Патент USA US2404862код для вставки
y _Juäy 0, 1946. . H. P. PHILLIPS PISTON RING ASSEMBLY ELEMENT AND METHOD OF MAKINGv l‘ Filed Feb. 2, 1945 , / .','/////////f"` áv 2,404,862 l' ZZ ó . 2 Sheets-Sheet l Juäy 30, i946. H. P.- PHILLIPS; n ` ' 2,404,362 PISTON RING ASSEMBLY ELEMENT AND METHOD OF MAKÍNG Filed Feb. 2, 1945 ' 2 sheets-sheet 2 @www Patented July 30,1946 2,404,852 Unirse si‘nrss rnrsnr Nosriìcs PISTON RING ASSEMBLY ELEMÉNT AND ` Y`METH0D 0F MAKING . Harold E’. Phillips, Hastings, Mich., ‘assìgnor to . Hastings .Manufacturing Company, Hasting Mich., a corporation of Michigan ‘ ` ` i Application February 2, 1945, Serial No. 575,754y .12 Claims. . 1 (Cl. 309-44) 2 , This invention krelates to improvements in >-pis ton ring assembly element `and method of making. Fig. ’7 _is afragmentary viewin section .on a line corresponding ‘to line l-l of Fig. 8. ` Fig. 8 is an edge or peripheral AView of the ring The main objects of this 'invention are: assembly of Figs.`6, 7 and 9. First, to provide a piston ring or piston ring assembly formed entirely of ductile metal which can be readily and economically fabricated and Fig. >9 is a transverse section on line 9_9 of Fig. 6. Fig. lois a perspective View of a strip or ribbon of steel or metal such as is used Vin the forming is not likely to be broken or distorted in use. Second, to provide Va piston `ring or piston ring assembly -having these advantages with the ad vantage of ~very free Vdrainage thereby well adapt of the piston ring element. Fig. 11 is a perspective view illustrating the second step or coiling step, the first step in the manufacture being namely that of folding the ing it for use as "an Aoil ring. Third, to provide a piston ring element formed entirely of ductile metal having side drain open ings, the stock or metal `being continuous from end to end ofthe v‘ring thereby providing uniform characteristics of strength‘and resilience ‘and eX ribbon stock longitudinally upon itself as a straight strip, not being illustrated but it will be understood from Figs. 1l and l2. Fig. 12 is an enlarged perspective view `of the multi-folded lcoil radially sectioned on line i12-*I2 pansibility throughout the length `of the ring. Fourth, Vto provide a piston ring Velement of Fig. 13. ' ‘A ` ` Fig. 13 is a side elevation Viewed from the top formed `of vductile metal which may be used as a spacer element in combination with íiat elements 20 of Fig. 12. formed of ribbon steel. Fig. 14 is a Vfragmentary >view partially in sec tion of Va punch or die apparatus used in the upsetting of spaced reaches of the element shown in Fig. 13 and illustrating a further step in the " Fifth, to providea method of manufacturing piston ring elements whereby lelements -of uni form characteristics maybe economically pro-k Y ~ 25 manufacture, the removable die member being Objects relating to details and ‘economies of shown in retracted position 'after the upsetting the invention will appear from the -description to follow. The invention is `defined `and pointed Fig. 15 is an enlarged fragmentary'view'in ‘sec out in the claims. tion on vline Iii-_l5 of Fig. 14. ` A "preferred embodiment >of the invention is 30. Fig. 16 is a side view of the ring `element as illustrated Ain the accompanying drawings, `in removed rfrom the forming die and prior to per which: ` mitting it to spring open to the normal expanded Fig. 1 is a fragmentary section of a piston ring position shown in Fig. ’2. embodying my invention, on line l l Vof Fig. 3, In considering the accompanying drawings, it installed in the `drainage ring groove of a piston 35 should be borne in ‘mind that no attempt has and‘in operative relation to a cylinder, the piston been made to .show the parts in ,their relative duced. step. ‘ ' . and cylinder parts being shown Iconventionally proportion or where associated with a piston and cylinder to show the clearances and` relative clearances. ' dimensions. 4Fig.2 is an inner side elevation of one of the 40 The stock illustrated at l is relatively thin piston ring' elements inyits expanded position. but it Ymay vary considerably in thickness, den Fig. 3 is an enlarged fragmentary edge or pe pending somewhat on the size of the ring and ripheral View ofthe ring assembly of Fig. l. the character of .the material used and any range Fig. `‘l is a fragmentary perspective View of a from .007 to .0039, for example, >but desirably piston ring element sectioned through an axially 45 from .01() ‘to .020. If the element `is designed or upset reach thereof. i v intended merely as a spacer element for .a pair and Without particular regard to dimensions or Fig. `5 is a perspective ¿View of one of the piston ring elements sectioned through a `spacer reach of cylinder "wall 'engaging side members, for eX ample as shown in Figs. 6 `to 9 inclusive, the thereof. i spacer element may be of relatively soft material. Fig. i6 »is an enlarged fragmentary section on «a 50 However, it may desirably Vbe made of wear line ‘corresponding to line 5_5 of Figs. 8 and 9, resisting materials even-when used as a spacer, illustrating a piston ring assembly comprising a one side ¿member of the element being used `as a pair of flat side members with one of the Apiston cylinder wall engaging or “contacting member. ring