US3882756A - Self piercing structural fastener having a working transition section - Google Patents
Self piercing structural fastener having a working transition section Download PDFInfo
- Publication number
- US3882756A US3882756A US356934A US35693473A US3882756A US 3882756 A US3882756 A US 3882756A US 356934 A US356934 A US 356934A US 35693473 A US35693473 A US 35693473A US 3882756 A US3882756 A US 3882756A
- Authority
- US
- United States
- Prior art keywords
- main body
- fastener
- diameter
- transition section
- threaded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000007704 transition Effects 0.000 title claims abstract description 40
- 239000000463 material Substances 0.000 claims description 23
- 238000001125 extrusion Methods 0.000 abstract description 8
- 239000002184 metal Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000789 fastener Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
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
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
- F16B25/0042—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw
- F16B25/0057—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw characterised by the geometry of the thread, the thread being a ridge wrapped around the shaft of the screw the screw having distinct axial zones, e.g. multiple axial thread sections with different pitch or thread cross-sections
-
- 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
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/001—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed
- F16B25/0031—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by the material of the body into which the screw is screwed the screw being designed to be screwed into different materials, e.g. a layered structure or through metallic and wooden parts
-
- 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
- F16B25/00—Screws that cut thread in the body into which they are screwed, e.g. wood screws
- F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
Definitions
- the contour of the working transition section is such as to blend gradually into the larger main body portion gzffg 85/41 of the fastener from the relatively small, self piercing 3:094:895 6/l963 Broberg 85/47 plot FOREIGN PATENTS OR APPLICATIONS 2 Claims, 1 Drawing Figure 1,150,769 4/l969 United Kingdom 85/46 7 C /6c 47 E fie /6 F a /6b L 1 SELF PIERCING STRUCTURAL FASTENER HAVING A WORKING TRANSITION SECTION CROSS REFERENCE TO RELATED APPLICATIONS AND INVENTIONS
- the self piercing fastener of this invention is particularly suited for connecting heavier structural members to lighter gauge members or panels.
- a supplementary nut may or may not be used.
- the fastener is completely self locating into a hole extruded in the lighter gauge panel in the region of the pierced hole initiated by the pilot point. This presents an optimum condition for building connections.
- the fastener of this invention utilizes a pilot point the diameter of which is quite small in relationship to the diameter of the fastener body. This small pilot point removes a minimum of metal.
- the initial hole so produced is one enlarged by extrusion a stretching of the metal.
- the fastener may be modified by arranging the threads of the fastener body so as to achieve the maximum differential between the major and minor diameters thereof. In some instances it may be desirable to employ a nut in which case the nut is provided with a special mating thread; such a nut is usually employed only where maximum design requirements must be met.
- the relatively deep threads of the main body portion of the fastener, cooperating with the hole as enlarged by the extrusion function of the transition section, are sufficient to effect the fastening desired.
- the heavy gauge member will be provided with a preformed clearance hole of sufficient diameter to permit the threaded fastener body to pass therethrough into the hole extruded in the lighter gauge metal by the working transition section of the fastener.
- This working transition section may also be threaded, even deep threaded.
- the major and minor diameters of the threaded working transition section will taper from adjacent the pilot drill point to the threaded fastener body, both of these diameters blending respectively with the major and minor diameters of such main fastener body.
- the drawing comprises a single FIGURE showing the fastener of this invention in position to fasten a heavier gauge member to two lighter gauge members; parts of the FIGURE are shown in section and others are diagrammatically illustrated by dotted lines.
- the fastener of this invention is generally indicated at 10. It comprises a washer head 11, a threaded fastener body 12, a working transition section 13 and a drill point 14.
- the fastener is shown as holding a heavy gauge structural member 15 to two lighter gauge panels 16a and 16b.
- the nominal or major diameter of the fastener is indicated at 17 and the minor or root diameter of such fastener is indicated at 18.
- the pitch dimension is indicated at 19.
