Dec. i0, 1946. K. KLEIN 2,412,517 NAIL Filed Jan. 26, 1945 z". Fg. 10 . '25%' .9. Patented Dec. lil, 1946 '2,412,517 UNITED STATES PATENT OFFICE 2,412,517 NAIL Karl Klein, Westport, Conn. Application January 26, 1945, Serial No. 574,704 4 Claims. (Cl. 85,-10) l 2 This invention relates to a nail and particu larly to a nail which will have increased holding gradually or may be relatively sudden and ,pro vide a steep portion 5. The vanes 4 are tapered, power over or by comparison with an ordinary or conventional nail. It has for one object to provide a nail structure so shaped that a sub as at 6, and meetat a point "I, A ilat head 8 is formed integrally with the hollow portion I a-nd the vane portions 3. As shown, there are stantial part of the nail is put under heavy com pression, and therefore tends deñnitely to ad three vanes. For some purposes a lesser num ber-or a greater number of vanes might be used. here to the perforation or opening in which it is positioned. Another object is to provide a nail having a The nail of Figure 5 differs mainly from the nail of the earlier ñgures b-y the fact that an maximum surface area for contact with the ma portion. Thus the nail 5 consists of a hollow cylindrical or tubular portion 9 with an integral terial into which the nail is driven. Y Another object is to provide a partially `hollow nail with relatively thin` walls susceptible to slightl distortion upon being subjected to com pression. Other objects will appear from time to time throughout the specification and claims. , This invention is illustrated more or less dia enlarged solid portion is present below the hollow flat head l0. Below the hollow portion 9 is a rounded, somewhat reduced solid portion II. A relatively sharp taper I2 may join the exterior of the portion I with the portion II. The solid portion I I is tapered, as at I3, to form a point i4. Formed integrally with the hollow portion 9 and the head I0 is a plurality of vanes I5. These grammatically in the accompanying drawing, 20 vanes are of one diameter throughout substan tially the length oi the hollow portion and are wherein: Figure 1 is a side elevation of one form of the nail; Figure 2 is a plan View of the nail of Figure 1; tapered to form vanes of less diameter' I6 gen erally throughout the length of the~ solid `portion I I, A relatively steep taper l1 may join the por Figure 3 is a longitudinal section taken at line 25 tions I5 and I6 of each vane, or this taper may be more gradual. The reduced vane portions I6 3--3 of Figure 2; Figure 4 is a transverse section taken at line are further reduced or tapered, as at I8, and come together at the point I4. The entire struc 4-4 of Figure 3; ture is preferably integral. Figure 5 is a longitudinal section generally similar to Figure 3, and showing a modified form; 30 The form of Figures 8, 9 and 10 diiîe'r's from the preceding forms mainly in the fact that the Figure 6 is a transverse section taken at line hollow portion, instead of being tubular or Cylin 6_6 of Figure 5; Figure '7 is a transverse section taken at line drical, is irregularly shaped with a plurality of 'I-‘I of Figure 5; Figure 8 is a side elevation with parts broken away, showing a further modiñcation; concaves. Thus a hollow portion AI9 is bounded by three concave walls 20, although it might be bounded by a larger number of walls. Vane por tions 2I are formed integrally with the wall por Figure 9 is a transverse section‘taken at line 9_9 of_ Figure 8; and _ Figure 10 is a transverse section taken at line Ill--Ill of Figure 8. Like `parts are indicated by like characters throughout the specification and the drawing. As shown in Figures 1, 2, 3 and 4, the nail comprises a generally tubular or cylindrical shank tions 2'íl'. Below the hollow portion» formed by the concave walls 2D' the vanes are reduced, as 40 at 22. Each vane portion 2l may be joined to the corresponding portion 22 by sharply reduced or tapered `portion 23, or the taper may be more gentle. The reduced Jportions, 23 are further -re duced or tapered, as at 24, and meet to form a section I. This is provided with relatively »thin 45 point 25. Formed on the nail and integrally with its various parts is a head which comprises Walls and a pointed or tapered bottom portion an annularwall 25 and a iiat or shoulder portion 2. Integral with the cylindrical portion I is a plurality of longitudinally disposed vanes 3. 2l. Within the annular member 26' andabove the flat portion 2l is formed a depression 28’r major length of the hollow portion I. They are 50 which may receive finishing material when the nail is driven home. reduced, as at 4. This reduction occurs approxi Although I have shown an operative form of mately at the point where the hollow portion I my invention, it will be recognized that many is reduced. changes in the form, shape and arrangement of The reduction from the portion of each vane 3 to the portion 4 of the same vane may occur 65 parts can be made Without departing from the These vanes are of one diameter throughout the 2,412,51'? 3 spirit of the invention, and my showing is there fore to be taken as, in a sense, diagrammatic. The use and operation of this invention are asfollows: 4 9 or 20 which carries the vanes or prongs 3, I5 or 2| -having some resiliency and being under compression, offers resistance to the displacing which is exerted upon the nail by -the walls of This nail may -be used for almost any purpose 5 the holes or perforations within which .the nail lies. 