Jelements of `this invention .as A.an interme diate member. .In Ythe drawings, `2 i represents :a »cylinder and :55 ;3 apiston fhavìng 'a piston ring groove A therein 2,404,862 3 4 , . provided with drain passages 5. I will first de ported close to the edge thereof and is rein scribe> one of the piston ring elements and the method of making as the description of the method will aid in an understanding of the de scription of the ring element. forced so that it does not distort or vibrate in use. I have'illustrated and described very practical embodiments of my invention. I have not at tempted to illustrate or describe other embodi- ' The ring element designated generally by the ments or adaptations as it is believed that this disclosure Will enable those skilled in the art to embody or adapt my invention as may be desired. numeral 6 is formed of a strip or ribbon of ductile metal which is folded longitudinally upon itself to form it into a general W-shape as shown for Having thus described my invention, what I example in Fig. 12, thusvproviding side members claim as new and desire to secure by Letters 'l and 8 connected by a fold 9, the bights of the fold I0, IO and II being open. These longitu Patent, is:l dinal folds can be effected in suitable fo-lding rollers Which are not illustrated as they form no ~ engagingside elements formed of ductile wear ble intermediate element formed of ductile Wear resisting material folded longitudinally upon it self into a plurality of radially disposed outer and intermediate plies, the several plies being con ` _ After the strip I0 is folded longitudinally upon itself, it is coiled edgewise, the coils being shown in Fig. 11. tinuous from end to end‘of. the element, one of the plies being flat and of greater axial Width These coils I 2 are cut intoannular than the other plies and constituting a cylinder f sections I3, the ends of the section forming the ring spiral I4. In Fig. 13, the split of the an nular element is substantially closed. v/all engaging member, the other plies being axially lconformed to provide alternate drain , It will be noted that the side member 'I is ñat. The section I3 is laid upon an anvil member` I5 having an annular recess IS therein of such Width as to receive the side member ‘I and pref , resisting material, and an annular split expansi part of this invention.v The side member V'I is preferably substantially Wider than the side mem ber 8 and constitutes a cylinder Wall engaging A member as shown in Fig. 1. ' 1. A piston ring assembly comprising a pair of thin split nat annular expansible cylinder Wall reaches and spacer reaches. , v . 2. A piston ring assembly comprising a pairof thin split nat annular expansible cylinder-Wall engaging side elements formed of ductile Wear erably support the ring in its collapsed position resisting material, andan annular split expan as shown in Fig, 13. Spaced reaches I'l of the members 8 and 9 are then upset axially by means of the die member I9 having an annular section sible intermediate element formed of ductile wear resisting material folded longitudinally upon it self into a plurality of radially disposed outer and intermediate plies, the several plies being con of the radially arranged upsetting elements 2G which compress the members 8 and 3 into side by tinuous from end to end of the element, one of side contacting relation With the member 1. The 35v the plies being flat, the other plies being axially reaches 2I between the upset reaches I'I con conformed to provide alternate side drain reaches stitute spacing members. When the elements are removed from the die, they normally spring to the open position shown in Fig. 2 and Whenthey are inserted into a cylinder they are collapsed and they normally exert a substantial radial thrust or unit pressure as it is commonly designated against the cylinder Wall. These elements are preferably formed of Wear-resisting metal such as steelof proper carbon content although other Wear-resisting metals and materials may be used. Steel is found highly satisfactory particularly Where the element is designed as a cylinder Wall engaging element as is shown in the embodiment of my invention illustrated in Fig, 1. In that em bodiment, a pair of elements are arranged in op and spacer reaches. , 3. A piston ring element comprising a pair of annular split resilient piston ring elements, each 4G> formed of Wear-resisting ductile metal folded upon itself into‘a plurality of plies disposed in side by side relation, one of the plies being flat and of greater radial Width than the other plies and’constituting a cylinder Wall engaging ele ,->ment, the remaining plies being conformed to provide alternating spacer and side drain reaches, -the drain reaches substantially exceedlng in length the length of the spacer reaches, the ele ments being arranged with the spacer reaches of 59;; one element Within the drain reaches of the other. 