- the hole extruded in the light gauge panel is indicated at 20 and the clearance hole provided in the heavy gauge structural member is indicated at 21.
- the diameter of the drill point 14 is relatively small and should not exceed about one-half the nominal or major diameter 17 of the fastener body 12.
- the minor or root diameter 18 of the fastener body 12 should be approximately 1% times the diameter of the drill point 14. Thus the minor or root diameter 18 of the fastener body 12 should be about 66% or about two-thirds of the major diameter 17.
- the pitch dimension 19 of the fastener body 12 should be sufficient to cooperatively receive the total thickness of the light gauge panel or panels into which the fastener is threaded, such total thickness including the extruded portion 160, whereby the extruded material will be in intimate contact with the root diameter 18 of the fastener body 12.
- the extruded portion strengthens the lighter gauge panel or panels in the region of the hole 20 thereby increasing the resistance to the fastener pulling out.
- the length of the transition section should not be less than the diameter of the drill point to provide a desirable entry angle therebetween for extruding the light gauge material.
- the major and minor diameters of the threads of such transition section should,taper so as, moving from the drill point 14 to the fastener body 12, to blend with the major and minor diameters l7 and 18 of such fastener body respectively.
- Portions of the tapered major and minor diameters of the working transition section 13 are indicated at 13a and 13b respectively.
- the fastener of this invention is designed with a relatively small pilot point and a transition section which extrudes a proper sized hole so as to lead the main body of the fastener into the pilot hole with minimum pressure.
- the body of the fastener may be deep threaded as illustrated to such extent that the relationship of the major diameter and minor diameter will in fact produce sufficient interference so that, within certain design load limit conditions, a nut is not required. If conditions so dictate, however, a nut having threads to mate with those of the body of the fastener may be employed.
- transition section made up of the tapered threads 13a and tapered body 13b, working in the small pilot hole pierced by the pilot drill, extrudes a hole of sufficient size to receive the threaded body portion 12 of the fastener. Although such extrusion could be accomplished by the body portion 13b alone, thus eliminating the tapered threads 13a, it has been determined that best results are achieved when both of the tapered sections 13a and 13b are employed.
- the transition section could be some sort of metal removing section, such as a reamer, although it has been found much more preferable to remove as little material as possible in the transition from initial pierce to that hole size which will cooperatively receive the threaded body portion 12 of the fastener.
- metal removing section such as a reamer
- other known fasteners are generally smaller and employed either to fasten light gauge materials to heavy gauge materials or to fasten light gauge materials to light gauge materials; such other fasteners, therefore, re move so much of the metal as to permit the fastener to pass through the hole with little interruption.
- Use of a nut is usually mandatory in those cases. This is not the kind of action and relationship sought by practicing this invention in its preferred form.
- the self piercing structural fastener incorporating the working transition section of this invention removes a minimum amount of metal and to this end the diameter of the pilot point is small in relationship to the nominal diameter of the fastener body.
- the hole so initially pierced is then enlarged by the working transition section which stretch-extrudes the metal in the region of the pierced hole.
- the threads of the fastener body 12 should have a maximum differential between the major and minor diameters thereof.
- a nut, especially threaded to mate with the threads of the fastener body 12, may be employed in extreme conditions.
