Patent ID: 8231611
Filing Date: 2012-07-31
Classification: A61B,Y10T

Abstract:
1. A shaft rotating device for rotating a shaft of a medical instrument about a longitudinal axis of said shaft relative to a handle of said medical instrument, comprising an operating element for rotating said shaft, which is arranged at a proximal portion of said shaft and which is in driving connection with said shaft such that said shaft is rotatable relative to said handle against frictional forces, a frictional element having a first surface, wherein said first surface of said frictional element is in frictional contact with a second surface of a counterpart, rotationally fixed to the handle, for keeping said shaft and said handle rotationally stationary with respect to each other and movable against said frictional forces, said operating element and said frictional element being in operational connection with respect to one another such that a torque applied to said operating element decreases said frictional forces, and said shaft and said frictional element being in operational connection with one another such that a torque applied to a distal portion of said shaft increases said frictional forces.