Plastic spanner with metal insert

B - Operations – Transporting – 25 – B

Patent

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81/51

B25B 13/08 (2006.01) B25B 13/00 (2006.01)

Patent

CA 2008956

PERFECTED PLASTIC TIGHTENING WRENCH WITH METAL INSERT - A plastic tightening wrench with handle and gripping heads, including a polygonal opening, in which an open metal insert (also polygonal) is countersunk. The walls of the insert form gripping jaws characterized as follows: The walls of the insert forming the jaws are parallel and extend slightly beyond the lateral faces of the openings of each gripping head. The metal insert is made of hard, flexible and resilient metal, having a hardness ranging from 45 to 50 HRC. The thickness of the insert ranges from 0.5 to 0.7 times the thickness of the gripping head.

CLE DE SERRAGE PERFECTIONNEE EN MATIERE PLASTIQUE AVEC INSERT METALLIQUE ABREGE DESCRIPTIF Clé de serrage en matière plastique constituée d'un manche et de têtes de serrage, comportant une ouverture polygonale, dans laquelle est noyé un insert métallique ouvert, également polygonal, et dont les parois forment mâchoires de serrage, caractérisée: en ce que les parois de l'insert formant mâchoire sont parallèles et dépassent légèrement des faces latérales des ouvertures de chaque tête de serrage; en ce que l'insert métallique est réalisé dans un métal dur, souple, et résiliant, ayant un coefficient de dureté compris entre 45 et 50 HRC; et en ce que, au niveau des mâchoires, l'épaisseur de l'insert est comprise entre 0,5 et 0,7 fois l'épaisseur de la tête de serrage.

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