Gripper for surgical purposes

Claim 1

A gripper for a surgical attachment, comprising two rigid double levers directly coupled with said attachment and pivotable about a pit axis with respect to each other, having a pair of first and second opposed shorter arms and a pair of first and second opposed longer arms extending from said pivot axis, said arms being pivotable in a pivot plane through an angle of less than 30 degrees in a direction towards an open position and a direction towards a closed position of said double levers, said first longer arm having a rear face thereon facing in the direction away from said second longer arm, a spring device between said longer arms which is arranged to pretension said arms in the opening direction, a single first stop, separate from said attachment, for limiting the movement of said double levers in said opening direction, a second stop, separate from said attachment for stopping movement of said double levers at said closed position, a spur on said rear face on said first longer arm facing in the direction away from said second longer arm, said spur extending in said pivot plane, said first longer arm having a portion between said spur and said pivot axis having a through-hole which lies parallel to said pivot plane in a mid-region between said spur and said pivot axis and opens to said rear face, said second stop comprising a pin fastened on said second longer arm, which has a cap area at one end, extending in said pivot plane and arranged to pass through said through-hole, said pin having a length such that said cap area protrudes from said rear face of said first longer arm portion when said double levers are pivoted into said closed position, and a link plate resting on said rear face and fastened movably in a longitudinal direction on said first longer arm portion, said link plate being located above said through-hole and having a thumb-actuable projection thereon and extending to the side thereof, said link plate having a recess arranged and adapted to interlock with said cap area of said pin against the force of said spring device in said closed position.