Surgical cutting instrument with near-perimeter interlocking...

A - Human Necessities – 61 – B

Patent

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Details

A61B 17/14 (2006.01) B27B 19/00 (2006.01)

Patent

CA 2727401

A blade coupling mechanism (116) for a hand-held surgical cutting instrument (102) includes a first coupling member (118) including a first blade-contacting surface (130) and a first outer perimeter sidewall (132) ad-jacent the first blade contacting surface. It also includes a second coupling member (120) including a second blade--contacting surface (160) facing the first blade-contacting surface of the first coupling member. The second coupling member includes- a second outer perimeter sidewall (164) adjacent the second blade contacting surface. The second blade-contacting surface and the second outer perimeter sidewall meet to define an outer edge (168). The second coupling member including a bore (156) through the sec-ond blade contacting surface. The bore and the second blade contacting surface meeting to define an inner edge (166). Blade- engaging protrusions project (172) from at least one of the first and second blade-contacting surfaces. The protrusions are spaced closer to the outer edge than the inner edge.

L'invention porte sur un mécanisme d'accouplement de lame (116) pour instrument chirurgical de coupe portatif (102) qui comprend un premier élément d'acouplement (118) comprenant une première surface de mise en contact de lame (130) et une première paroi latérale (132) de périmètre extérieur adjacente à la première surface de contact de lame. Le mécanisme comprend également un second élément d'accouplement (120) comprenant une seconde surface de contact de lame (160) faisant face à la première surface de contact de lame du premier élément d'accouplement. Le second élément d'accouplement comprend une seconde paroi latérale (164) de périmètre extérieur adjacente à la seconde surface de contact de lame. La seconde surface de contact de lame et la seconde paroi latérale de périmètre extérieur se rencontrent pour définir un bord extérieur (168). Le second élément d'accouplement comprend un orifice de passage (156) à travers la seconde surface de contact de lame. L'orifice de passage et la seconde surface de contact de lame se rencontrent pour définir un bord intérieur (166). Des protubérances venant en prise avec la lame font saillie (172) à partir de la première et/ou de la seconde surface de contact de lame. Les protubérances sont espacées plus près du bord extérieur que du bord intérieur.

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