US3065661A - Blind rivet having a bore defined by a plurality of flat walls - Google Patents

Blind rivet having a bore defined by a plurality of flat walls Download PDF

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Publication number
US3065661A
US3065661A US846102A US84610259A US3065661A US 3065661 A US3065661 A US 3065661A US 846102 A US846102 A US 846102A US 84610259 A US84610259 A US 84610259A US 3065661 A US3065661 A US 3065661A
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United States
Prior art keywords
rivet
head
pin
sleeve
tubular rivet
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Expired - Lifetime
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US846102A
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English (en)
Inventor
Robert F Kolec
Vernon L Dunham
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Olympic Screw and Rivet Corp
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Olympic Screw and Rivet Corp
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Filing date
Publication date
Priority to NL248062D priority Critical patent/NL248062A/xx
Application filed by Olympic Screw and Rivet Corp filed Critical Olympic Screw and Rivet Corp
Priority to US846102A priority patent/US3065661A/en
Priority to GB43658/59A priority patent/GB887799A/en
Priority to FR814063A priority patent/FR1243687A/fr
Priority to CH360251D priority patent/CH360251A/fr
Priority to NL248062A priority patent/NL106954C/xx
Application granted granted Critical
Publication of US3065661A publication Critical patent/US3065661A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/04—Rivets; Spigots or the like fastened by riveting
    • F16B19/08—Hollow rivets; Multi-part rivets
    • F16B19/10—Hollow rivets; Multi-part rivets fastened by expanding mechanically
    • F16B19/1027—Multi-part rivets
    • F16B19/1036—Blind rivets
    • F16B19/1045—Blind rivets fastened by a pull - mandrel or the like
    • F16B19/1054—Blind rivets fastened by a pull - mandrel or the like the pull-mandrel or the like being frangible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/58—Making machine elements rivets
    • B21K1/60—Making machine elements rivets hollow or semi-hollow rivets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/008—Bolts without screw-thread; Pins, including deformable elements; Rivets with sealing means

