claim: 1. The combinatioli ivitli a c@,lilider and a, piston operatiii-- in the cyliiider, which Oil is prov]Lded witli a piston i-ing groove 75 ivitli openiligs exteiidiii(y tlirouoh the on at the back of the groon-e, of a split lig mounted interioi-ly of the pist on i@ing iilounte(I in the groove and bevele(I face therein, LLnd projec- 80 t ied by the split resilient rin ex9 teiidiii tlirough t,he opeiiinos in said pis9 ton and engagiii(y said bevefed face of the piston ring. 2. The combinat oii ivith a cylinder and 85 a pistoii operating iii the cylinder, Avhicli piston is provided Ni,itli a piston ring gro-ove aiid in,,ith openirl(ys extendiiig tlirougn the pistoit at the back of the (yroove of a split i-esilleiit 1-in(y motinted interioi-ly of the pis- i)o toii, a piston riiig mounted in the groove and liav'ng a beveled face therein and projections cari@ied bythe split resilient riii0l extn ten(Iiiig tlirou(y'li the openino-,s iii said piston aiid cii(raging said beveled I-ace of the Pis- 95 toii saict ring liaving depressions in the eaele ace thereof in wh el-i certain of said projections engage. 3. The coiiibination witli a cylinder and a piston tlierein, whicli piston is provided 100 -Nvitli a Distoii i-ino@ oroove and -with opelain @n @f, gs extendi@(y throuall the piston at the back of the (yi,ooVe, 6f a resilient rin(y iiiountecl interiorly of the pistoii, a piston rinc, iflounted ivitliiii the (yroove ancl having a beveled face 105 therein aiid projectioiis tdjustably iilouiitod upoii the resilient ring extelidino, thr6ugli t-lie opeiiings and engagiiig the be eled face of the piston riiiy. 4. The coinbinatiori witli a cylinder -,iid a 110 piston operating thereiii, wliieh piston is provided with a piston ring groove a two I part piston ring mounted within the groove and comprising two annular sections one mounted on the otlier, an expanding resil- 115 ient ring mounted witliin the piston, saicl iston having openings extending throuch p 6 the back of the pistoii ring groove, said piston ring sections liaving be%,eled fa6es andprojections carried by the expand' inL, ring IN within the piston extending throuoh said open@ngs a,nd engaging the beveled ?a-ces of the ring sections. ELDREDGE H. PACKER.

Patented May 8, 1928. 11668977 9 @UNI,T ATJ@S PATE@NT Et@ E@D $T - OF@FIC ELI)URDOE H. PACK ,94, OF S N PR *,NC S CAL 1. CP . IFOA , IA I?ISTOW RING. 4L'pl)lication filed March 22, 1927. Serial No. 177,246. This ilivelitioii i,elates to illipi.-Ovellient ' s ip pisto:ri riiigs of the type disclosed in my @,,,I)I)Iicatioiis for patents fi'led Feb. 18, 1926, aii(I Nov. 3, 1926, resp,ectively and 'beail IN'os. 86,768 and 145,923. l@ this type of pistoii l@ino: tliei-e is provided a resilientexp@iidiiig inealis contained - within the liollo;N@ pisi6n, ivhlcli n-i@,,tns in6ludes a'series of proj'ections that exteiid throuigh openings in the wall of the piston into the pisto ri push )utward ah dowli-@va . r ring. The@present iiiventiol-I vision of @n imI)ro-"ed nieaiis f6 the pistoii ri 49 15 doAvyiAvard a(yainst the ottoiii of the ring g@loo@ve and ouiw,,ti-d against the cylinder Avail, wliieh iii(@@iis is of siiyiple and inexpensive eonsti-ucti6ii, ileliable in operation and capable of long 4nd efficient service@ An object of tl ie prese@t invention is t 0 vide for ,i siinple and easy iiistall',Itlon of 0 the device of I'lly invention on a, piston, it beilig otily necessary to drill plui,ality of 1101c,@; tlii,oii(yh the pisfoii wall into @oiie of tli6 2") I)istc,n j@ill- @Yl@oolTes aiid to provide a beveled facc, on tl-ie pistoii i-iiig itself iA order that the ]Pl@ojectioiis Wilicil exteiid ithi-ougli said opeiiiii(-s aiid are yieldino-ly urted outward t@ by a SPI'ill(Y, will en(y@(r@'said eveled 'face , @n @n ,tiid iiot only inove the piston ring outward laterally but foi-ce it dowliward iii tiglit engagellie,it witli the botton-i of the ring groove. 