WO1986005560A1 - Blind rivet stems and method of manufacturing the same - Google Patents
Blind rivet stems and method of manufacturing the same Download PDFInfo
- Publication number
- WO1986005560A1 WO1986005560A1 PCT/US1986/000483 US8600483W WO8605560A1 WO 1986005560 A1 WO1986005560 A1 WO 1986005560A1 US 8600483 W US8600483 W US 8600483W WO 8605560 A1 WO8605560 A1 WO 8605560A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- stem
- tail
- sleeve
- former
- rivet
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000005096 rolling process Methods 0.000 abstract description 10
- 238000001125 extrusion Methods 0.000 abstract description 8
- 238000010586 diagram Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000000418 atomic force spectrum Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
-
- 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
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J15/00—Riveting
- B21J15/10—Riveting machines
- B21J15/36—Rivet sets, i.e. tools for forming heads; Mandrels for expanding parts of hollow rivets
- B21J15/365—Mandrels for expanding parts of hollow rivets
Definitions
- the present invention relates to the field of blind fasteners and more particularly, to blind fasteners of high strength and high fatigue life as are used in aircraft manufacture and the like.
- U. S. Patent No. 4,012,984, entitled “Blind Rivet Assembly with Locking Collar on Rivet Stem” discloses a blind rivet assembly having a blind rivet stem extending through a hollow rivet so that it may be pulled, thereby to expand the tail of the hollow rivet.
- a collar on the stem has a head fitting in a locking groove within the grip length of the stem so that when the tail of the collar abuts a pressure element bearing aga-inst the head of the hollow rivet, it is bulged outwardly into a recess in the rivet head, thereby to interlock the rivet stem in the hollow rivet.
- a weakened portion, such as a break groove, is provided on the stem adjacent the bulged end of the collar whereby upon further pulling, the rivet stem breaks at the weakened portion, leaving the remaining part of the blind rivet assembly in the workpiece.
- Such a blind rivet assembly has found substantial uses in aircraft construction and other applications, and to some extent is displacing the market for blind rivet assemblies of earlier widely used designs, probably at least in part because of its repeatability of installation, thereby minimizing the number of rivets which must be drilled out and replaced. Because of the large number of such rivets currently being used and the use of such rivets in applications requiring maximum strength, cost and performance of rivets of this general type is of prime importance.
- the stem of the rivet has a shear ring thereon normally disposed adjacent the inner end of the tubular sleeve before pulling, with a tail former on the end of the stem adjacent the shear ring comprised of a conical section followed by a cylindrical section followed ultimately by a small flange-like shoulder collar to retain shear rings which inadvertently otherwise come loose.
- the shear ring shears from the rest of the stem and slides up the conical portion of the tail-former to further flare the tubular sleeve, finally coming to rest at some position along the cylindrical portion of the tail-former of the sleeve dependent primarily upon the thickness of material being joined in relation to the grip range of the rivet used.
- the tail-former portion of the stem is pulled well up into the portion of the sleeve within the hole through the parts being joined. Since the tail-former portion of the stem is larger in diameter than the inner diameter of the sleeve, and the sleeve initially substantially fills the hole in the parts and is otherwise constrained by the pulling tool, the movement of the tail-former into this region of the sleeve causes the extrusion of some sleeve material back out along the stem, thereby lifting the flared inner end of the sleeve away from the adjacent surface of the parts being joined, allowing the parts being joined to separate slightly under even nominal loads.
- blind rivet stems and method of making the same resulting in reduced cost in the fabrication of the rivet and increased strength in the installed rivet.
- the relief adjacent the shear ring on the tail-former end of the stem is formed by a rolling operation, with the cylindrical portion of the tail of the stem being knurled in the same or in a separate rolling operation.
- a shoulder collar may also be formed at the tail end of the stem prior to or subsequent to the rolling operation or operations.