Definitions

  • the present invention relates in general to a blind rivet assembly and to a method of manufacturing a component of such an assembly, a primary object of the invention being to provide a blind rivet assembly capable of producing high' clinching forces when set.
  • a blind rivet assembly of the type to which the invention relates comprises a pin having thereon a tubular rivet which includes a sleeve having a head at one end and a tail at its other end, the pin being provided at one end thereof with rivet expanding means adjacent and engageable with the tail of the tubular rivet and being provided with grippable means at the other ends thereof.
  • the pin is provided with an enlarged shank terminating in a further enlarged head to form the rivet expanding means and is provided with a weakened zone or break neck intermediate such shank and the grippable means.
  • the assembly is inserted through registering holes in elements to be riveted together so that the tail of the tubular rivet and the head on the pin are on the blind or inaccessible side of such elements and the head of the tubular rivet and the grippable means on the pin are on the opposite side thereof.
  • a riveting tool having pressure and pulling members is applied to the rivet assembly with the pressure member seated against the head of the tubular rivet and with the pulling member in engagement with the grippable means on the pin.
  • the pulling member is then moved axially of the pressure member to draw the head on the pin into tail expanding or flaring engagement with the Itail of the tubular rivet, thereby clamping the elements which are to be riveted together between the head of the tubular rivet and the expanded or flared tail thereof.
  • the pin of the rivet assembly snaps at the break neck therein, upon completion ofthe setting of the rivet assembly, and any excess portion of the pin may be trimmed olf flush with the head of the tubular rivet.
  • An important object of the present invention is to provide a rivet assembly of the foregoing nature wherein the tubular rivet is internally weakened along circumferentially spaced, longitudinal lines from the tail of the rivet toward the head thereof so that, as the head on the pin is drawn into the sleeve, it splits the sleeve longitudinally along the internal longitudinal lines of weakness into a plurality of prongs which engage the blind side of the assembly of elements to be riveted together. As the head on the pin splits the sleeve into prongs, it also spreads the prongs in such a manner that the prongs clamp the elements to be riveted together firmly against the head of the tubular rivet with a wedging action, which is an important feature.
  • Another object is to longitudinally weaken the sleeve of the tubular rivet internally from the tail toward the head by providing the rivet with an internal cross section in this region which is noncircular and which has apices forming the internal longitudinal lines of wea-kness mentioned. More particularly, an object in this connection is to provide the tubular rivet with an axial hole extending from the tail toward the head Which is polygonal in cross section, the apices of the resulting polygon forming the internal longitudinal lines of weakness along which lthe sleeve splits. While the polygonal hole in the tail end of the tubular rivet may have as few as three sides, or more than four sides, such hole is preferably a four-sided, substantially square one.
  • Another important object of the invention is to provide a method of forming a tubular rivet of the foregoing nature from a solid cylindrical bar of material which comprises punching the aforementioned polygonal hole in one end of the bar to a depth approaching the distance between the tail and the head of the finished tubular rivet, the opposite end of the bar being upset to form the head and the polygonal hole being extended the rest of the way through the bar, as a circular hole, to render the nished rivet tubular.
  • the circular internal portion of the ltubular rivet is also formed by punching.
  • the material of the sleeve at the internal surface thereof is placed in a state of axial compression relative to the material of the sleeve at the external surface thereof. Consequently, when the sleeve is split into prongs by the head on the pin in setting the rivet assembly, the stress differential between the internal and external surfaces of the prongs causes them to curl outwardly through substantially so that the ends of the prongs seat against the blind side of the assembly of elements being riveted together.
  • Another object of the invention is to provide thehead on the pin with a divergent annular surface of concave cross section which engages the internal surface of the sleeve to force the prongs outwardly upon splitting of the sleeve and which is so shaped as to assist the aforementioned axial stress diferential in curling the prongs outwardly and axially toward the head of the tubular rivet, and which is also so shaped as to spread the prongs to wedge the elements to be riveted together -iir-mly against the head ofthe tubular rivet.
  • An object in connection with one embodiment of the invention is to provide the tail of the tubular rivet with radial grooves or notches which extend from the internal surface of the sleeve to the external surface thereof and at least some of which are respectively adjacent the apices of the square or other polygonal hole in the tail end of the tubular rivet.
  • the number of such radial grooves considerably exceeds the numbers of apices of the polygonal hole so that some of the grooves will always be adjacent the respective apices of the polygonal hole to facilitate initiation of splitting of the sleeve into prongs.
  • An object in connection with another embodiment of the invention is to bevel or chamfer the ⁇ tail of the tubular rivet externally to provide it with a thin annular edge adjacent the periphery of the square or other polygonal hole in the tail and of the tubular rivet.
  • This thin annular 0 edge is weakened by the apices of the polygonal hole so that splitting of the tail end of the tubular rivet into prongs lhead on the pin into the tail end of the rivet slightly during assembly to start the desired splitting, i.e., to presplit the tail end of the rivet.
  • an important object of the invention is to pre-split the tail end of the rivet slightly at the ends of the internal longitudinal apices therein to facilitate spliting of the rivet by the head on the pin during setting of the rivet assembly, such pre-splitting of the tail end of 4the rivet being accomplished either by the head on the pin during assembly of the rivet and the pin, or being accomplished prior to assembly of the rivet and the pin by suitable tools designed for the purpose.
  • the internal surface of the hole through the tubular rivet is polygonal only from the tail of the rivet substantially to the head thereof, the internal surface of the rivet being circular within and adjacent ⁇ the head.
  • Another object in this connection is to provide the shank of the pin with retaining means, such as annular or longitudinal ribs, engageable with the walls of the polygonal hole prior to setting of the rivet assembly to hold the pin and the tubular rivet in assembled relation, and engageable with the wall of the circular hole in the head end of the rivet to assist in locking the pin in place in the tubular rivet after the rivet assembly is set, wherefore no swaging of the head onto the pin is needed.
  • retaining means such as annular or longitudinal ribs
  • FIG. l is a view, partially in elevation and partially in longitudinal section, illustrating a solid cylindrical blank, from which the tubular rivet of the invention is to be formed, cut from a length of bar stock;
  • FIG. 2 is a longitudinal sectional view illustrating the li'rst step in forming the tubular rivet from the blank;
  • FIG. 3 is a longitudinal sectional view illustrating the second step in forming the tubular rivet, FIG. 3 being Vtaken along the arrowed line 3-3 of FIG. 4;
  • FIG. 4 is a transverse sectional view taken along the arrowed line 4-4 of FIG. 3;
  • FIG. 5 is an elevational view of a punch for punching an axial polygonal hole in one end of the blank to produce the structure of FIG. 3;
  • FIG. 6 is a longitudinal sectional view illustrating the third step in the formation of the tubular rivet from the blank
  • FIG. 7 is a longitudinal sectional view illustrating the fourth and final step in forming the tubular rivet
  • FIG. 8 is an end elevational view taken as indicated by the arrowed line 8--8 of FIG. 7;
  • FIG. 9 is a longitudinal sectional view illustrating the first step in the setting of a blind rivet assembly of the invention, which blind rivet assembly includes the tubular rivet above referred to;
  • FIG. 10 is a transverse sectional view taken along the arrowed line 10-10 of FIG. 9;
  • FIG. 11 is a longitudinal sectional view illustrating the blind rivet assembly in partially set condition
  • FIG. l2 is a longitudinalsectional view illustrating the blind rivet assembly in fully set condition
  • FIG. 13 is a longitudinal sectional view illustrating the set blind rivet assembly after trimming olf excess material from a pin of the assembly;
  • FIG. 14 is an end elevational view of the set blind rivet assembly, FIG. 14 being of the bottom end of the rivet assembly as it is viewed in FIG. 13;
  • FIG. 15 is an elevational view of an alternative pin for the blind rivet assembly of the invention.
  • FIG. 16 is a longitudinal sectional view similar to FIG. 7, but showing another tubular rivet embodiment of the invention.
  • FIG. 17 is a longitudinal sectional view similar to FIG. 7, but showing still another tubular rivet embodiment of the invention.
  • FIG. 18 is a longitudinal sectional view similar to FIG. 9, but showing a rivet assembly incorporating the tubular rivet of FIG. 17;
  • FIG. 19 is a longitudinal sectional view taken along the arrowed line 19-19 of FIG. 18;
  • FIG. 20 is a longitudinal sectional View similar to FIG. 17 and showing another tubular rivet embodiment of the invention.
  • FIG. 2l is a longitudinal sectional view showing presplitting of the tail of the tubular rivet of FIG. 20;
  • FIG. 22 is an enlarged, end view of the tail of the tubular rivet of FIGS. 20 and 2l after pre-splitting thereof;
  • FIG. 23 is a fragmentary longitudinal sectional view taken along the arrowed line 23-23 of FIG. 22;
  • FIG. 24 is a longitudinal sectional view similar to FIG. 20;
  • FIG. 25 is a longitudinal sectional view similar to FIG. 21, but showing another means for pre-splitting the tail of the tubular rivet shown in FIG. 24;
  • FIG. 26 is an enlarged end view of a tool used in the pre-splitting operation shown in FIG. 25;
  • FIG. 27 is an enlarged, fragmentary internal elevational view of the pre-split tubular rivet of FIG. 25 showing a split therein;
  • FIG. 2S is a longitudinal sectional view similar to FIG. 20, but showing still another tubular rivet embodiment of the invention.
  • FIG. 29 is a longitudinal sectional view similar to FIG. 25, but showing pre-splitting of the tail of the tubular rivet of FIG. 28;
  • FIG. 30 is a longitudinal sectional view showing yet another tubular rivet embodiment of the invention.
  • FIG. 31 is a transverse sectional View taken along the arrowed line 31--31 of FIG. 30.
  • the completed blind rivet assembly of the invention is designated generally by the numeral 2@ and includes a pin 22 having thereon a tubular rivet 24.
