Патент USA US2137391код для вставки
Nov. 22, 1938. R. CHILTON 2,137,391 CYLINDER ATTACHMENT Filed Jan. 9, 1957 INVENTOR. Rozmvp CHILTON ‘ Patented Nov. 22, \1938 2,137,391 UNITED STATES PATENT’ OFFICE mesne assignments, to Wright Aeronautical Corporation, Paterson, N. J., a. corporation of _New York Application January 9, 1937, Serial Nt. 119,729 2 Claims. (Cl. 285-25) This invention relates to an improved attach circumference, the effect of the serrations being to give overlapping abutment faces against the ring and also to materially increase the effective ment or mechanical connection, the speci?c em bodiment of the drawing showing the device ap plied for attaching a cylinder ‘of an ‘aircraft en shear area of the ring. gine to the enginecrankcase. The underside of the ?ange 22 of the cylinder abutsa suitable shoulder in the crankcase. In ‘ , The usual form of attachment comprises a ?ange -on the cylinder cooperating with nuts this speci?c instance the abutment comprises a ring 28 abutting a seat 29 in the crankcase I4 as shown, the ring and the crankcase being pro vided with chamfers to accommodate a sealing screwed onto studs threaded into the crankcase. This form of attachment gets relatively bulky 10 and heavy in high powered engines. For ex ample, one well known fourteen-cylinder engine uses 224 studs and nuts for attaching the cyl inders and many of these are in relatively in ring 30, of soft material, to provide oil tightness. While the serrated ?ange embodiment shown in the drawing represents the preferred embodi .accessible positions between adjacent cylinders, ment of the invention, it may be carried out in a simpli?ed form, as shown in Fig. 3, by using 15 which considerably lengthens the time required for assembly and disassembly. Further, the a continuous ?ange 22' on the cylinder of a stressesin the cylinder barrel and crankcase are apt to be concentrated around each nut and stud. Accordingly, objects of the present invention 20 are to avoid the foregoing limitations and to pro vide a simpli?ed construction which shall be eco diameter equal to mean diameter of the split ring 26 and by similarly forming the inside of the nut 20' to a smooth bore that will just pass over » the cylinder ?ange. In this case, there are apt 20 to be compressive reactions upon the cylinder sleeve which are avoided by the overlapping rela tions of the serrated members of the preferred nomical in weight and cost and afford relatively uniform stress distribution. Other objects and advantages will be pointed out in, or will be obvi embodiment. 25 ous from, the following description, with refer ence to the drawing, injwhich: . old in the art, but it will be appreciated that the presence of the ?ns l2, or other enlargements on the cylinder prevents any conventionahring inder and crankcase of a radial engine, Fig. 2 is an “exploded” perspective view of th 30 essential parts of the invention, and ' bodiment of ‘the invention. . . nut from being assembled into the reduced diam eter between these ?ns and the cylinder ?ange 30 which the .nut is about to abut. In ‘one known ‘ construction, this dilemma was overcome by forming the nut initially integral with‘ the cyl inder above the cylinder holding ?ange and then parting the nut from the cylinder material proper, by the use of a slender tool, which still ' In the drawing, ‘l0 designates a cylinder hav 35 ing conventional cooling ?ns l2, the cylinder pro— jecting into a crankcase M which is split in the plane of Fig. l (at l5 in Fig. 2) and secured by . through bolts l6»in the usual way. ‘ Concentric with each cylinder axis, the crank ’ I am aware that ?ange and annular nuts are 25 Fig. l isa fragmentary section through 8, cyl Fig. 3 is a‘ fragmentary section'through a' cyl inder and crankcase showing an alternative em ’ left the necessary excess of ?ange diameter over ‘ the'bore of the nut, which thus could not be -40 case is provided with integral'annular projectionsv demounted from the cylinder without spoiling the utility of both. The present invention’ com I8 which are internally screw-threaded to receive prises an improved and simpli?ed means of de 40 companion screw-threads ,on _a ring nut 20. The tachably mounting a ring nut for assembly in cylinder is provided with a serrated ?ange 22 abutting relation with a cylinder ?ange in spite and the nut is provided with internal serrations ' of projections on the cylinder which prevent the 45 24 which are adapted. to be passed over the serra assembly of the nut over the upper end thereof. 45 tions 22 of the cylinder barrel. A split ring 28, While I have described. my invention in detail which may be of'circular cross-section, is sprung in .its present preferred embodiment, it will be ‘ over the serrated ?ange 22 of the cylinder after. the nut 20 has been passed overthe ?ange 22. '50 The upper side of the ?ange 22 is made to con form to the vpro?le of the ring as is the lower side of the serrations 24 of the nut 20. It will be seen that when the nut is screwed home (by the wrench teeth 32) , against this ring, the latter is stressed in shearqaroundnits whole. . obvious‘ to those skilled in the art, after under standing my invention, that various changes and modifications may be made therein without de 50 parting from the spirit or scope thereof. - I aim in the appended claims to cover all such modi ?cations and changes. I claim as my invention: 1. The combination with a cylinder and a case, 2 ' 2,187,391 ’ ofan annular nut, a ?ange on the cylinder over lapping the bore of said nut, serrations on said ?ange and in said bore to permit the nut to be passed into position for assembly, a split ring >5 adapted to retain said nut from re-passing said diameter, a cylinder having a ?ange of greater diameter, a nut having a ?ange of lesser diam eter, a body means into which said'nut is se cured for securing the cylinder thereto in as sembled relation, and serrations in said ?anges ?ange and threads in said case into which said - whereby one may pass the other when said split nut is screwed to hold said ?ange in assembled ring has been removed. relation against said case. ' 2-_ In combination, a split ring 0! given mean ROLAND CHILTON. '