ORTHOPEDIC DRIVE ASSEMBLY

摘要

A cordless rechargeable replaceable battery assembly powered drive assembly for driving orthopedic surgical instruments in which the battery has silver and zinc oxide electrodes in sodium hydroxide electrolyte to provide low voltage high current power. The switch is encased in the battery assembly, the battery cells are vented through a microporous polymeric curtain to restrict expulsion of electrolyte, a two speed transmission is provided to change drive speeds, and a brush block on the motor has contacts adapted to be connected in different combinations to change the motor rotation direction.