GB1219723A - Screws and methods and apparatus for making them - Google Patents
Screws and methods and apparatus for making themInfo
- Publication number
- GB1219723A GB1219723A GB2133569A GB2133569A GB1219723A GB 1219723 A GB1219723 A GB 1219723A GB 2133569 A GB2133569 A GB 2133569A GB 2133569 A GB2133569 A GB 2133569A GB 1219723 A GB1219723 A GB 1219723A
- Authority
- GB
- United Kingdom
- Prior art keywords
- thread
- april
- degrees
- self
- substantially uniform
- 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
- 238000010079 rubber tapping Methods 0.000 abstract 2
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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/02—Making helical bodies or bodies having parts of helical shape external screw-threads ; Making dies for thread rolling
- B21H3/06—Making by means of profiled members other than rolls, e.g. reciprocating flat dies or jaws, moved longitudinally or curvilinearly with respect to each other
-
- 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
- F16B25/0047—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 ridge being characterised by its cross-section in the plane of the shaft axis
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Forging (AREA)
- Closures For Containers (AREA)
Abstract
1,219,723. Self-tapping screws. ILLINOIS TOOL WORKS Inc. 25 April, 1969 [25 April, 1968], No. 21335/69. Heading B3N. [Also in Division F2] A self-tapping screw comprises a screwed shank 14, Fig. 1, having a substantially uniform root diameter, a portion 20 of the thread having a substantially uniform crest diameter, and an included flank angle of 60 degrees, whereas the portion 22, has a larger crest diameter, and an included flank angle of 45 degrees. Portion 22 forms a complete thread form, to or within onehalf pitch of the head 12. The blank is formed with two diameters 29, 30 and the thread is rolled on to the shank by a pair of dies having grooves 42 for portion 20, and deeper grooves 44, for portion 22.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US72408368A | 1968-04-25 | 1968-04-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1219723A true GB1219723A (en) | 1971-01-20 |
Family
ID=24908913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2133569A Expired GB1219723A (en) | 1968-04-25 | 1969-04-25 | Screws and methods and apparatus for making them |
Country Status (3)
Country | Link |
---|---|
DE (2) | DE1920693A1 (en) |
FR (1) | FR2006927A1 (en) |
GB (1) | GB1219723A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005033528A1 (en) * | 2003-10-02 | 2005-04-14 | Abc Verbindungstechnik Gmbh & Co. Kg | Screw element, particularly for cross-pull and/or cross-pressure reinforcement of wooden components |
DE102011003252A1 (en) * | 2011-01-27 | 2012-08-02 | Hilti Aktiengesellschaft | rolling die |
TWI711769B (en) * | 2019-10-14 | 2020-12-01 | 曾啟育 | Self-tapping screws |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0004541A1 (en) * | 1978-02-17 | 1979-10-17 | B E L I P A R, Société Anonyme | Screw, especially thread forming screw and screw forming thread roll for this screw |
-
1969
- 1969-04-23 DE DE19691920693 patent/DE1920693A1/en active Pending
- 1969-04-23 DE DE19696916369 patent/DE6916369U/en not_active Expired
- 1969-04-24 FR FR6913053A patent/FR2006927A1/fr not_active Withdrawn
- 1969-04-25 GB GB2133569A patent/GB1219723A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005033528A1 (en) * | 2003-10-02 | 2005-04-14 | Abc Verbindungstechnik Gmbh & Co. Kg | Screw element, particularly for cross-pull and/or cross-pressure reinforcement of wooden components |
DE102011003252A1 (en) * | 2011-01-27 | 2012-08-02 | Hilti Aktiengesellschaft | rolling die |
TWI711769B (en) * | 2019-10-14 | 2020-12-01 | 曾啟育 | Self-tapping screws |
Also Published As
Publication number | Publication date |
---|---|
FR2006927A1 (en) | 1970-01-02 |
DE1920693A1 (en) | 1970-07-16 |
DE6916369U (en) | 1972-02-24 |
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