  • the latter includes a sleeve 26 having a tail 28 and a head 30 at opposite ends thereof, the head being shown as including a central boss 31 and an annular flange 32.
  • the head 30 may have the vconfiguration of the head 30a of the tubular rivet 24a of FIG. 16, the rivet 24a being otherwise identical to the rivet 24, or the head 30 may have some other configuration.
  • lsealing washer 33 is shown as carried by the sleeve 26 in engagement with the head 30, or, more particularly, in engagement with an annular shoulder 34 formed by the head and facing in the direction of the tail 28, for installations in which a fluid-tight seal is required.
  • the sleeve 26 is provided with an axial polygonal hole 36, preferably a substantially square hole, which extends from the tail 28 substantially to, but preferably terminates short of, the head 30.
  • the apices or corners 38 of the square hole 36 provide the interior of the sleeve 26 with circumferentially spaced, longitudinal lines of weakness extending from the tail 28 toward, but preferably termimating short of, the head 30.
  • the corners 38 of the square hole 36 provide longitudinal lines of weakness along which the sleeve 26 is adapted to split from the tail 28 toward the head 30.
  • the square hole 36 terminates at its inner end in a hole 40 of circular cross section which extends the rest of the way through the tubular rivet 24 and is located within the head 30.
  • Making the hole 40 circular in cross section provides maximum strength with reference to hoop stresses in this region, the tubular rivet 24 being subjected to such E stresses in setting of the blind rivet assembly 20 as discussed hereinafter.
  • the pin 22 is provided at one end thereof with means for expanding the tubular rivet 24 into engagement with the assembly of elements to be riveted together and for expanding the tail 28 of the tubular rivet into clinching engagement with the blind side of such assembly of elements.
  • This expanding means includes an enlarged shank 42 which terminates in a further enlarged head 44, the latter having divergent annular surfaces 45 and 46 for tail flaring engagement with the tail 2S of the sleeve 26.
  • the annular surface 45 is relatively acute and the annular surface 46 is relatively obtuse so that these surfaces, together, approach an arcuate, concave surface in cross section.
  • the shank 42 tapers into the body of the pin 22, as indicated at 47, and the shank is annularly ribbed, as indicated at 48, to provide a gripping means engageable with the wall of the circular hole 40v in the tubular rivet 24 when the blind rivet assembly Ztl is set, thereby preventing dislodgement of the pin.
  • the annularly ribbed portion 48 of the shank 42 also engages the sides of the square hole 36 prior to setting, as most accurately shown in PEG. l0, to hold the pin 22 and the rivet 24 together during shipment, handling, and the like.
  • FIG. l shows a pin 22a having a longitudinally ribbed portion 48a which achieves similar results.
  • a weakened zone or break neck 49 Adjacent the shank 42 of the pin 22 is a weakened zone or break neck 49, preferably in the form of an annular groove, the pin 22 being adapted to snap at this point when the blind rivet assembly 2d is set.
  • the pin 22 is provided, at the end thereof opposite the head 44, with grippable means 50, the means Sti being engageable by a gripping means on the pulling member of a riveting tool to be described.
  • the grippable means 5t comprises a plurality of annular ribs on the pin 22 formed by annularly grooving the pin.
  • the starting material is preferably cylindrical bar stock 5l, which may be of any suitable material, such as aluminum, or an aluminum alloy. From the bar stock 5l is cut a blank 52 of appropriate length, the length of the blank depending on the length desired for the tubular rivet 24 and the length of the latter being determined by the thickness of the assembly of elements with which it is to be used.
  • the blank 52 is placed in suitable dies, not shown, which punch an axial hole S4 in one end of the blank, this hole being of circular cross section.
  • a central axial indentation 56 is simultaneously punched in the opposite end of the blank S2 by such dies.
  • the blank 52 is next placed in dies, not completely shown, which include -a punch 58 for punching the square, or other polygonal, hole 36 in the blank, the square hole 36 being punched in the same end of the blank as the indentation 56.
  • the depth of the square hole 36 is such as to extend this hole from the tail 2S of the finished tubular rivet 24 substantially to, but preferably terminating short of, the head 30.
  • the square hole 36 extends about half the length of the blank -52 in the FIG. 3 condition of the blank.
  • the tip of the punch is provided with a slightly en larged head 59 and the sides of the punch are beveled slightly adjacent the corners of the punch, the beveled surfaces being designated by the numeral 60.
  • the bevel angle may, for example, be of the order of 7.
  • the blank 52 is next placed in dies, not shown, which partially head the end of the blank opposite the square hole 36 therein.
  • dies include a punch, not shown, which tits into the previously punched hole 54 in the head end of the blank 52, and include a punch, not shown, of circular cross section which ts into the square hole 36 and forms at the inner end thereof a hole 62 of circular cross section, the hole 62 constituting an extension of the square hole and preferably being of substantially the same diameter as the hole 54.
  • the blank 52 is placed in dies which provide the 4finished head 30 and which punch out the material separating the holes S4 and 62 so as to provide through the head 30 of the rivet the hole 40 of circular cross section.