- a self piercing structural fastener for fastening relatively heavy gauge material to relatively light gauge material, comprising a threaded main body having constant major and root diameters of the thread of said threaded main body, said root diameter being about two-thirds of said major diameter, a drill point for initially piercing the light gauge material and the diameter of which drill point does not exceed approximately one-half the said major diameter of the said threaded main body, a tapered and threaded working transition section extending between said drill point and said main body, the length of said transition being at least the dimension of the said drill point diameter, the major and root diameters of the thread of said tapered and threaded transition section increasing gradually and uniformly from the said drill point diameter throughout the said transition section so as to blend respectively with the major and root diameters of said threaded main body, the said root diameter of said threaded main body being approximately one and onethird times the said diameter of said drill point, whereby said light gauge material is stretch-extruded as said transition section passes through the hole initially pierce
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Insertion Pins And Rivets (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
Description
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US356934A US3882756A (en) | 1971-08-12 | 1973-05-03 | Self piercing structural fastener having a working transition section |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US17125571A | 1971-08-12 | 1971-08-12 | |
US356934A US3882756A (en) | 1971-08-12 | 1973-05-03 | Self piercing structural fastener having a working transition section |
Publications (1)
Publication Number | Publication Date |
---|---|
US3882756A true US3882756A (en) | 1975-05-13 |
Family
ID=26866891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US356934A Expired - Lifetime US3882756A (en) | 1971-08-12 | 1973-05-03 | Self piercing structural fastener having a working transition section |
Country Status (1)
Country | Link |
---|---|
US (1) | US3882756A (en) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4384403A (en) * | 1980-08-18 | 1983-05-24 | Sheldon Robert W | Building erection tool |
US4477217A (en) * | 1981-06-01 | 1984-10-16 | Rockford Products Corporation | Drill and thread forming screw |
US4621963A (en) * | 1984-03-26 | 1986-11-11 | Elco Industries, Inc. | Fastener for roof assemblies and the like |
US4753057A (en) * | 1985-02-27 | 1988-06-28 | Hormann Kg Amshausen | Length of section for framing the leaf of a gate or door |
GB2202603A (en) * | 1987-03-19 | 1988-09-28 | Sharp Kk | Support structure |
US4952110A (en) * | 1989-10-13 | 1990-08-28 | Ring Screw Works, Inc. | Anti-cross thread screw |
US5012624A (en) * | 1989-06-19 | 1991-05-07 | Dahlgren Steven W | Method and apparatus for installing wire anchors for suspended ceilings |
US5361478A (en) * | 1989-03-23 | 1994-11-08 | Ejot Eberhard Jaeger Gmbh & Co. Kg | Method of inserting a hole forming and selftapping screw |
US5728116A (en) * | 1994-01-13 | 1998-03-17 | Ethicon, Inc. | Spiral surgical tack |
US5947670A (en) * | 1996-09-20 | 1999-09-07 | Illinois Tool Works Inc. | Self-drilling fastener |
US6176664B1 (en) | 1997-11-20 | 2001-01-23 | W A Deutsher Pty Ltd | Fastening screw and method of forming same |
US20060241622A1 (en) * | 2003-06-13 | 2006-10-26 | Zergiebel Earl M | Multiple member interconnect for surgical instrument and absorbable screw fastener |
US20080281336A1 (en) * | 2003-06-13 | 2008-11-13 | Zergiebel Earl M | Multiple member interconnect for surgical instrument and absorbable screw fastener |