'I‘hus by compressing the walls of the hollow for which a nail is required, but i-t is particularly advantageous for use where especially strong holding powers are required. In many situations in which a nail is required, it is undesirable or portion, a force is obtained which presses from .the center of the hollow portion outwardly toward the periphery and creates friction between the unsatisfactory to use a drive screw or a ring shank 10 nail and the walls of the hole within which it lies. This friction is suñicient to result in ade nail or other nails having a shank with more or less transverse members. With certain types of wood and wood in certain conditions, some nails having roughened shanks or drive screw nails tend to break or shred the fibers of the Wood and when >that occurs, as the lumber in which the nail is driven dries out, the hold of the nail upon the lumber is weakened by the drying of the shredded or broken fibers. It is one of the purposes of this invention to provide a nail having substantial holding powers and arranged to break or disturb the fibers of the wood as little as possibleThe nail also has important uses as a nail in which it is used to fasten plaster board, laminated boards and other structural members in place and in which the nail itself is driven flush with the outer surface or actually beneath the outer surface and a finishing material such as plaster is applied to the entire wall structure. quate holding power and to prevent displacement of the nail. The head of the nail is, in the form shown, only slightly larger lthan the over-all diameter of .the nail, including the vanes. It might be of greater or less relative diameter. When the nail is driven the head may be countersunk, if de sired, and ñnishing material such as plaster or something comparable to it may be spread over the wall end of the nail head and will penetrate into .the nail and key with it as above described. I claim: 1. In combination in a nail, a hollow shank portion, closed at one end, a plurality of generally radially projecting vanes positioned on the ex terior of said hollow portion and spaced about its surface, said vanes being of reduced radial extent below said hollow portion, and joined at their In a case of that sort a nail of the form of 30 inner edges and terminating in a point, there being a head ñxed upon the nail, the hollow por Figure 8 has particular advantages, but the other tion, the vanes and the head being integral with forms are also adaptable. A part, at least, of respect to each other. .the hollow may receive finishing material which 2. In combination in a nail, a hollow unbroken keys with it and which not only covers the nail, cylindrical shank portion having one end open, a but serves Ito hold lthe finishing material in place plurality of generally radially projecting vanes because of its engagement with the nail. positioned on the exterior of said hollow portion When the nail is to be used in any of its forms, and symmetrically spaced about its surface, said it is driven into .the material which is Ato be held vanes being of reduced radial extent below said in place. In each form of the device the lower portion is of less diameter than an upper portion. 40 hollow portion, and joined at .their inner edges and terminating in a point, a nail head at the The lower portion serves as a penetrating and open end of the shank. the hollow portion, the hole or perforation forming member. It is into vanes and the head being integral with respect to this hole or perforation which has initially been each other. formed by the lower portion of the nail that the 3. In combination in a nail having a plurality upper portion or larger portion of the nail is 45 of outwardly directed vanes of varying radial driven. As the larger portion of the nail moves extent, the lower ends of said vanes being joined into the opening formed by the smaller or nar at their inner edges, and terminating in a point, rower portion of the nail, it is put under com pression andthe thin walled hollow portion is put and means for exerting an outward pressure upon under definite and substantial compression. As a the material into which said nail is driven, said means comprising a relatively thin walled hollow result of this, the outer surface of the hollow portion of the nail grips the wall of the perfora tion into which it has been driven more eiîec tively than would be the case if the entire nail were of uniform diameter. The narrower or smaller part of the nail is solid and that is the portion which effects pene tration of the Wood or wall board or other ma member carrying said vanes, all of the parts of said nail being integrally formed each with re spect to the others. 4. In combination in a nail a plurality of sym metrically> spaced, outwardly directed vanes of varying radial extent, said vanes being of lesser radius toward the lower portion of the nail, and terminating in a point, and means for exerting .terial into which the nail is driven. Because this relatively thin walled tubular section has resili 60 an outward pressure upon a body into which the nail is driven, said means comprising a relatively ency, it is capable of exerting pressure in a radial thin walled hollow member carrying said vanes, direction against .the wood or wall board or other and positioned generally above and away from material into which it is driven. the point of said nail, all of the parts of said nail This is in sharp contrast to the performance of a solid nail which, when driven into such ma terial, lacks resiliency and can exert no pressure, radial or otherwise, upon the material which en gages it. Tha-t portion of the hollow member I, being integrally formed each with respect to the others. KARL KLEIN.