- the knurled stem tail provides better gripping by the installed rivet and -increases the strength thereof by providing a relatively high and constant pull relatively independent of grip, and by tending to prevent the extrusion * o.f the tubular sleeve out of the hole in the parts being joined on the passage of the stem tail into the portion of the tubular sleeve within the hole, both due to the tendency of the knurled region to carry the sleeve material with it during drawing of the rivet, and for the further reason that the knurling provides a good grip on the shear ring and the end of the sleeve, yet has sufficient open spaces within which the sleeve material may extrude if required.
- Figure 1 is an illustration of a stem blank for a blind rivet assembly.
- Figure 2 is an illustration of the stem blank of Figure 1 illustrating the roll forming of the tail-former region immediately adjacent to the shear ring.
- Figure 3 is an illustration of the stem blank of Figure 2 after the roll forming of the knurled region 34 thereon.
- Figure 4 is an illustration of an alternate embodiment roll formed stem blank.
- Figure 5 is a view illustrating a rivet in accordance with the present invention prior to and after setting.
- Figure 6 is a view similar to Figure 5 illustrating a prior art rivet prior to and after setting.
- Figure 7 is a diagram illustrating the pulling force versus time for a rivet in accordance with the present invention with the locking collar thereof removed.
- Figure 8 is a diagram similar to Figure 7 for a prior art rive .
- a forired stem blank having a shear ring 20 separating the tail-former end 22 from the remainder of the stem, generally indicated by the numeral 24, may be seen.
- the formation of the portion 24 of the stem is generally in accordance with prior art forming methods for such stems and accordingly, will not be discussed in detail herein.
- this portion of the stem will be illustrated as a blank (in an unfinished condition) though it is to be understood that -this portion of the stem may in fact be completed before the tail-former portion.
- the first step in forming the tail-former end 22 of the blank is to form a tapered relief.26 of controlled depth by a rolling operation, using a roll forming tool shown. schematically in Figure 2 as roll 28.
- the depth of the tapered region 26 is preferably such that the diameter immediately adjacent the shear ring 20 is less than the diameter of the plug portion 30 adjacent the opposite side of the shear ring.
- the tapered region 26 may have a short cylindrical portion at the bottom of the taper immediately adjacent the shear ring 20 to better facilitate guaging of the finished parts, though it has been found that such a cylindrical portion is not required.
- the tail-former portion of the stem is formed by two rolling operations, one to provide the taper immediately adjacent the shear ring 20, and the second to knurl surface 34 to provide the desired surface texture, the purposes of which shall be subsequently described.
- these two rolling operations may be done in either order, or alternatively could be done simultaneously, depending upon the equipment and tooling used, though the successive rolling operations as described are preferred to first accurately form the tapered region and then provide the knurling without any significant effect on the dimensional accuracy of the taper.
- Figure 5 illustrates the present invention, the left half of the figure illustrating a complete rivet assembly inserted through pieces 36 and 38 to be joined prior to pulling, and the right side of the figure illustrating the same rivet after pulling.
- the specific rivet with which the invention is preferably used also utilizes a unique unitary locking collar generally indicated by the numeral 40, comprised of an upper portion 42 and a lower portion 44, the portions 42 and 44 being joined by a relatively thin intermediate section 46.
- the portion 42 has an internally tapered upper region 48 to encourage the flaring thereof when the rivet is being set.
- the rivet is set by pulling the upper pulling portion 50 of the stem with respect to a pressure washer 52, or alternately directly against the rivet sleeve by an appropriate pulling tool.
- the stem moves upward with respect to the rivet sleeve 54, the lower end 56 of the rivet sleeve first yields and bulges.
- shear ring 20 tends to move into the bulged rivet sleeve, then shears off of the stem and slides along the tapered region 26 to somewhat expand the shear ring and further flare the sleeve end.
- the final set rivet is as shown on the right hand side of Figure 5.
- any particular rivet will have a useful grip range dependent upon the general proportions and size of the rivet, the grip range being the range of total thickness of the parts being joined which may be adequately accommodated by the particular rivet. Accordingly, the nature of the bulge and the relative location of the various parts at the inner end of the set rivet will vary depending upon the thickness of the parts being joined in comparison to the limits of the grip range. If the total thickness of parts 36 and 38 is approaching the upper or larger limit of the grip range, the knurled region 34 and particularly the tapered region 26 of the stem typically will begin to pull well into the hole through the parts being joined before the pulling portion of the stem fractures at the end of the pull.
