Patent ID: 8398674

Claim:
A medical instrument comprising: a hollow shank ( 2 ); and an instrument section ( 4 ) having an instrument part ( 24 ) mounted inside the instrument section ( 4 ), the instrument part ( 24 ) being linearly movable with respect to the instrument section ( 4 ) along an axial direction of the instrument section ( 4 ), the instrument section, proximate a distal end of the hollow shank ( 2 ), being arranged in a pivotable manner to the hollow shank ( 2 ), wherein the instrument part ( 24 ) is coupled in movement to a first actuator ( 26 ) which is axially movably guided in the hollow shank ( 2 ) via a forcibly guided multi-joint arm ( 28 ), wherein the multi-joint arm ( 28 ) comprises at least three arm parts ( 30 , 32 , 34 , 36 , 38 ) connected in series to one another in an articulated manner, wherein at least a second arm part ( 32 ), arranged between first and third arm parts ( 30 , 34 ), is pivotable about a first axis ( 40 ) arranged on the hollow shank ( 2 ), the first axis ( 40 ) being spaced from a straight connection line of articulation points of the first and third arm parts ( 30 , 34 ) to the second arm part ( 32 ).