  • the hole 40 may be at least partially a drilled hole.
  • the tail 28 of the resulting tubular rivet 24 is radially grooved or scored in a plurality of locations, the resulting radial grooves being designated by the numeral 66 and there being a sucient number of such grooves that each corner of the square hole 36 will have such a groove closely thereadjacent.
  • the square hole 36 and preferably both the square hole and the circular hole 40, are formed entirely from axial punching operations.
  • the effect of this is to compact the lmaterial of the tubular rivet 24 adjacent its inner surface relative to the material of the rivet adjacent its outer surface.
  • the material of the tubular rivet 24 at the internal surfaces of the square and circular holes 36 and 4t), and particularly the surfaces of the square hole 36, is in ⁇ a state of axial compression relative to the material of the tubular rivet at the external surfaces thereof. The effect of this will be discussed hereinafter.
  • the pin 22 and the tubular rivet 24 formed by the foregoing operations are assembled in the manner shown in FIG. 9 of the drawings and described previously.
  • the resulting blind rivet assembly 20 is inserted into registering holes 72 and 74 through elements 76 and 78 which are to be riveted together to form a riveted assembly 3%, FIGS. l2 and 13.
  • the rivet assembly 20' is thus inserted into the holes 72 and 74, the tail 28 of the tubular rivet 24 and the head 44 of the pin 22 are disposed on the blind side of the assembly 80, while the head 30 of the tubular rivet 24 and the grippable means 50 on the pin 22 are disposed on the accessible side of the assembly.
  • the washer 33 if used, under the head 30 is engageable with the accessible side of the assembly $0.
  • a suitable riveting tool 82 is lapplied to the rivet assembly. More particularly, the riveting tool 82 is provided with a pressure member or anvil 84 adapted to seat on the head 30 and is provided with a pulling member 86 which is movable axially of the pressure member and which is provided with gripping means 88 engageable with the grippable means S0 on the pin 22 of the rivet assembly.
  • the pulling member 86 is moved axially of the pressure member 84 in a direction away from the work assembly y8) to pull the pin 22 into the sleeve 26 of the tubular rivet 24.
  • the enlarged shank 42 expands the head end of the sleeve 26 and the head 44 on the pin 22 splits the sleeve 26 into prongs 90 along the corners 38 of the square hole 36, the splitting starting at the respective radial grooves 66 which are nearest the corners.
  • the head 44 on the pin 22 also spreads or flares the prongs 90 to cause them to act on the blind side of the element 78 with a wedging action to clamp the elements 76 and 78 between the prongs and the head 30.
  • the sleeve is expanded to substantially fill the holes 72 and 74.
  • the prongs 90 curl outwardly and axially toward the work assembly 80 and into additional clamping or clinching engagement with the blind side thereof, as shown in FIGS. 12 and 13.
  • Such curling of the prongs 90 is augmented by the effectively concave cross section of the pin 22 at the junction between the shank 42 and the head 44, but is due primarily to the axial stress differential between the internal and external surfaces of the square hole 36.
  • the axial compaction of the blank 52 in forming the tubular rivet 24 results in placing the internal surfaces of the square hole 36 in particular in a state of axial compression relative to the external surface of the sleeve 26 in the vicinity of the square hole.
  • annularly ribbed portion 48 of the shank 142 of the pin 22 is disposed in the circular hole 62 through the head end of the tubular rivet 24. This has the effect of retaining the pin in the position shown in FIGS. 12 and 13.
  • the pin 22 when the pin 22 arrives at its final position, the resistance to further axial movement thereof reaches a value such that the pin snaps at the break neck 49. As a final operation, the pin 22 may be trimmed off flush with the head 30 of the tubular rivet '24, as shown in FIG. 13 of the drawings.
  • a rivet assembly 120 which is similar to the assembly 20, the components of the assembly 120 being identified by numerals higher by 100 than those used to identify the corresponding components of the assembly 20. Only those components of the assembly 120 differing from the corresponding components of the assembly will be described specifically.
  • the assembly 120 differs from the assembly 20 only in that the tail 128 of the tubular rivet 124 is externally bevelled or chamfered, as indicated at 152, instead of being provided with the radial grooves 66 of the tail 28. Externally bevelling the tail 128 provides it with a thin annular edge 154 adjacent the periphery of the square or other polygonal hole 136. Further, a slight burr 156 is formed which extends into the hole 136. When the rivet 124 and the pin 122 are assembled, as shown in FIGS. 18 and 19, the burr 156 is displaced outwardly, as best shown in FIG.
  • the thin edge 154 is normally pre-split at the apices of the hole 1'36 upon assembly ⁇ of the pin 122 and the rivet 124.
  • a tubular rivet 160 comprising a sleeve 162 having a tail 164 and a head 166 at opposite ends thereof.
  • the internal surface of the sleeve 162 is provided with circumferentially spaced longitudinal lines of weakness 168 extending from the tail 164 substantially to, but preferably terminating short of, the head 166.
  • the lines of weakness 168 may be the apices or corners 168 of a polygonal hole 170 in the sleeve 162, such polygonal hole being extended through the head 166 as a round hole 172.
