Patent ID: 8882750

Claim:
A tool that is adapted to be detachably mechanically coupled with a distal end of a shaft for a micro-invasive surgical instrument, having: an articulated device to which a jaw member or other active device is attached; a connecting component that is mechanically connected to rotate with the articulated device, and which comprises a coupling device for detachable mechanical coupling with a distal end of a shaft; a transmission rod to transmit at least either a force or a torque from a proximal end of a shaft that is detachably mechanically coupled with the tool to the jaw member or to the other active device, and a locking device that is mechanically coupled with the transmission rod in such a way that the locking device is rotatable in relation to the transmission rod but is not axially slidable in relation to the transmission rod, such that the locking device is mechanically mounted in the connecting component in such a way that the locking device is slidable axially in relation to the connecting component but is not rotatable in relation to the connecting component, wherein the locking device includes a ring-shaped portion that engages in a surrounding groove on the transmission rod.