US1879024A - Valve jack or prop - Google Patents

Description

Sept. 27, 1932. E. J. BARTO, JR

VALVE JACK OR PROP Filed Aug. 5, 1951 gmentoe lah/ard nswrgaz 5 Patented Sept. 27, 1932 UNIT EDSTATE S EDWARD J. BARTO, in, 013 LANCASTER, PENNSYLVANIA, Assrenon T0 K-n- MANUFAC- TUBING COMPANY, A COIPARTNERSHIP COMPOSED OF HARRY wi KULP AND MART-IN C. DELLINGER, ALL OF LANCASTER, PENNSYLVANIA VALVE JACK-on PROP Application filed August 3, 1931. Serial m5. 554,928.

This invention relates to valve jacks or props for use in connection with the replacement or reassembly of the valve and associated parts after the grinding of the valves or after any operation in which the valves are, or a valve is, removed.

In one make of automobile now in very wide use in this country thevalve-stems of the internal combustion, engine thereof are formed with enlarged. or mushroom type lower ends and in order that. they may beremoved and the valve separated from :all'

other parts, the valve guide is madeiarge enough in internal diameter to permit the :7 withdrawaltherethrough of said enlarged lower endof the valve-stem and a split bush lng comprisingtwo semi-cylindrical cooperating, members in operative assembly is positioned in the valve guide and: receives the intervening portion of thevalve-stem between the opposed concave semi-circular.

faces of said members, said bushing members being provided with laterally extendlng shoulders or flanges or means to engage the l lower end of the valve guide and limit the up-v ward movement of said bushing members.

Of course, it is to be borne in mind that the present day internal combustion engine as found in the usual automobile is of multii cylinder construction, being of four cylinders or more and each fourcycle engineof the poppet valve type has at least two poppet valves for each cylinder. In connection with the task of grinding the valves: it'is usual -l practice now, in the interest of efliciency to perform each step or operationas to all of the valves of theengine before taking up the next step as to any of the valves, that is to say, first all "the valve springs are lifted and theusualretaining means removed and, in the construction of engine particularly inmind, the valve springs are removed allas onestep or operation; as the next step, all ofthe valve guide bushings are removed; next, the valves 12 are ground; next, allof the valve guide bushings are'replaced and next, and as a single step, allof the valve springs are replaced and the retaining means therefor placed. on the valve stems. V r

By following the. above procedure it is only the preferred embodiment ;of my cleaned up and freed from-gummy oiland carbon incidenttothe valve grinding operation, when the valve guide'bushings were replaced about theevalve-stem and shoved up into the valve guide, they would dropout of position and-so could-not all be replaced as a single step before commencing. the stepof reinserting the springs, andthis fact has resulted in loss of time and efliciency; I

The present invention has been developed with'the foregoing considerations in "mind and withthe view of providing means to prevent the valveguide bushings from dropping out. of position after they. have once been replaced. g v I I In thisapplication-I- show and'descri be 1nvention simplyby-way ofillu stration .of the practice thereof,aas by law required However, I recognize that myinventionjiscapable iofother. and different embodiments and that theseveral details thereof may be m'odi-T fied in various ways, all without: departing from; my saidinvention. Therefore, the

drawing and description herein are toibe considered as merely illustrative and not as exclusive. I" f I In the accompanying drawing: Figure 1 represents "a sectional view througha fragmentary portion of anengine.

block showing a valveestem with its head and foot and'the-valve guide bushing in eleg' vation, andfa valve prop or jackembodying my inventionoperatively applied about the valve- 'stem.fandbetween the valve head and the top of the engine block, the dotted line position ofthe valve guide bushing illustrate ing the lowest position. toiwhich it is per-. mittedtodrop by the enlarged lowe'rend of the valve-stem .when my invention i em-.

rows and ployed to hold the valve-stem in raised posi- In use the foot or base 2 will restupon the tion; top of the engine block A and extend over. a Figure 2, a sectional viewon'the line 2-2 small portion of the corresponding port B of Fig. 1, looking in the 'directionof the arwith the stop flange 1 extending down into, I v and engaging with its side edges, the inner Figure 3, a perspective view of the ack or wall of the port 13. so as to prevent any sliding prop of my invention by itself. p v or skating of the j ackor prop as a whole on In the accompanying drawing in all views the top of the engine block.