  • the tail 164 is externally beveled or chamfered, as shown at 174, and, prior to assembling the tubular rivet 160 with a pin, such as the pin 122, for setting it, the tail 164 is pre-split at the ends of the longitudinal corners 168, the splits being designated by the numeral 176 and being similar to the splits 158 of the tubular rivet 124 of FIGS. 17 to 19.
  • the splits 176 are formed by a suitable tool during manufacture, such as the tool 178 of FIG. 21.
  • the tool 178 which may have various configurations other than the one shown, is provided with a convergent annular surface 180 which engages the internal surface of the sleeve 162 at the tail 164 to form the splits 176 in much the same manner that the pin 122 forms the splits 158 in the tubular rivet 124 of FIGS. 17 to 19.
  • a tubular rivet which is substantially identical to the tubular rivet 160 so that the same reference numerals will be utilized to designate the various components thereof.
  • the tail 164 of the tubular rivet 190 is pre-split at the ends of the longitudinal corners 168, the splits being designated by the numeral 192.
  • the splits 192 are formed by a cutting tool 194 having a cruciform cutting edge 196 adapted to be aligned with the tail ends of the corners 168 and to be forced into the tail 164 to form the splits 192.
  • the tool 194 is shown diagrammatically as having a flat cruciform cutting edge 196, it being understood that such cruciform cutting edge may be formed on a convergent tool so that the cruciform cutting edge tapers toward its center. In this instance, the tool will pre-split the tail 164 of the rivet 190 more deeply at the internal surface of the rivet than at the external surface thereof.
  • FIGS. 28 and 29 show a tubular rivet 200 which is similar to the tubular rivet 160 so that identical numerals are utilized to designate corresponding components, the only difference between the rivet 200 and the rivet 160 being that the tail 164 of the rivet 200 is in a plane perpendicular to the axis of the rivet, instead of being externally beveled or chamfered.
  • a tool 202 similar to the tool 194 is utilized to pre-split the tail 164 of the rivet 260 at the tail ends of the corners 168 thereof, such splits being designated by the numeral 204.
  • a tubular rivet 210 of the invention which includes a sleeve 212 having a tail 214 and a head 216 at opposite ends thereof.
  • the rivet 210 is provided with an axial hole 218 of circular cross section extending entirely therethrough.
  • the wall of the hole 218 is provided with circumferentially spaced, longitudinal apices 220 which extend from the 9 tail 214 toward the head 216, but which preferably terminate short of the head.
  • the apices 220 are substantially V-shaped and are formed directly in a cylindrical internal surface of the sleeve 212, instead of be ing formed by the apices or corners of a polygonal hole in the sleeve.
  • the tail 214 of the rivet 210 is shown as provided with a rounded external bevel or chamfer 222 and is shown as provided with splits 224 at the tail ends of the apices 220.
  • a tubular rivet capable of permanent deformation and including (a) an externally cylindrical sleeve provided with a through bore and having at one end thereof a head with a transverse annular shoulder which faces the other end of said sleeve,
  • said pin head being of circular cross section substantially equal in diameter to said sleeve and the portion adjoining said pin being generally frusto-conical converging toward and into said sleeve bore whereby said frustoconi cal portion engages said flat walls along medial lines of Contact during said axial movement of said pin.
  • a tubular rivet capable of permanent deformation and including (a) an externally cylindrical sleeve provided with a through bore and having at one end thereof a head with a transverse annular shoulder which faces the other end of said sleeve,
  • said pin head being of circular cross section substantially equal in diameter to said sleeve and the portion adjoining said pin being generally frusto-conical converging toward and into said sleeve bore whereby said frusto-conical portion engages said flat walls along medial lines of contact during said axial movement of said pin.
  • a tubular rivet capable of permanent deformation and including (a) an externally cylindrical sleeve provided with a through bore and having at one end thereof a head with a transverse annular shoulder which faces the other end of said sleeve,
  • said pin head being of circular cross section substantially equal in diameter to said sleeve and the portion adjoining said pin being gen- 1 2 erally frusto-conical converging toward and into said sleeve bore whereby said frusto-conical portion engages said flat Walls along medial lines of contact during said axial movement of said pin,
  • said frusto-conical portion including adjacent said shank a -rst frusto-conical annular surface having an acute included angle
  • said frustoconical portion including adjacent said iirst frusto-conical annular surface a second frusto-conical annular surface having an obtuse included angle.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)
  • Forging (AREA)
US846102A 1959-07-17 1959-10-13 Blind rivet having a bore defined by a plurality of flat walls Expired - Lifetime US3065661A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL248062D NL248062A (fr) 1959-07-17
US846102A US3065661A (en) 1959-07-17 1959-10-13 Blind rivet having a bore defined by a plurality of flat walls
GB43658/59A GB887799A (en) 1959-07-17 1959-12-23 Blind rivet
FR814063A FR1243687A (fr) 1959-07-17 1959-12-24 Rivet borgne
CH360251D CH360251A (fr) 1959-07-17 1959-12-30 Rivet tubulaire et procédé de fabrication de ce rivet
NL248062A NL106954C (fr) 1959-07-17 1960-02-04