US20090104001A1 (en) * | 2007-10-19 | 2009-04-23 | Kochheiser Michael A | Non-dimpling fastener |
US20110103917A1 (en) * | 2009-11-02 | 2011-05-05 | Illinois Tool Works Inc. | Self-Drilling Fastener |
US20130058736A1 (en) * | 2011-09-02 | 2013-03-07 | Jed Auchey | Drivable eye bolt |
US9518599B2 (en) * | 2014-04-10 | 2016-12-13 | Simpson Strong-Tie Company, Inc. | Metal to metal fastener |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1114135A (en) * | 1913-12-08 | 1914-10-20 | Theodor B Hafertep | Method of fastening sheet material. |
US2703419A (en) * | 1951-03-06 | 1955-03-08 | Barth Corp | Method and tool for swaging internal threads |
US3094895A (en) * | 1961-02-28 | 1963-06-25 | Elco Tool And Screw Corp | Combination piercing, reaming and tapping screw |
-
1973
- 1973-05-03 US US356934A patent/US3882756A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1114135A (en) * | 1913-12-08 | 1914-10-20 | Theodor B Hafertep | Method of fastening sheet material. |
US2703419A (en) * | 1951-03-06 | 1955-03-08 | Barth Corp | Method and tool for swaging internal threads |
US3094895A (en) * | 1961-02-28 | 1963-06-25 | Elco Tool And Screw Corp | Combination piercing, reaming and tapping screw |
Cited By (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4384403A (en) * | 1980-08-18 | 1983-05-24 | Sheldon Robert W | Building erection tool |
US4477217A (en) * | 1981-06-01 | 1984-10-16 | Rockford Products Corporation | Drill and thread forming screw |
US4621963A (en) * | 1984-03-26 | 1986-11-11 | Elco Industries, Inc. | Fastener for roof assemblies and the like |
US4753057A (en) * | 1985-02-27 | 1988-06-28 | Hormann Kg Amshausen | Length of section for framing the leaf of a gate or door |
US4888460A (en) * | 1987-03-19 | 1989-12-19 | Sharp Kabushiki Kaisha | Fixing structure for components of a cooking appliance |
AU590987B2 (en) * | 1987-03-19 | 1989-11-23 | Sharp Kabushiki Kaisha | Support structure of heating chamber of cooking appliance |
GB2202603A (en) * | 1987-03-19 | 1988-09-28 | Sharp Kk | Support structure |
GB2202603B (en) * | 1987-03-19 | 1990-11-14 | Sharp Kk | Appliance |
US5361478A (en) * | 1989-03-23 | 1994-11-08 | Ejot Eberhard Jaeger Gmbh & Co. Kg | Method of inserting a hole forming and selftapping screw |
US5012624A (en) * | 1989-06-19 | 1991-05-07 | Dahlgren Steven W | Method and apparatus for installing wire anchors for suspended ceilings |
US4952110A (en) * | 1989-10-13 | 1990-08-28 | Ring Screw Works, Inc. | Anti-cross thread screw |
US5728116A (en) * | 1994-01-13 | 1998-03-17 | Ethicon, Inc. | Spiral surgical tack |
US5947670A (en) * | 1996-09-20 | 1999-09-07 | Illinois Tool Works Inc. | Self-drilling fastener |
US6176664B1 (en) | 1997-11-20 | 2001-01-23 | W A Deutsher Pty Ltd | Fastening screw and method of forming same |
US20060241622A1 (en) * | 2003-06-13 | 2006-10-26 | Zergiebel Earl M | Multiple member interconnect for surgical instrument and absorbable screw fastener |
US9788833B2 (en) | 2003-06-13 | 2017-10-17 | Covidien Lp | Multiple member interconnect for surgical instrument and absorbable screw fastener |
US7670362B2 (en) | 2003-06-13 | 2010-03-02 | Tyco Healthcare Group Lp | Multiple member interconnect for surgical instrument and absorbable screw fastener |
US20100191294A1 (en) * | 2003-06-13 | 2010-07-29 | Tyco Healthcare Group Lp | Multiple member interconnect for surgical instrument and absorbable screw fastener |
US20080281336A1 (en) * | 2003-06-13 | 2008-11-13 | Zergiebel Earl M | Multiple member interconnect for surgical instrument and absorbable screw fastener |