1,11 iiiy forinei@ applic-atioii Serial: No. 145,923, the Co-actijio, bevelecl fices causin(-y the pistoii .i 5 rii-ig :to bc, inoved donvnward were pr6vided ()ti tlle pistoii ind oii the pi-ojections, @ut in (Ilit@ pi@Gse@,iL iiiv(l@ition I pi-ovicle tilesle coa(@,tling,beN,eled faces oii the projections aiid oji the pistoii rin(r itself, tliereby eliminoting I? ormiiig OP .1@ 40 tl@-- necessity of f eni gs witn bevelecl faces in the piston. A f4rtiier object of the inveiit@ioii is to provicle a@Iji@@table @rp]ectio:n,s on a ST)iit ring to b6.n,6@inted iiisid@, tl-ie pistoiil, tlij @elative ' ;, @ing a@d projec45 movellient Deriiait@ted the i t,ip@ls insuring ari 'even application of t@e spi@]@ng pressul@e to the pi@toii @i@ig, tliore bel@ o , provided a.ii especial colistriietion to @Dre-%,ei@t@ihe ivorkilig @f these adjustabl.e jprojections out 0 f -pro@er p6sition. '@Tith tiie abo@le n-ieiitioiied and 4)tlier objects iii view, the invention colIsIsts@in@ tile, iiovel constructio nd coiiibiiiati6ii. Of parts liereinafter d6scribed illustrated in the aecompanyiiig dra-vvinz 3 , and set forth iii the claims hereto append@d, it being understood cliat val-iocis ellailges iii tlle fol@in, p.i-oportioii, size and minor d6tails of construction withiii @the scope of t,lie claiiiis iiiay @be resorted @to ivitliout cfepai@ting fi-oin tlie'spirit 0 sa r cri- -oo ficiiig aiiy 6f thetdNTinta,,Yes of the iiivention, -Pcefel-@ing to the drawi@g: Fig. I r6pi-esents a vertical sectiona.1 view of the pistoii slioiviiig p@ll-t of the cylinder tlierein and sbowing'tl@e ring of iny inven.- 65 t',on is it Ni,ould appear ivheii iiisidlied. repi-ese a e tional view taken F iits s c on the plane line 2-2,of Fil-,. 1. I Fi@(ly. 3 i@epi@esents a fi-agiiientary perspective i,iew of a ptti-t of a piston i,inLy., Fig. 4 i- resejits a ve'rtical se@tional view tikeii throLt(,Ii the piston rin(r Fi ig. )IT ll(?@,@.,( iits,a fi,agmelit4i-y ins@de'ele@7at fie pistoll rililr. Fio- () i@epi-eseiits a f@,tgiiiejitary sectional 63 IV 0 0 vie f tt iiiodified f rm of the iii'Vent (>n. Iii tilo eiiib6diiiient of the invelition shown iri theaccoil@ipaii3,iiig drliwin,), tl,te hollgw pistoil I is @iriotiiited iD the 6yliiider 2'in the tistial iiiaiinei, beiiig pi-ovidclcl ivitli rings 3 8o adjaceiit its uppei@ eiid aiid a (yi,oove 4 in the IOANer@ Oi@ sl@ii-t-, poi,tion tliei-eof. To adapt this pistoii for al)pl'cat'oii of the i@ing of tyiy tliel-eto, a pltiralit.,Y, foi@ eiam le I PI six, lioles iiidicated@ af 5 ai-e drilled horizont@lly tlll'OLI('11 tlle ",all of the piston into th iiii(, (,i-oove 4 Ai,liei-eby t-lie expaiidiiia me of iiiy iiii,eiition, gen(,,rally de ig@iiate(T 6, m@,ty b,,, iiistalled' to , C'D@,@age and plisli outw,,trd and doii-,iiward oii th@ i)i@toli @in(y 7. The iiieaiis 6 coinpi-ises a resilielit split i-iiio- 8- foi,jtiied of flat spi-ing steel, witli nor6verl@ipped ends. A plui-ality of clilis 9, for (,xample six tre itiouiited on this i-iii(, -o as t @e slidable tliercon and C,%rry 95 - 0 pf;@iii e pi@o ectioiis 10 lvliich extend Ilreely tllroii(yh the opeiiiiigs 5 aiio elig4 the back of the i@ing,7. These clips aiid projections be coi@isti-Licted iii aiay stiitable iiaanner pi-6vided,that they na,,ty De readily @lippe4 1(( (Y oiito the riii 8 alia will move or slide freely t,l)@,i,eo@ @et liold the projectiotis so that the7 will t"raiisiiiit the spi.-in,@ foi,ce' to the piston i-iii . g. Iii pi-actice I:IIG, liole@ 5 4re made suffi6i ei@tly' lai-ge to allow 105 rofi-oiii tl,le piston 1-ilig groo jection s 10 and ilito th6 iiite li p, olitei@ eii@is o@ are T f t@lie bevele d to co-operate ii7i@h It I)rovicied oil'tli(,, inile'r s on, I fit ring. The piston ring is Pr e an annular groove 12 oli its inner side and the