- the same need for movement or displacement of the region 66 of the sleeve is encountered.
- the extrusion of the sleeve material downward so as to lift the bulged lower end of the sleeve away from member 38 is inhibited by two factors.
- the knurled region 34 on the tail-former provides a greater upward force on the bulged lower end of the sleeve to encourage whatever extrusion does occur to result further up the sleeve to provide better hole filling of the sleeve.
- the portion of the knurled region 34 because of the open spaces in the knurl, provides some space for the sleeve to extrude into without downward movement of the bulged or formed lower end of the sleeve against the motion of the knurled surface.
- the present invention while resulting in a stem of substantially reduced cost, further results in an improved rivet, particularly when used at or near its maximum grip.
- the force versus time plot for the setting of a rivet in accordance with the present invention, but not having a locking collar thereon, may be seen in Figure 7.
- the force increases in region 68, representing an increasing load exerted on the sleeve 56 (see Figure 5) by the shear ring 20.
- region 70 the load or pulling force tends to level off or even decrease as yield in the sleeve forms the lower end thereof.
- the pulling .force steadily increases in region 72, until at point 74 the shear ring shears from the rest of the ste , resulting in a substantial drop in the pulling force required as the shear ring slides up the tapered region 26 and along the knurled area 34 of the tail-former.
- the force measured during this occurrence is represented by region 76, beginning in the area generally indicated by the numeral 78 and ending in the area generally indicated by the numeral 80 when the stem is stopped by the pulling tool, after which the pulling force steadily increases in region 82 until the stem breaks (point 84) at the breaking groove 86 (see Figure 5) .
- this region is the force required for further pulling of the stem after the shear ring shears rom the rest of the ste at point 78 and prior to the engagement of the stem with the pressure washer and/or the anvil of the pulling tool at point 80.
- the force at any point along regions 76 and 76a is at least somewhat indicative of the holding force of the formed inner end of the rivet, as failure of the inner end of the rivet by separation of the materials being joined will cause a stretching or deformation of the sleeve, and further motion of the shear ring along the tail-former in accordance with the force curves.
- this force in general is higher and more uniform for rivets in accordance with the present invention than it is for prior art rivets, thereby indicating a stronger formed inner end of the rivet throughout the grip range for rivets in accordance with the present invention over those of the prior art.
- the force required for pulling in region 76 of Figure 7 has a rather cyclical variation around a rather uniform average, which variation appears relatively regular in terms of time period.
- the regularity of a conventional knurl for region 34 as shown in Figure 3 provides some regular steps in accordance with the size of the knurl, giving rise to this regular variation in force.
- the knurled region 34 may be formed with a knurl characterized by a different leads in the clockwise and counterclockwise directions, as shown by the knurled region 34a in the embodiment of Figure 4. This has the effect of breaking up the regularity of the knurled pattern which, it is believed, will tend to reduce the variation of pulling force along region 76 of Figure 7, providing a further improvement to the holding power of the set rivet.
- One variation of the prior art rivet of Figure 6 utilizes circular grooves in the surface of region 86 of the stem tail formed by a machining operation, apparently intended to better restrict the sliding of the shear ring thereon.
- the corresponding pulling force for such rivets when plotted as in Figures 7 and 8, shows a very high amplitude variation in pulling force along the equivalent of region 76a as each new step is encountered.
- the problem with such a machined surface is that depending upon the specific grip on which the rivet is being used, there can be no assurance as to where the shear ring will stop with respect to the tail-former, thereby providing no assurance as to what the true force will be within the relatively high variation encountered in this region for such a tail design.
- the roll forming eliminates the restriction of a generated surface as the surface of the tail-former, allowing the knurling and even the knurling with different leads in the two directions to provide the desired random surface, giving rise to all the advantages hereinbefore stated and at the same time substantially reducing the manufacturing cost of the stems.