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US82787659A 1959-07-17 1959-07-17
US846102A US3065661A (en) 1959-07-17 1959-10-13 Blind rivet having a bore defined by a plurality of flat walls

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US3065661A true US3065661A (en) 1962-11-27

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US846102A Expired - Lifetime US3065661A (en) 1959-07-17 1959-10-13 Blind rivet having a bore defined by a plurality of flat walls

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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3169256A (en) * 1963-03-11 1965-02-16 Olympic Screw & Rivet Corp Method of forming sleeve for lock rivet
US3192821A (en) * 1962-11-19 1965-07-06 Olympic Screw & Rivet Corp Blind rivet having a grooved and deformable locking boss
US3217583A (en) * 1964-05-21 1965-11-16 Fulop Charles Unitary expansion anchor for bolts
US3232161A (en) * 1961-08-22 1966-02-01 Ft Products Ltd Blind fasteners
US3276308A (en) * 1965-04-26 1966-10-04 Emric W Bergere Blind fasteners
US3292482A (en) * 1963-08-30 1966-12-20 Avdel Ltd Self-plugging blind fastening device
US3515419A (en) * 1968-07-01 1970-06-02 Huck Mfg Co Container fastener
US3702088A (en) * 1971-03-31 1972-11-07 Boeing Co Double shank blind bolt
US3702087A (en) * 1971-03-31 1972-11-07 Boeing Co Double shank bolt
WO1985005414A1 (fr) * 1984-05-16 1985-12-05 The Bifurcated And Tubular Rivet Company Limited Rivets
US4958470A (en) * 1989-01-24 1990-09-25 Silver Metal Products, Inc. Elevated post anchor
DE10002223C1 (de) * 2000-01-20 2001-06-28 Eads Airbus Gmbh Heftblindniet aus Leichtmetall für den Flugzeugbau
WO2002019931A1 (fr) * 2000-09-07 2002-03-14 Synthes Ag Chur Dispositif de fixation d'implants chirurgicaux
US20050145004A1 (en) * 2002-11-12 2005-07-07 Alessandro Vescovini Methods for the cold extrusion of metallic elements with dead or through holes and plant for carrying out said methods
WO2008064875A1 (fr) * 2006-11-30 2008-06-05 Sumanjit Singh Rivet
US20080164109A1 (en) * 2006-12-06 2008-07-10 Audi Ag Composite brake disc
EP1923580A3 (fr) * 2006-11-20 2010-04-21 Pias Sales Co., Ltd. Rivet aveugle de type pétale
US11519471B2 (en) * 2017-08-02 2022-12-06 Robert Bosch Gmbh Brake disc and method for producing a brake disc
US11833576B2 (en) * 2018-08-03 2023-12-05 Atlas Copco Ias Uk Limited Riveting method

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US4015505A (en) * 1976-02-23 1977-04-05 Illinois Tool Works Inc. One sided fastener device
GB2136075B (en) * 1983-03-07 1986-11-05 Avdel Ltd Rivet
CA1253017A (fr) * 1983-09-29 1989-04-25 Usm Corporation Rivet a tete secondaire de fortes dimensions
DE3400475A1 (de) * 1984-01-09 1985-07-18 Hilti Ag, Schaan Verfahren zum herstellen eines metallischen spreizduebels
DE3742884A1 (de) * 1987-12-17 1989-07-06 Boellhoff & Co Buchse
DE68902323T2 (de) * 1988-02-12 1993-01-28 Avdel Systems Ltd Blindniet.
DE4003373C1 (fr) * 1990-02-05 1991-05-08 Sfs Stadler Holding Ag, Heerbrugg, Ch
DE4131030C2 (de) * 1991-09-18 1995-05-24 Deutsche Aerospace Airbus Blindniet
GB9203251D0 (en) * 1992-02-15 1992-04-01 Emhart Inc Blind pin fixing
GB2330390B (en) * 1997-10-10 2001-10-17 Avdel Textron Ltd Blind riveting
WO1999062417A1 (fr) * 1998-06-04 1999-12-09 Synthes Ag Chur Rivet aveugle chirurgical dote d'un element de fermeture
GB2388063B (en) * 2002-04-23 2005-11-23 Emhart Llc Improved blind rivet

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US420829A (en) * 1890-02-04 Rivet
US1019723A (en) * 1910-10-04 1912-03-05 Diamond Expansion Bolt Co Expansion-bolt.
US2426422A (en) * 1945-02-15 1947-08-26 Carel T Torresen Method of making expandable rivets
US2586336A (en) * 1948-05-01 1952-02-19 Huck Mfg Co Apparatus for and method of making tubular rivet elements
US2592130A (en) * 1946-10-24 1952-04-08 Elastic Stop Nut Corp Insulating fastening device
US2635501A (en) * 1951-03-30 1953-04-21 Gen Motors Corp Hollow rivet
US2652741A (en) * 1950-08-04 1953-09-22 Cherry Rivet Company Blind rivet with clincher
US2963935A (en) * 1956-08-10 1960-12-13 John H Van Moss Jr Expanding anchor and plug with an exhaust passage