2 1,068,779 lower side 6f this (,,-ro6ve is n-lachiiied to proi,ide the beveled f ace 11. The pins beilig Li@ro,ecl outwardly by tlie, spi-in(y band 8 not only tend to f orce the ring 12 outward laterally btit due to the co-acting beveled face olti the i-iii(,, and piojections yieldiiigly liold the riiig closely ei-i(,,aged willi the bottoiii of the pistoii rin(r ci-oo-@,e By these ai,i-aiigezn zn ments, oil is pi@eATelitecl li,oiii -,vorkiiig up bc,- ii) tween the piston ring aiid cvliiicler tlid f roifi 1N,orking up ar,ouiid the b,@ck of the pistoii rinly betweeii the opl)osed faces of the rin(y andgroove. To prevent the slid@,bly !IIOLtllted projec15 tiolis froiii workinq out of pILice aiid eiigaging 'witli tlle I)iston ring at the joint, tlie projectioiis Avliieh are iiiotintecl on opposite sides of the joilit of the piston rin(y eiigage in depressioiis li') foriaiecl oii tlie- bc,@eled 20 faee 11. By allowin(, tlic, projectiong to zn move relative to the spriiig or vice versa the I expandin(r force of the sprin(y is applied @n zn evenly througliout the pi@-,toii rin(y a-nd the proper foi,einoof the i-iiig outvv@ird @iiid 25 downward is ilisured. B3, inakiii(, the boveled face on the iniier side of the piston ring insteacl of bevelin 1. the pistoli operl:,no-s tllrougli wliieh the projectioiis extelid the provision for the doivnward forcing of the 3u piston rino- is iiiacle iii a iiiore economical and better rnaniier, it beiii(y easier to provi(le n the bevel face on tlle piston i-iiig tiia@i@, iii the pistoll openiii(ys. The piston iiaay be proviclecl eircumferentially with aii oirl a3 groove 14 on its outer face and witli oinn'Wardly directed ducts or cliaiinels 15 per ll]Litting the oil to readily pass iiato and be retained iii said (,i@ooN,es The iiiodification of the iriveiition showii 4o in Fig. 6, is the saiiie as in the other foriii of tlle invention except as to the piston riD,,. There is provided the sai-iie type of split resilient i@in,, or baiid 16 havin(y clips 17 slidable thereon and pins 18 cari-ied by the 45 clips. The piiis extend throtigh openinos 19 in tl-ie -wall of the piston 20 ,ind eiig,,tge a sectional piston rilio, niade up of a lower seetion 21 and an upper sectioii 22. The ring section 21 is provided on its upper side with 60 a convex portion 23 enga-iii,,y in a V-sliaped n alinular groove 24 provided in the lower side of the section 22. On the lower side of the section 22 is a beveled face 25 correSI)onding to the beveled face 26 on tlle upper 55 side of the section 21. The pin is beveled or poihted so as to simultaneously engage both beveled faces. This transmits the s rin acti n to the ring so that the upper p 9 0 section is forced upwardly and the lower 6(i section downwardly while botli sections are forced out into engagement with the cylinder 27. This causes the piston ring to seat firmly azainst the upper and lower sides of the pist@'ii riii(,r groove, said ring beiiig vieldingly held in slich seating engagernen@ with 65 tlle groove. The advantages of this constriiction are t tioht fitting ring which will t? be yieldingly iiiaintained at all tii-nes in a I)osition to preveiit leakage of oil up past it and to iiisi-ire lioldino, the coiill)ressioii iii 70 r, the cyliiider. I