US8292933B2 (en) | 2003-06-13 | 2012-10-23 | Tyco Healthcare Group Lp | Multiple member interconnect for surgical instrument and absorbable screw fastener |
US10070860B2 (en) | 2003-06-13 | 2018-09-11 | Covidien Lp | Multiple member interconnect for surgical instrument and absorbable screw fastener |
US9987010B2 (en) | 2003-06-13 | 2018-06-05 | Covidien Lp | Multiple member interconnect for surgical instrument and absorbable screw fastener |
US8926637B2 (en) | 2003-06-13 | 2015-01-06 | Covidien Lp | Multiple member interconnect for surgical instrument and absorbable screw fastener |
US9259221B2 (en) | 2003-06-13 | 2016-02-16 | Covidien Lp | Multiple member interconnect for surgical instrument and absorbable screw fastener |
US9364274B2 (en) | 2003-06-13 | 2016-06-14 | Covidien Lp | Multiple member interconnect for surgical instrument and absorbable screw fastener |
US20090104001A1 (en) * | 2007-10-19 | 2009-04-23 | Kochheiser Michael A | Non-dimpling fastener |
US8419332B2 (en) * | 2007-10-19 | 2013-04-16 | Atlas Bolt & Screw Company Llc | Non-dimpling fastener |
US20110103917A1 (en) * | 2009-11-02 | 2011-05-05 | Illinois Tool Works Inc. | Self-Drilling Fastener |
US8408856B2 (en) * | 2009-11-02 | 2013-04-02 | Illinois Tool Works Inc. | Self-drilling fastener |
US20130058736A1 (en) * | 2011-09-02 | 2013-03-07 | Jed Auchey | Drivable eye bolt |
US9518599B2 (en) * | 2014-04-10 | 2016-12-13 | Simpson Strong-Tie Company, Inc. | Metal to metal fastener |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ARMCO ATLANTIC, INC., P.O. BOX 4665622, CINCINNATI Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ARMCO INC.;REEL/FRAME:004433/0041 Effective date: 19850715 |
|
AS | Assignment |
Owner name: FIRST NATIONAL BANK OF CHICAGO, THE Free format text: SECURITY INTEREST;ASSIGNOR:ARMCO ATLANTIC, INC.;REEL/FRAME:004594/0698 Effective date: 19860703 Owner name: FIRST NATIONAL BANK OF CHICAGO, THE,ILLINOIS Free format text: SECURITY INTEREST;ASSIGNOR:ARMCO ATLANTIC, INC.;REEL/FRAME:004594/0698 Effective date: 19860703 |
|
AS | Assignment |
Owner name: GLENFED CAPITAL CORP., THREE FIRST NATIONAL PLAZA, Free format text: SECURITY INTEREST;ASSIGNOR:BUILDING TECHNOLOGIES CORPORATION;REEL/FRAME:004754/0575 Effective date: 19870724 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES) |
|
AS | Assignment |
Owner name: FIRST NATIONAL BANK OF BOSTON, THE, 100 FEDERAL ST Free format text: SECURITY INTEREST;ASSIGNOR:BUILDING TECHNOLOGIES CORPORATION;REEL/FRAME:004841/0816 Effective date: 19871217 Owner name: FIRST NATIONAL BANK OF BOSTON, THE,MASSACHUSETTS Free format text: SECURITY INTEREST;ASSIGNOR:BUILDING TECHNOLOGIES CORPORATION;REEL/FRAME:004841/0816 Effective date: 19871217 |
|
AS | Assignment |
Owner name: BTC ACQUISITION CORP., A CORP. OF DE, OHIO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BUILDING TECHNOLOGIES CORPORATION;REEL/FRAME:005197/0368 Effective date: 19890530 |
|
AS | Assignment |
Owner name: SECURITY PACIFIC BUSINESS CREDIT INC., CALIFORNIA Free format text: SECURITY INTEREST;ASSIGNOR:BTC ACQUISITION CORP.;REEL/FRAME:005250/0918 Effective date: 19900213 |
|
AS | Assignment |
Owner name: STEELOX SYSTEMS INC. A DE CORPORATION Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BUILDING TECHNOLOGIES CORPORATION, A DE CORPORATION;REEL/FRAME:005996/0905 Effective date: 19911213 Owner name: BUILDING TECHNOLOGIES CORPORATION A CORP. OF DEL Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SECURITY PACIFIC BUSINESS CREDIT INC. A CORP. OF DELAWARE;REEL/FRAME:006002/0313 Effective date: 19911213 Owner name: STEELOX SYSTEMS INC., STATELESS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BUILDING TECHNOLOGIES CORPORATION, A DE CORPORATION;REEL/FRAME:005996/0905 Effective date: 19911213 |