F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
F16B 25/00 (2006.01)
Patent
CA 2314936
The invention relates to a self-tapping screw which comprises an at least partially non-circular envelope curve of the thread, and has a penetrating section (B, C, D) and a retaining section (A), whereby the penetrating section contains a plurality of successive graduations (B1, B2) of the thread. Said graduations of the thread each comprise at least one thread and, along the graduation of the thread, comprise an essentially equal aligned envelope curve which runs in an either cylindrical manner or an elliptical manner. The graduations of the thread merge with an elliptical envelope curve (elliptical graduation of the thread) in such a way that the major axes of the successive elliptical graduations of the thread are offset in relation to one another, thus forming a stepped graduation.
L'invention concerne une vis auto-taraudeuse présentant une courbe enveloppante au moins partiellement ovalisée du filet, un segment de pénétration (B, C, D) et un segment de maintien (A). Le segment de pénétration contient plusieurs zones de filet successives (B1, B2), présentant chacune au moins un pas de filet et, le long de la zone de filet, pratiquement une courbe enveloppante identique alignée, à allure cylindrique ou même elliptique. Les zones de filet à courbe enveloppante elliptique (zone de filet elliptique) sont regroupées de telle manière que les grands axes des zones de filet elliptiques successives sont décalés angulairement l'un par rapport à l'autre, formant ainsi un groupe de zones.
Koenig Gottfried
Menz Werner
Ejot Verbindungstechnik Gmbh & Co. Kg
Kirby Eades Gale Baker
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