セルフタッピングネジ

Japanese Patent JP7414740

B2

A self-tapping screw (10, 30) comprising a drive (12) and a shank (14) bearing a thread comprising a main thread (16, 32), wherein the main thread (16, 32) has a maximum main thread external diameter (DAF) and a cutting area (F) and a supporting area (T) following in the direction of the drive (12), wherein the shank (14) has a threaded end (18) at an end opposite the drive (12), with the screw end (18) having a diameter (DE) of at least 20% of the maximum main thread external diameter (DAF), The shank further has, in the region of the screw end (18), a tap flute (20), wherein the tap flute (20) comprises at least two tapping thread turns (20a, 20b, 20c) which attain, in their external diameter (DAA), no more than 90% of the maximum main thread external diameter (DAF) and form a tap region in which the tapping thread turns (20a, 20b, 20c) have the same diameter development, and in addition in that the diameter of the main thread (16, 32) in the tap flute region (AB) is less than or equal to the diameter (DAA) of the tapping thread turns (20a, 20b, 20c).

JP4520771	Tapping screw to prevent loosening
JP2007100741	TAPPING SCREW
WO/2017/159896	TAPPING SCREW CAPABLE OF MINIMIZING MATERIAL STRAIN RATE OF OBJECT TO BE COUPLED

Michael Aschenbach
Jurgen Baer
Ralph Birkelbach
Volker Dickmann
Frank Dratzschmidt
Jean Hackler
lene gerbert
Ralph Jay Helmig
Iril Selimi
Stefan Weitzel

JP2020570106A

January 16, 2024

June 21, 2019

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Ayacht Gem Beherund Coker Game

F16B25/04

JP2001107932A
JP10103321A
JP2007100741A
JP2007285336A
JP2004509292A

US3703843

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