Fastener system for fixing hardened plates

F - Mech Eng,Light,Heat,Weapons – 16 – B

Patent

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Details

F16B 35/06 (2006.01) B02C 17/22 (2006.01) B23K 31/10 (2006.01) B60R 13/01 (2006.01) B65D 90/04 (2006.01) B65G 11/16 (2006.01) F16B 5/02 (2006.01) F16B 29/00 (2006.01) F16B 33/06 (2006.01) F16B 37/00 (2006.01)

Patent

CA 2590198

A fastener element (150) comprises a frusto-conical portion (162) and a threaded portion (164). The smallest outer diameter of the frusto-conical portion is adjacent the threaded portion. The largest outer width of the threaded portion is smaller than the smallest outer diameter of the frusto- conical portion. The frusto-conical portion is hardened to a Brinell hardness of at least 300 HB. A fastener system (150) has an elongate shaft 172) and a head portion (162) having a generally annular shape, a hole (164), and means for engaging the inside of the hole with the shaft. The head portion engages with the shaft and is relatively harder than the shaft. A hardened plate (152) comprising a frusto-conical hole (160) therein for receiving a complementary fastener element (162) for fastening the hardened plate to a work piece. The plate has a Brinell hardness of at least 300 HB.

La présente invention décrit un élément de fixation (150) comprenant une partie tronconique (162) et une partie filetée (164). Le diamètre extérieur le plus petit de la partie tronconique est adjacent à la partie filetée. La largeur extérieure la plus importante de la partie filetée est plus petite que le diamètre extérieur le plus petit de la partie tronconique. La partie tronconique est durcie jusqu'à une dureté Brinell d~au moins 300 HB. Un système de fixation (150) comporte un arbre allongé 172) et une partie de tête (162) ayant une forme généralement annulaire, un trou (164) et des moyens pour mettre en prise l~intérieur du trou avec l~arbre. La partie de tête vient en prise avec l~arbre et est relativement plus dure que l~arbre. Une plaque durcie (152) comprend un trou tronconique (160) destiné à recevoir un élément de fixation complémentaire (162) pour fixer la plaque durcie à une pièce de fabrication. La plaque a une dureté Brinell d~au moins 300 HB.

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