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US420829A (en) * 1890-02-04 Rivet
US1019723A (en) * 1910-10-04 1912-03-05 Diamond Expansion Bolt Co Expansion-bolt.
US2426422A (en) * 1945-02-15 1947-08-26 Carel T Torresen Method of making expandable rivets
US2592130A (en) * 1946-10-24 1952-04-08 Elastic Stop Nut Corp Insulating fastening device
US2586336A (en) * 1948-05-01 1952-02-19 Huck Mfg Co Apparatus for and method of making tubular rivet elements
US2652741A (en) * 1950-08-04 1953-09-22 Cherry Rivet Company Blind rivet with clincher
US2635501A (en) * 1951-03-30 1953-04-21 Gen Motors Corp Hollow rivet
US2963935A (en) * 1956-08-10 1960-12-13 John H Van Moss Jr Expanding anchor and plug with an exhaust passage

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3232161A (en) * 1961-08-22 1966-02-01 Ft Products Ltd Blind fasteners
US3192821A (en) * 1962-11-19 1965-07-06 Olympic Screw & Rivet Corp Blind rivet having a grooved and deformable locking boss
US3169256A (en) * 1963-03-11 1965-02-16 Olympic Screw & Rivet Corp Method of forming sleeve for lock rivet
US3292482A (en) * 1963-08-30 1966-12-20 Avdel Ltd Self-plugging blind fastening device
DE1450903B1 (de) * 1963-08-30 1972-05-31 Aerpat Ag Blindniet
US3217583A (en) * 1964-05-21 1965-11-16 Fulop Charles Unitary expansion anchor for bolts
US3276308A (en) * 1965-04-26 1966-10-04 Emric W Bergere Blind fasteners
US3515419A (en) * 1968-07-01 1970-06-02 Huck Mfg Co Container fastener
US3702088A (en) * 1971-03-31 1972-11-07 Boeing Co Double shank blind bolt
US3702087A (en) * 1971-03-31 1972-11-07 Boeing Co Double shank bolt
WO1985005414A1 (fr) * 1984-05-16 1985-12-05 The Bifurcated And Tubular Rivet Company Limited Rivets
GB2172951A (en) * 1984-05-16 1986-10-01 Bifurcated & Tubular Company L Rivets
US4958470A (en) * 1989-01-24 1990-09-25 Silver Metal Products, Inc. Elevated post anchor
DE10002223C1 (de) * 2000-01-20 2001-06-28 Eads Airbus Gmbh Heftblindniet aus Leichtmetall für den Flugzeugbau
US7485135B2 (en) 2000-09-07 2009-02-03 Synthes (U.S.A.) Device for fixing surgical implants
WO2002019931A1 (fr) * 2000-09-07 2002-03-14 Synthes Ag Chur Dispositif de fixation d'implants chirurgicaux
US20030199877A1 (en) * 2000-09-07 2003-10-23 Peter Steiger Device for fixing surgical implants
US20050145004A1 (en) * 2002-11-12 2005-07-07 Alessandro Vescovini Methods for the cold extrusion of metallic elements with dead or through holes and plant for carrying out said methods
US7347075B2 (en) * 2002-11-12 2008-03-25 Amafa Service S.R.L. Methods for the cold extrusion of metallic elements with dead or through holes and plant for carrying out said methods
EP1923580A3 (fr) * 2006-11-20 2010-04-21 Pias Sales Co., Ltd. Rivet aveugle de type pétale
US20100068001A1 (en) * 2006-11-30 2010-03-18 Sumanjit Singh Rivet
WO2008064875A1 (fr) * 2006-11-30 2008-06-05 Sumanjit Singh Rivet
CN101558247B (zh) * 2006-11-30 2011-09-21 休曼吉特·辛格 铆钉
US8348565B2 (en) * 2006-11-30 2013-01-08 Sumanjit Singh Rivet
US20080164109A1 (en) * 2006-12-06 2008-07-10 Audi Ag Composite brake disc
US11519471B2 (en) * 2017-08-02 2022-12-06 Robert Bosch Gmbh Brake disc and method for producing a brake disc
US11833576B2 (en) * 2018-08-03 2023-12-05 Atlas Copco Ias Uk Limited Riveting method

Also Published As

Publication number Publication date
NL248062A (fr)
NL106954C (fr) 1963-12-16
GB887799A (en) 1962-01-24
FR1243687A (fr) 1961-01-18
CH360251A (fr) 1962-02-15

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