F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
F16B 33/02 (2006.01) F16B 25/00 (2006.01) F16B 25/02 (2006.01) F16B 25/10 (2006.01)
Patent
CA 2228673
A screw threaded fastener (103) has an elongate shank (122) with a drilling tip (104) at one end and a head (123) at the other end. A screw thread extends along at least a part of the length of the shank. The trailing flank (116) of the thread subtends an angle relative to the axis of the fastener which approaches 90° and is greater than the angle subtended by the leading flank (115). The screw is for use in fixing sheets of material to thin metal battens (5) and the angle between the trailing flank (116) and the adjacent thin metal section (18) of the batten, being reduced in comparison to a conventional thread form, lessens the distorting effect of the thread on the batten under relatively high pull-out loads.
Cette invention concerne une fixation filetée (103) dont la tige (122) se termine par une pointe (104) à un bout et par une tête de vissage (123) à l'autre bout. La tige (122) est filetée sur au moins une partie de sa longueur. Le flanc arrière (116) du filet sous-tend un angle de près de 90 degrés par rapport à l'axe de la fixation, angle supérieur à celui sous-tendu par le flanc d'attaque (115). La vis objet de l'invention est destinée à l'assemblage de feuilles sur liteaux métalliques minces (5). L'angle entre le flanc arrière (116) et la section adjacente mince (18) du liteau étant inférieur à celle obtenue avec des filetages traditionnels, la déformation du liteau en conditions d'efforts d'arrachement relativement élevés est réduite.
Doneddu Mark
Roberts David James Alexander
Finlayson & Singlehurst
W.a. Deutsher Pty Ltd
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