Patent ID: 7976563

Claim:
A medical instrument with a shaft whose proximal end is provided with a handle consisting of two gripping members and whose distal end is provided with a tool consisting of two jaw members and in which, to open and close the tool, at least one jaw member can rotate with respect to the other jaw member around a point of rotation by means of a push-pull rod and in which the push-pull rod is connected on the proximal side with a rotatable gripping member of the handle, characterized in that both jaw members are configured so that they can rotate and are mounted on two axles that are mounted in the shaft perpendicularly to the longitudinal axis of the instrument, wherein arc-shaped openings are cleared for said two axles in the jaw members, and in that the rotation point is configured as a virtual rotation point that varies depending on the position of the jaw members with respect to one another, further characterized in that each jaw member is coupled with the axles by two pivot gears each and each pivot gear of every jaw member being positioned with one end on one of the axles and with the other end rotatably situated on a stud positioned immovably in the respective jaw member wherein said pivot gears are not directly connected to said push-pull rod.