1I)r tendency of the rocker arm to push or draw the end of -thestem away from its axial movement with the result that the engaging portion of the rocker arm is frequently worn to a considerable degreewhich accentuates the thrust and often 15, the end ofthe valve stem is likewise worn, the relative wear depending upon the character of the two metals. Y l .A lI have also found that in many automobile engines the lubricating oil is carried out to the end of' the rocker arm and ows down over the valve stem. While thisV is not objectionable` for the intake valves, it is frequently exceedingly objectionable forl the exhaust valves as the oil will tend to bake or harden on the hot valve stems thereby causing them to stick in the guides.

The objects of the present invention are particularly to provide means for overcoming the objectionable features above noted and particularly to provide a side thrust eliminator for overhead valves. Other objects are to provide simple and eiiicient attachments or devices which may be readily applied in the manufacture of an engine or which may be utilized in connection with va-V rious types of engines having overhead valves; to

provide a simple and efficient means for eliminating side thrust on valve stems and guides on overhead valve motors; to provide a universal joint or connection between the rocker arm and the valve stem to permit the valve stem to travel through the center of the guide; to provide an attachment which may be applied without change in the rocker arm; to provide means for directing the oil away from the top of the valve stem oi an exhaust valve; and to provide such other novel features and advantages as will appear from the following description.

In the accompanying drawing illustrating this invention:

Figure 1 is a sectional view illustrating a valve and rocker arm with one form of my attachment applied thereto;

Figure 2 is a view similar to Figure 1 with parts broken away and showing a modied form of construction; and 55 Figures 3, 4, 5 and 6 are detail views showing further modifications or different embodiments of thel invention.

In the arrangement shown in Figure l, 'l represents a portion of an overhead valve engine body having a valve stern lguide 8. The valve 9 has a 5 stem I0 which projects upwardly through the guide and is held in normally closed position by the usual spring II which is connected with the stem I0 by means of my improved tension equalizer or spring retainer I2. YThis equalizer has a 10 spring engaging portion with a substantially conical 'centerA which engages With a tapered collar VI 3 which in turn Vembraces the sections of split annular key I4 which fits in a groove I5 inthe stem. While Vthere usually is some space between 15 A the ends of the sections oi the split key I4, it will be noted that the collar or bushing I3 fits tightly in the conical spring retainer I2.

The valve is adapted to be actuated by any suitable rocker arm as indicated at I6, the curved 20 end or contact portion of which is normally engaged withthe valve stem. The rocker arm is shown as beingapivoted Vonfa shaft I8 and is actuated by a'push rod I9r in the usual manner.

In order to avoid the side thrust above referred 25 to, I provide a cap 20 which fits closely over the upper end of the stem III, the top of the cap being pointed or provided with a conical engaging surface 2l. A second cap or anged disc 22 is interposed between the cap 20 and the end I1 of 30 the rocker arm. The under surface of this cap is preferably dished or conical but at a less angle than the cone 2I so that it will tend to remain centralized thereon but at the same time may rock freely thereon. The outer flange or rim 23 35 projects downwardly over the cap 20 and prevents the disc or thimble 22 from being disengaged.

It will be particularly noted that the disc or thimble 22 is of larger diameter than the sleeve 40 or ring I3 so that anykoil passing from the end of the rocker arm will be deflected outwardly over the sleeve and thus be prevented from running down on the valve stern. Although this ar-r rangement is intended particularly for exhaust 45 valves, the cap 22 may be reduced in size for intake valves so that the oil may pass down along the valve stem in the usual manner.

In the modiiied form of construction shown in Figure 2, which is particularly intended for use 50 in the manufacture of new engines or new installations, the valve stern 24 has a conical upper end 25 which serves as a bearing for the conical under surface of the disc or cap 26 which is 55 interposed betweenV the same and the end I1 of the rocker arm.VV Q

The arrangement shown in'Figure 3 includes a valveA stem VZ'Irhaving a beveled or chamfered upper end 28. annular beveled portion 30 which rests on the beveled end'28'soras to make a sliding or rocking contact between the cap and the sleeve so that thecap will rock or move relatively to the stem Vdue' to the action ofthe Contact portion of "the rocker arm.

recess 33. The. auxiliary cap or thimble 34 hasra projection 35 tting in the recess 33V wlnerebyv a knife or point contact Vis made so that the auxilswing freelyronthe end of the I6 actuates the same. Y

with a central protuberanceor bearing 38 which eng-ages with'a'recessl!) in theauxiliary Cant: 'Ifhe arrangementV shown in Figure-dnas a'stem f4lwith .a holefor recess 42 for receiving'a ball V43 whichY engages with-a recess 44V ina capV or thim-ble 45 which is interposed between the ball andthe Yrocker arm as -shown.-

'it WinV be noted, that with Vau the different forms shown, t'herocking or vibration Vofl the k'rocker armiwill be transmitted to the Valve stem through means providing Va substantially universal joint `whereby*-tlieyalve stem may move freely up andl down withoutany appreciable side thrust: This will minimize-orr obviate the lateral binding Y andlwear Y'of the stems'and 'guides so lthat the andthe':inter-positionV of the correctly on the valve seats.

valves will alwaysigbe in -propernpositiong tofseat arrangement a large Vamount of! the troubles'inf herentV in overhead' valve engines will be avoided auxiliary capV or c'apsgwill` further tend to preventnoise as well as 'to prevent Wear `on theVV end vof" the stemand the .enactingV part of'therocker` arm. While I have illustrated aj numbergof forms *ofj my invention it Vfollowing claims, in which @named cap.

By means of this will be observed that other changes or provisions may be made to adapt the same Vfor diterent types of engines and therefore I do not wish to be limited to the particular arrangement herein I claim: i V

1. The combination with the usual valve stemandl rocker arm of an engine, of a cap engaging with the end `of a valve stem and having a con- 10 y Y Y* verging Yupper surface,V and an auxiliary Vcap 1- The valve stem 3l Vshown in Figurel i has a. Y cap 32 tting over theend thereof withacentralr adapted to engage with the first named cap and with the contact Vend of the rocker arm, said auxiliary cap being adapted to reckon the rst 2. The combination with a vertical valve'stem Y, and its actuating rocker arm, of a caprengaging with the upper end of the valve stem Vand having'Y a conical upper surface, a thimble between the capand the' rocker arm, said ythimblehavingv a 2 conicalg'lewer `Vsllrfaee;the thimble being of suflieiently` large diameter Vtefrliiect oil away from the valvestem Va -sui'cientfdistace so that theioilf willV not run-downlthe same,l ff' 5"* 1 'f f 3. The combination with the'usualfvalve stem 25 andJ rockerarm of yafnengine, cfa pair of cacting elements adapted to; be Vinserted vlmetween theste'm and the` arm inY operatlvejposltionf, one of saidV n elements comprising a capflttingclosely overthe end ofthe-stemma theo/ther element comprising 30V anauxilia-ry cap havingiroeking contact with fthe rst named cap;v thefsidesl ofY said auxiliary -cap extending` downwardly asuicient distancefto maintain -thes'aine in positiongfandjtheton'being 'V Y ila-t for engagement"withtherrocker arm.. 3h75'`V 4. The eummm-tion-v with aniengmeynavinga valve `stem and a rocker` arm coactingiw-ith the and -a secon-d cap-:engaging with the rockerarmV in alignment with thestenfr andicoa-cti'ng Ywit'lrthe 40 first named cap andprovitling relative movement therebetween.

' *MSTEVE E. GLEN-IGK@ speciied` in the 5 'e

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