- a shoulder collar such as shoulder collar 88 ( Figure 4) may be formed in the end of the stem such as by upsetting the end of the stem preferably prior to roll forming the tapered region 26 and knurled region 34.
- This shoulder collar normally would be a circular collar to ultimately retain a shear ring which otherwise came loose, though the knurling of the present invention provides sufficient shear ring retention so as to generally render a shoulder collar unnecessary.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US71047785A | 1985-03-11 | 1985-03-11 | |
US710,477 | 1985-03-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1986005560A1 true WO1986005560A1 (en) | 1986-09-25 |
Family
ID=24854197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1986/000483 WO1986005560A1 (en) | 1985-03-11 | 1986-03-10 | Blind rivet stems and method of manufacturing the same |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0214284A1 (en) |
WO (1) | WO1986005560A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1989007205A1 (en) * | 1984-09-04 | 1989-08-10 | Allfast Fastening Systems, Inc. | Improved locking apparatus for blind fasteners |
WO2003058078A1 (en) * | 2001-12-27 | 2003-07-17 | Huck International, Inc. | Blind fastener with a blind side head having a clamp support and lock section |
GB2446815A (en) * | 2006-12-20 | 2008-08-27 | Textron Fastening Syst Ltd | Blind stud insert |
Citations (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US788516A (en) * | 1904-07-16 | 1905-05-02 | Trimont Mfg Company | Nurling-machine. |
US1798738A (en) * | 1930-01-13 | 1931-03-31 | Wilcox Rich Corp | Ball and socket joint and method of making same |
US1803803A (en) * | 1930-02-03 | 1931-05-05 | Kaufman Charles | Process of making screws and bolts |
US2283494A (en) * | 1940-07-22 | 1942-05-19 | Nat Screw & Mfg Company | Method of making screw and washer assemblies |
US2359997A (en) * | 1941-02-27 | 1944-10-10 | Bendix Aviat Corp | Knurling tool |
US2501567A (en) * | 1944-05-19 | 1950-03-21 | Huck Mfg Co | Rivet |
US2579611A (en) * | 1949-02-03 | 1951-12-25 | John E Poorman | Knurling tool |
US2645953A (en) * | 1948-06-02 | 1953-07-21 | Michael J Schlitters | Knurling and burnishing tool holder |
US2684604A (en) * | 1950-09-21 | 1954-07-27 | Jr Charles Henry Froberg | Universal knurling tool |
US3052278A (en) * | 1959-02-25 | 1962-09-04 | Western Electric Co | Devices for forming grooves in articles |
US3202036A (en) * | 1961-05-09 | 1965-08-24 | Nat Screw & Mfg Company | Blind fastener |
US3203303A (en) * | 1964-08-10 | 1965-08-31 | Nat Screw & Mfg Company | Blind fastener |
US3292482A (en) * | 1963-08-30 | 1966-12-20 | Avdel Ltd | Self-plugging blind fastening device |
US3302510A (en) * | 1964-11-27 | 1967-02-07 | Textron Ind Inc | Die-draw blind rivet with non-deforming die |
US3390601A (en) * | 1965-08-12 | 1968-07-02 | Avdel Ltd | Blind fastening devices |
US3405594A (en) * | 1964-12-11 | 1968-10-15 | Boeing Co | Rivet joining method, pin therefor and pin manufacturing method |
US3489056A (en) * | 1967-10-02 | 1970-01-13 | Vsi Corp | Blind rivet |
US3611769A (en) * | 1969-05-06 | 1971-10-12 | Vyzk Ustav Tvarecich Stroju | Method and apparatus for shaping bar stock by rolling |
US3657957A (en) * | 1969-11-24 | 1972-04-25 | Olympic Screw & Rivet Corp | Rivet |
US3827269A (en) * | 1972-11-06 | 1974-08-06 | Gen Motors Corp | Roll forming apparatus |
US3866998A (en) * | 1973-08-30 | 1975-02-18 | Sealectro Corp | Conductive terminal for flexible circuit boards |
US3869896A (en) * | 1972-06-26 | 1975-03-11 | Xerox Corp | Rolling process |
US3937123A (en) * | 1974-04-08 | 1976-02-10 | Textron Inc. | Blind fastener with shear washer |
US4012984A (en) * | 1975-06-19 | 1977-03-22 | Textron, Inc. | Blind rivet assembly with locking collar on rivet stem |
US4230017A (en) * | 1978-10-12 | 1980-10-28 | Huck Manufacturing Company | Pull-type blind fastener construction |
US4312613A (en) * | 1979-05-11 | 1982-01-26 | Binns Lloyd Sylvester | Blind rivet assembly |
GB2095355A (en) * | 1981-03-20 | 1982-09-29 | Hilti Ag | Securing anchor rods in boreholes |
US4365495A (en) * | 1977-01-13 | 1982-12-28 | Aerpat A.G. | Method of making a mandrel for a self plugging blind rivet |
EP0084641A1 (en) * | 1981-12-28 | 1983-08-03 | SPS TECHNOLOGIES, Inc. | Blind fastener assembly |
-
1986
- 1986-03-10 EP EP19860902140 patent/EP0214284A1/en not_active Withdrawn
- 1986-03-10 WO PCT/US1986/000483 patent/WO1986005560A1/en not_active Application Discontinuation
Patent Citations (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US788516A (en) * | 1904-07-16 | 1905-05-02 | Trimont Mfg Company | Nurling-machine. |
US1798738A (en) * | 1930-01-13 | 1931-03-31 | Wilcox Rich Corp | Ball and socket joint and method of making same |
US1803803A (en) * | 1930-02-03 | 1931-05-05 | Kaufman Charles | Process of making screws and bolts |
US2283494A (en) * | 1940-07-22 | 1942-05-19 | Nat Screw & Mfg Company | Method of making screw and washer assemblies |
US2359997A (en) * | 1941-02-27 | 1944-10-10 | Bendix Aviat Corp | Knurling tool |
US2501567A (en) * | 1944-05-19 | 1950-03-21 | Huck Mfg Co | Rivet |
US2645953A (en) * | 1948-06-02 | 1953-07-21 | Michael J Schlitters | Knurling and burnishing tool holder |
US2579611A (en) * | 1949-02-03 | 1951-12-25 | John E Poorman | Knurling tool |
US2684604A (en) * | 1950-09-21 | 1954-07-27 | Jr Charles Henry Froberg | Universal knurling tool |
US3052278A (en) * | 1959-02-25 | 1962-09-04 | Western Electric Co | Devices for forming grooves in articles |
US3202036A (en) * | 1961-05-09 | 1965-08-24 | Nat Screw & Mfg Company | Blind fastener |
US3292482A (en) * | 1963-08-30 | 1966-12-20 | Avdel Ltd | Self-plugging blind fastening device |
US3203303A (en) * | 1964-08-10 | 1965-08-31 | Nat Screw & Mfg Company | Blind fastener |
US3302510A (en) * | 1964-11-27 | 1967-02-07 | Textron Ind Inc | Die-draw blind rivet with non-deforming die |
US3405594A (en) * | 1964-12-11 | 1968-10-15 | Boeing Co | Rivet joining method, pin therefor and pin manufacturing method |
US3390601A (en) * | 1965-08-12 | 1968-07-02 | Avdel Ltd | Blind fastening devices |
US3489056A (en) * | 1967-10-02 | 1970-01-13 | Vsi Corp | Blind rivet |
US3611769A (en) * | 1969-05-06 | 1971-10-12 | Vyzk Ustav Tvarecich Stroju | Method and apparatus for shaping bar stock by rolling |
US3657957A (en) * | 1969-11-24 | 1972-04-25 | Olympic Screw & Rivet Corp | Rivet |
US3869896A (en) * | 1972-06-26 | 1975-03-11 | Xerox Corp | Rolling process |
US3827269A (en) * | 1972-11-06 | 1974-08-06 | Gen Motors Corp | Roll forming apparatus |
US3866998A (en) * | 1973-08-30 | 1975-02-18 | Sealectro Corp | Conductive terminal for flexible circuit boards |
US3937123A (en) * | 1974-04-08 | 1976-02-10 | Textron Inc. | Blind fastener with shear washer |
US4012984A (en) * | 1975-06-19 | 1977-03-22 | Textron, Inc. | Blind rivet assembly with locking collar on rivet stem |
