Integral reamer apparatus

Details Integral reamer apparatus Integral reamer apparatus

A - Human Necessities

61

B

A61B 17/56 (2006.01) A61B 17/16 (2006.01)

Patent

CA 2173935

A medullary rotational reaming apparatus includes an elongated, flexible, hollow, tubular shaft formed of a nickel-titanium alloy and having coupling portions at the opposite ends thereof. Each of a cutter head and a rotational drive coupling element has a hollow tubular coupling shank, each shank having a coupling inner surface which is quadrilobular in transverse cross section and is dimensioned to prevent free reception of a coupling portion of the shaft therein. The coupling portions of the shaft are axially press-fitted in permanent engagement, respectively, within the shanks of the cutter head and the drive coupling element, with said coupling portions being permanently deformed to the transverse cross section of the coupling inner surface of the shanks, thereby to fix the cutter head and the coupling element to the shaft solely by the press-fitted engagement of the coupling portions in the shanks.

Un appareil d'alésage rotatif médullaire comprend un arbre tubulaire creux, flexible et allongé, formé d'un alliage de nickel-titane et ayant des parties d'accouplement à ses extrémités opposées. Une tête coupante et un accouplement de transmission rotatif ont chacun une tige d'accouplement tubulaire creuse, chaque tige ayant une surface interne d'accouplement qui est de section quadrilobée et dimensionnée de manière à prévenir la libre réception d'une partie d'accouplement de l'arbre. Les parties d'accouplement de l'arbre sont axialement insérées à pression et en prise permanente, respectivement, dans les tiges de la tête coupante et de l'accouplement de transmission, lesdites parties d'accouplement étant déformées en permanence suivant le profil de la surface interne d'accouplement des tiges, de manière à fixer la tête coupante et l'accouplement à l'arbre par la seule insertion à pression des parties d'accouplement dans les tiges.

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