GB1219723A - Screws and methods and apparatus for making them - Google Patents

Screws and methods and apparatus for making them

Info

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
Application number
GB2133569A
Inventor
George Louis Wieber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Publication of GB1219723A publication Critical patent/GB1219723A/en
Expired legal-status Critical Current

Links

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

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.
GB2133569A 1968-04-25 1969-04-25 Screws and methods and apparatus for making them Expired GB1219723A (en)

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) DE6916369U (en)
FR (1) FR2006927A1 (en)
GB (1) GB1219723A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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
DE1920693A1 (en) 1970-07-16
FR2006927A1 (en) 1970-01-02
DE6916369U (en) 1972-02-24

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