the device has been drawn toactual full-size Also, this construction of the foot 2 and scale of a commercial embodiment of the flange l'per mits-the'jack'or prop to be easily jack or prop which has been in actual use" rocked backward in aradially outward-direc- With very satisfactory results. Also in all tion with respect to the valve-stem E by a of said views all parts of the valve, that is"'fingerpull or pressure on the upper extension the valve head, stem and foot, and also the 6 soas to quicklyand easily pull the arms 4 valve guide bushing, the'bore of the valve from about the valve-stem and move the jack guideand the-valve port haveqbeen made or prop'out of position wherein it otherwise to actual full-size scaleasfound in thepreswould interfere with the dropping down of ent Model AFord passenger car- There has the valve when desired. r been no attempt in the drawing to make the The distance between the lower face of the thickness of the walls. or portions of the enfoot or base 2 and the upper edges of the arms gine block to any definite scale. p 4, or more accurately speaking, between the ,In the accompanying drawing; A desiglower face of the baseof foot 1 and'the-npnates generally, the engine block B, one of permost operative portionof the concaveand the usual :valve port's; C, one of the usual inclined.cooperating jaws 5Willbe so. calcuval-ve guides 1), oneof-the usual split valve lated with relation to the lengthof'the cylin guide bushingsuhaving annu'larly extending drical portionzof stem E, with.relation to the radially disposed stop flanges or shoulders length of valve guide bushing D, andwith re d, thesaidtwo semi-cylindrical members of lation to the lengthof the bore ofguideiC, said bushing. having cooperating opposed that when the jack-or prop is op'eratively'ap semi-circular inner faces together snugly plied between the valve'head and the top of 'slidably receivingbetween them the valvethe'cylinder block A with the jaws 5 about stem E; F designates the. usual valve head the stem E, the valve guidebushingD may and G the enlarged or mushroomedlower end drop down until .its lower end engages andis ofthe valve-stem; The valve guide bushing stopped by the upper portion of the enlarged elements D- are shoved upward about the or mushroomed lower end ('Jr ofthe r-valvevalve-stem E and in-the .valve guideLG until stem and in such position the semi-cylindrithe flanges or-shoulders dstrike'against the cal portions-of the cooperating elements of lower end of said valve guide E' and n0 r-I said bushing D,'together making up a cylin-- mally under operative conditions are held 1n drical surface, will still extendintothe bore suchposition bytheupperendof the valve of the guide 10 which will confine said elespring, not shown, which bears against the ments in a radial direction so th'atthey "canlower faces of'the shoulders (Z, J 1 not spread to passfurther down beyond said All of the constructionand features de: enlarged end portionG. scribed: in the immediately preceding vpara v The prop or jack will preferably be made graph are old and well known as embodied of asuitable gage or thickness of sheet metal; in the Model'A F0rd 'aut-omobile and form will preferably be made of sheet metal hav-' nopart of mypreserit inventiombut arethus: ing some resiliency so asto" give a certainbriefly referred to -1 in" order. to promote a springiness to the legs or arms or fingers; will quicker andmore intelligent =understanding f blyb f a i l i t l ie f ofmy invention. j J metal as to each embodiment; and preferably The l p p of y P F lnv'entlon will be of such constructionas to readily lend in its t p la f d Q L l 'Q O a Pr fitself to large quantity production by simple m y shee me I Q g havlng a t 'sheetmetal stamping operations. I C l y dlsp-osedlbody Portlon or P However,- it is not essential that the inveniingers iprefe'rably having their free 'end erally horizontally disposed or extending base or footQ; a stop flange 1 extending vertically downward fromthe extreme end of the. footer base'2; a pair of substantially hor1:-- z on'ta'lly disposed opposed resilient arms or portions formed with opposed cooperating arcuate jaw portions 5 and, g referably,- an upward eXtension-Gof'the body portion to facilitate the readyremoval ofthe' jack or prop from operative'pos'ition.

tion shall be embodied in resilient sheet met- 2a,} or in sheet metal or inmetal, or that it shall be resilient,nor is theexactform of great importance, it sufficing, considering my inventionin its broader aspects, if the em bodiment; of the invention be of such. (1011-. struction that it, will function to fllOlCl the valve+stem raised to. such a point that-the split bushing D as confined by the guide C willbe preventedbythe'enlargedor mushisraqae roomed end G of the valve-stem from dropping out of the guide C;

Preferably the arcuate opposed jaws 5 are inclined tothe vertical, so as to flare upwardly and outwardly, the degree of flare c0rrespon'ding approximately to the opposed face of the portion defining the junction of the head F and stem E, about which portion said jaws 5 are applied in use. The yielding grip of said jaws 5 serves as a stop to prevent unintentional movement of all portions of the ack or prop in a direction radial with relation to the corresponding stem E.

Having thus described my invention, what I claim as new and desire to secure by United States Letters Patent is:

1. A valve jack for use in connection with lnternal combustion engmes having valve stems with mushroom-type or enlarged low-.

er end portions, cooperating valve stem guides respectively formed with cylindrical bores, and split valve guide bushings respectively each composed of a pair of cooperating members together having a compo site cylindrical external face portion adapted to be shoved endwise into their respective guide and to make a snug fitin the cylindrical bore thereof and to make a snug sliding fit about the medial portion of the corresponding valve-stem, said jack consisting of a resilient integral sheet metal piece formed with a vertical post; a pair of resilient arms extending substantially perpendicular to said post and formed with cooperating opposed arcuate upwardly outwardly flaring aw portions adjacent their respective free end portions, said jaws being adapted to yieldingly clamp about a valve-stem and to receive and support the upwardly out wardly flaring portion of said stem defining the junction between the valve head and stem; a base extending from the lower portion of said post in the same direction as, and substantially parallel to, and below, said arms and adapted to rest on the top of the engine block adjacent to, and partially ex-v tending over, a valve port opening; and a substantially vertical flange substantially of the same width as, and extending downward from the free end portion of, said base and adapted to engage with its side edges the adjacent portions of the inner wall of said valve port opening to prevent radially outward movement of said base with relation to the valve port opening beyond a certain point and also to prevent sliding movement of the jack on the engine block; the'distance, in a direction parallel to said post, between the bottom face of said base and the operative or supporting faces of said jaws being such,

in relation to, the length of said valve-stem; the length of said guide, the length'of said bushing, and the length of the cylindrical portion of said bushing, that when the jack has been operatively positioned with its jaws embracing and supporting the upper portion of the valve stemand with its base resting on the top of the engine block and when the bushing has dropped dOWlLOIllZllG stem un til the lower endof said bushing engages and isstopped by theupp'er part of the enlarged lower end portion of the valve stem, a part of the cylindrical portion of said bushing will extend within the cylindrical bore of said guide which snugly embraces-the members ofsaid bushing and confines them, thus end portions, cooperating valve stem guides respectively formed with cylindrical bores, and split valve guide bushings respectively each composed of a pair of'cooperating memhere together having a compositecylindrical external face portion adapted to .be shoved. endwise into their respective guide and to make a snug fit, in the cylindrical bore thereof and to make a snug sl ding fit about the medial portion of the cor responding valve-stem, said jack consisting of a vertical post; a pair of resilient arms extending substantially parallel to each other and in a plane substantially perpendicular to said post and formed w th cooperating opposed arcuate jaw portrons ad acent theirrespective free end portions, said jaws being adapted 'to .yieldingly clamp about a-valve-stem a base extending from the lower portion of said post in the same direction as, and substantially parallel to, and below, said arms andadapted to rest ma a on the top of theengineiblock adjacentto,

and, partially extending over, a valve port opening; and a substantially vertical flange substantially of the same width as, and extending downwardfrom the free end por tion of, saidbase and adapted to engage with its side edges the adjacent portions of the inner wall of said valve port opening to prevent radially outward movement of said base with relation to the valve port opening beyond acertain point and also to prevent sliding movement of the jack on the engine block the dis'tance,-in a direction parallel to said post, between the'bottom face of. said base and the operative or supporting faces of said said valve-stem, the length of said guide, the

tively positioned with its jaws embracthe valve stem and with its base resting on the top of the engine block and when thebushing has dropped down on the stem until the lower jaws being such, in relation to the" length of mg and supporting the upper portion of i length of said bushing, and the length of the cylindrical portion of said bush ing, that when the jack has been operaend of said bushing engages and is stopped by the upperpart ofthe enlarged lower end portion of the valve-stern, a part of the cylindrical portion of said bushing will extend within the cylindrical bore of said guide which snugly embraces themembers of said bushing and confines them, thus preventing any radial separation thereof such as would be necessary for them to pass over anddown ward beyond the enlarged lower end of the valve stem.

3. A valve jack for use in Connection with internal combustion engines having valve v stems with inushroom-ty'pe'or enlarged lower end portions, said jack comprising a vertical post; a pair of resilient arms extending substantially parallel to eachother and in a plane 'operatively straddling the valve-stem; a base substantially perpendicular'to said postand extendingfrom the lower portion of said post and adapted to rest on'the top of the engine block adjacent to a valveport open- 1 ing; and a flange extending downward from sald'base and adapted to engage an ad acent portion 'oi'the inner wall of said valve'port opening; the distance, in a direction parallel to said post, between the bottomface of said base and the supporting faces of said arms being such, in relation to the length of said valve stem, the length of the guide, the length of said bushing, and the length'of the cylin-V drical portion of said bushing, that when the jack has been operatively positioned and A .u when the bushing has dropped down on the stem until the'lower end of said bushing engages and is stopped by the upper part of the enlarged lower end portion of the valve stem, a part of the cylindrical portion of said bushing will extend within the cylindrical bore of said guide.

In testimony whereof, I have signedmy name to this specification at Lancaster, Pennsylvania this 29th day of July, 1981."

' EDWARD J BARTO, J

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