4. A piston ring assembly comprising a pair'of posed relation as shown in Fig. 3, the spaced annular split resilient piston ring elements,> each members 2I being Within the compressed reaches formed of Wear-resisting ductile metal folded I'I Which provide side drain'recesses for the ele upon itself into a plurality of plies disposed in ments. In this arrangement, the reaches Il are ¿5D-¿side by side relation, one of the plies being fiat preferably substantially longer than the reaches and of greater radial Width than the other plies 2| so that suitable drainage is provided. ' and constituting a cylinder wall engaging ele In the embodiment of my invention shown in 'ment, the remaining plies being conformed to Fig. 6, one of the elements is arranged inter provide alternating spacer and side drain reaches, mediate the flat cylinder Wall engaging members au4 the elements being arranged with the spacer 22 and constitutes a supporting and spacer mem- » reaches of one element Within the drain reaches ber therefor and also provides suitable drain of the other. . openings or passages. In this embodiment, the 5. A split expansible inherently resilient piston expander 23 acts only on the side members 22. ring element formed of a ribbon of ductile Wear In the embodiment shown in Fig. 1, t‘ne expander cs resisting metal folded longitudinally upon itself 23 acts upon both of the elements. . to provide a ñat cylinder Wall engaging side mem.. _It Will be noted that no part of the ring ele ber, a'second side member of less radial Width ment is cut away. The result is that the element and an intermediate folded web portion of a Width has very uniform strength and tension from end substantially that of the second member but' toend. It is not subject to breakage or likely 70- 'folded to space the said side members, said side to be permanently distorted in manipulations to member and said intermediate web member be install the same. It may be made of quite thin ing axially upset against the side ofthe cylinder stock consequently presenting a thin or relatively wall engaging member at spaced reaches thereby sharp edge t0 the cylinder Wall and at the same providing side drain openings, the spaced `por-' Vtime >the cylindervvall engaging member is Sup 75 tions and the upset portions being continuous. -f f 2,404,862 5 6 6. A split expansible piston ring element formed plurality of plies disposed side by side and coiled of thin ductile Wear-resisting material and com prising an annular flat cylinder wall engaging side member, and a second side member of less radial Width, the inner edges of said side member edgewise after folding, one of the plies being flat throughout and constituting a cylinder wall en being integrally connected by a folded interme diate member, said second side member and said intermediate member having spaced reaches thereof axially spaced relative to each other and reaches intermediate such spaced reaches in 10 which the members are axially collapsed to pro vide side drainage recesses. gaging member, the other plies being upset axially at spaced intervals against the inner side of the cylinder wall engaging ply providing spaced side drain openings. 10. A split expansible piston ring element formed of a ribbon of ductile wear-resisting metal folded longitudinally upon itself and coiled edge wise to provide a flat cylinder wall engaging side member and a second side member connected in- _ tegrally thereto by an intermediate return fold, spaced reaches of said second side member and a plurality of plies, one of the plies being ñat and 15 of said intermediate return fold being upset ax ially providing alternating spacer reaches and constituting a cylindrical Wall engaging member, drain reaches. spaced reaches of the other plies being upset 11. A split expansible piston ring element axially into side by side contacting relation with formed of a strip of ductile metal..folded longi each other and with the cylinder Wall engaging member, the reaches intermediate said upset 20 tudinally upon itself into a plurality of plies dis posed side by side and coiled edgewise, the plies reaches being of an axial Width substantially ex being continuous from end to end of the element, ceeding the upset reaches and providing there one of the plies being flat and constituting a with alternate spacer reaches and drain reaches. cylinder Wall engaging member, the other plies 3. A split expansible piston ring element con having spaced reaches axially upset providing sisting of ‘a ribbon of ductile metal folded longi alternating side drain recesses and spacer reaches. tudinally upon itself and coiled edgewise provid 12. A split expansible piston ring element ing a cylinder wall engaging member constituted formed of a strip of ductile metal folded longi by one edge of the ribbon, and a multiple fold side tudinally upon itself into a plurality of plies dis portion at one side thereof, said multiple fold posed side by side and coiled edgewise, the plies side portion being axially upset at spaced inter being continuous from end to end of the element, , vals to provide side drain recesses, the plies of the one of the plies being'flat, theother plies having multi-fold side portion between said upset por '7. A_split annular resilient piston ring element formed of ribbon steel folded longitudinally into tions being axially spaced. 9. A split expansible resilient piston ring ele ment formed of a ribbon of ductile Wear-resisting 35 metal folded longitudinally upon itself into a spaced reaches axially upset providing alternat ing side drain recesses and spacer reaches. HAROLD P_ PHILLIPS.