US4365495A (en) * | 1977-01-13 | 1982-12-28 | Aerpat A.G. | Method of making a mandrel for a self plugging blind rivet |
US4230017A (en) * | 1978-10-12 | 1980-10-28 | Huck Manufacturing Company | Pull-type blind fastener construction |
US4312613A (en) * | 1979-05-11 | 1982-01-26 | Binns Lloyd Sylvester | Blind rivet assembly |
GB2095355A (en) * | 1981-03-20 | 1982-09-29 | Hilti Ag | Securing anchor rods in boreholes |
EP0084641A1 (en) * | 1981-12-28 | 1983-08-03 | SPS TECHNOLOGIES, Inc. | Blind fastener assembly |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1989007205A1 (en) * | 1984-09-04 | 1989-08-10 | Allfast Fastening Systems, Inc. | Improved locking apparatus for blind fasteners |
US4919576A (en) * | 1984-09-04 | 1990-04-24 | Allfast Fastening Systems, Inc. | Locking apparatus for blind fasteners |
WO2003058078A1 (en) * | 2001-12-27 | 2003-07-17 | Huck International, Inc. | Blind fastener with a blind side head having a clamp support and lock section |
AU2002346646B2 (en) * | 2001-12-27 | 2005-07-21 | Huck International, Inc. | Blind fastener with a blind side head having a clamp support and lock section |
CN100406755C (en) * | 2001-12-27 | 2008-07-30 | 赫克国际公司 | Blind fastener with a blind side head having a clamp support and lock section |
GB2446815A (en) * | 2006-12-20 | 2008-08-27 | Textron Fastening Syst Ltd | Blind stud insert |
GB2446815B (en) * | 2006-12-20 | 2009-02-25 | Textron Fastening Syst Ltd | Blind stud insert |
US8444356B2 (en) | 2006-12-20 | 2013-05-21 | Avdel Uk Limited | Blind stud insert |
Also Published As
Publication number | Publication date |
---|---|
EP0214284A1 (en) | 1987-03-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2501567A (en) | Rivet | |
US3065661A (en) | Blind rivet having a bore defined by a plurality of flat walls | |
EP0398512B1 (en) | Blind rivet | |
US4531871A (en) | Multigrip fastener | |
JPH0141846B2 (en) | ||
US4996860A (en) | Method and apparatus for manufacturing anchor bolts for concrete | |
EP1086316B1 (en) | Method of forming a tubular member | |
EP1173680B1 (en) | Blind fastener with high strength blind head and high clamp and high shear load resistance | |
GB2177770A (en) | Self-plugging blind fastener | |
US5957777A (en) | Method of manufacturing fasteners | |
US6428255B1 (en) | Blind rivet | |
US6854940B2 (en) | Closed-end blind rivet with a crimped shank and method of manufacture thereof | |
US5252013A (en) | Self-plugging blind rivet | |
US20020119024A1 (en) | Blind rivet | |
US4919576A (en) | Locking apparatus for blind fasteners | |
US4936725A (en) | Blind shear-ring fastener and method | |
US5131107A (en) | Method of making a blind fastener | |
US5052870A (en) | Bulb fastener | |
WO1986005560A1 (en) | Blind rivet stems and method of manufacturing the same | |
US5056973A (en) | Bulb fastener | |
WO2006008268A1 (en) | A blind rivet | |
EP0766012B1 (en) | Blind rivet assembly | |
US20050152763A1 (en) | Blind rivet and method to make same | |
US3194106A (en) | Blind rivet assembly | |
EP1497565B1 (en) | Blind rivet |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): DE GB JP |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LU NL SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1986902140 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1986902140 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1986902140 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |