F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
F16B 25/00 (2006.01) F16B 33/02 (2006.01)
Patent
CA 2478989
A fixing device (10) comprises a bright zinc-plated steel shank (1) formed by cold forming with a head (2), the shank (1) having formed thereon by thread- rolling a helical thread configuration (6). This thread configuration comprises a pair of spaced apart helical ridges (7, 8) with a helical groove (9) defined therebetween. The height of the ridges is reduced at both ends of the shank (1), with their height gradually increasing over one convolution from the end (3) opposite the head (2), and decreasing over half a convolution to the end (13) nearest the head (2).
L'invention concerne un dispositif de fixation (10) comportant une tige d'acier polie (1) revêtue de zinc, fabriquée par formage à froid avec une tête (2). A sa surface, ladite tige (1) comporte un filet hélicoïdal (6) formé par filetage par roulage. Ledit filet comporte deux arêtes hélicoïdales espacées (7, 8) renfermant une rainure hélicoïdale (9). La hauteur des arêtes est réduite sur les deux extrémités de la tige (1), augmente graduellement sur une convolution à partir de l'extrémité (2) opposée à la tête (2), et diminue sur la moitié d'une convolution en direction de l'extrémité (13) la plus proche de la tête (2).
Bickford Charles
Deeth Williams Wall Llp
LandOfFree
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