GB1316157A - Self-drilling screws - Google Patents
Self-drilling screwsInfo
- Publication number
- GB1316157A GB1316157A GB3762870A GB3762870A GB1316157A GB 1316157 A GB1316157 A GB 1316157A GB 3762870 A GB3762870 A GB 3762870A GB 3762870 A GB3762870 A GB 3762870A GB 1316157 A GB1316157 A GB 1316157A
- Authority
- GB
- United Kingdom
- Prior art keywords
- angle
- axis
- self
- symmetry
- point
- 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
Links
- 238000005553 drilling Methods 0.000 title abstract 3
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
- F16B25/10—Screws performing an additional function to thread-forming, e.g. drill screws or self-piercing screws
-
- 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
- F16B25/0036—Screws that cut thread in the body into which they are screwed, e.g. wood screws characterised by geometric details of the screw
- F16B25/0084—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 geometric details of the tip
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Drilling Tools (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
1316157 Self-drilling screws SCHRAUBENKOMBINAT VEB 4 Aug 1970 37628/70 Headings B3C and B3N A self-drilling screw comprises a threadless shaft portion 5 which is initially cylindrical and then tapers outwardly to the maximum diameter of a drill point 6 which has an obtuse point angle when viewed in Fig. 1, the drill point has opposite flat portions 17 which extend to the end of the drill point and form cutting edges 10, 13, spiral grooves 14 extend from the cutting edges into the threadless shaft portions, each flat portion comprises a first part 9 at an angle B2 to a normal to the axis of the screw and a second part 12 at an angle B 1 . The distance a 2 between the cutting edges and an axis of symmetry is greater than the distance a 1 between the point of intersection of the spiral grooves and the flat portions 17 and an axis of symmetry. The angle of a flat portion 17 to the axis of symmetry is α which is designed as an obtuse angle.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD14460369A DD83671A1 (en) | 1969-12-23 | 1969-12-23 | Bohrtreibschraube |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1316157A true GB1316157A (en) | 1973-05-09 |
Family
ID=5481999
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3762870A Expired GB1316157A (en) | 1969-12-23 | 1970-08-04 | Self-drilling screws |
Country Status (5)
Country | Link |
---|---|
CS (1) | CS149944B2 (en) |
DD (1) | DD83671A1 (en) |
DE (1) | DE2060051A1 (en) |
GB (1) | GB1316157A (en) |
HU (1) | HU166499B (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4064784A (en) * | 1975-05-01 | 1977-12-27 | Adler Robert B | Drill tip and threaded fastener |
US4407620A (en) * | 1979-12-29 | 1983-10-04 | Yugen Kaisha Shinjoseisakusho | Drill screw |
US4586862A (en) * | 1981-01-12 | 1986-05-06 | Katsuhisa Yamasaki | Drilling screw |
US4599024A (en) * | 1978-01-18 | 1986-07-08 | Kabushiki Kaisha Yamashina Seikosho | Entering end portion of drill screw |
DE3626627A1 (en) * | 1985-08-14 | 1987-02-19 | Usm Corp | FASTENERS |
US4708557A (en) * | 1986-02-12 | 1987-11-24 | Fuji Tec Co., Ltd. | Drill screw |
US4787792A (en) * | 1985-08-14 | 1988-11-29 | Usm Corporation | Drill screw |
US4793756A (en) * | 1985-10-24 | 1988-12-27 | Sfs Stadler Ag | Tapping screw |
US5129901A (en) * | 1991-06-10 | 1992-07-14 | Decoste Vern X | Cannulated orthopedic screw |
DE4205059A1 (en) * | 1991-04-06 | 1992-10-08 | Yamahiro Kawachinagano Kk | Self-tapping screw with two=stage cutting edge - has end of shank formed as drill bit with stepped cutting edges |
US5520491A (en) * | 1994-05-11 | 1996-05-28 | Miyagawa Kinzoku Kogyo Co., Ltd. | Drill screw |
WO2000061958A1 (en) * | 1999-04-08 | 2000-10-19 | A-Z Ausrüstung Und Zubehör Gmbh & Co. Kg | Self-drilling and thread-forming connecting element |
US6142719A (en) * | 1998-03-30 | 2000-11-07 | Hilti Aktiengesellschaft | Self-drilling screw |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1083022B (en) * | 1977-07-21 | 1985-05-21 | Mustad O & Figlio Spa | SELF-PERFORATING AND SELF-THREADING SCREW |
US4836730A (en) * | 1985-01-17 | 1989-06-06 | Emhart Industries, Inc. | Fastener |
JPS62275542A (en) * | 1986-10-01 | 1987-11-30 | Shinjiyou Seisakusho:Kk | Drill part forming die for drilling screw |
DE9211354U1 (en) * | 1992-08-24 | 1994-01-05 | EJOT Eberhard Jaeger GmbH & Co KG, 57334 Bad Laasphe | Self-drilling and thread-forming screw |
-
1969
- 1969-12-23 DD DD14460369A patent/DD83671A1/en unknown
-
1970
- 1970-08-04 GB GB3762870A patent/GB1316157A/en not_active Expired
- 1970-12-07 DE DE19702060051 patent/DE2060051A1/en active Pending
- 1970-12-14 CS CS842570A patent/CS149944B2/cs unknown
- 1970-12-22 HU HUHA000146 patent/HU166499B/hu unknown
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4064784A (en) * | 1975-05-01 | 1977-12-27 | Adler Robert B | Drill tip and threaded fastener |
US4599024A (en) * | 1978-01-18 | 1986-07-08 | Kabushiki Kaisha Yamashina Seikosho | Entering end portion of drill screw |
US4407620A (en) * | 1979-12-29 | 1983-10-04 | Yugen Kaisha Shinjoseisakusho | Drill screw |
US4586862A (en) * | 1981-01-12 | 1986-05-06 | Katsuhisa Yamasaki | Drilling screw |
US4677703A (en) * | 1981-01-12 | 1987-07-07 | Topura Co., Ltd. | Dies for forming drilling screws |
DE3626627A1 (en) * | 1985-08-14 | 1987-02-19 | Usm Corp | FASTENERS |
US4787792A (en) * | 1985-08-14 | 1988-11-29 | Usm Corporation | Drill screw |
US4793756A (en) * | 1985-10-24 | 1988-12-27 | Sfs Stadler Ag | Tapping screw |
US4708557A (en) * | 1986-02-12 | 1987-11-24 | Fuji Tec Co., Ltd. | Drill screw |
DE4205059A1 (en) * | 1991-04-06 | 1992-10-08 | Yamahiro Kawachinagano Kk | Self-tapping screw with two=stage cutting edge - has end of shank formed as drill bit with stepped cutting edges |
US5129901A (en) * | 1991-06-10 | 1992-07-14 | Decoste Vern X | Cannulated orthopedic screw |
US5520491A (en) * | 1994-05-11 | 1996-05-28 | Miyagawa Kinzoku Kogyo Co., Ltd. | Drill screw |
US6142719A (en) * | 1998-03-30 | 2000-11-07 | Hilti Aktiengesellschaft | Self-drilling screw |
WO2000061958A1 (en) * | 1999-04-08 | 2000-10-19 | A-Z Ausrüstung Und Zubehör Gmbh & Co. Kg | Self-drilling and thread-forming connecting element |
Also Published As
Publication number | Publication date |
---|---|
DE2060051A1 (en) | 1971-07-01 |
CS149944B2 (en) | 1973-08-23 |
HU166499B (en) | 1975-03-28 |
DD83671A1 (en) | 1971-08-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |