Patent ID: 9138240
Filing Date: 2015-09-22
Classification: A61B

Abstract:
1. Surgical instrument, comprising: a handling part, and a tool part, the tool part comprising at least one movably mounted tool, which is actuable by means of a force-transmitting and/or actuating mechanism that is operable from the handling part, and the force-transmitting and/or actuating mechanism comprising a fluid-operable drive unit, the drive unit comprising two double-acting fluid cylinders; wherein: with the drive unit in a first driving position the movably mounted tool is subjected to a first actuating force in an actuating direction and in at least a second driving position is subjected to at least a second actuating force in the actuating direction; and in an inoperative position of the instrument, in which no actuating force is exerted by the force-transmitting and/or actuating mechanism in the actuating direction on the tool, a retaining force is exerted on the tool by at least one of the two double-acting fluid cylinders in a retaining direction opposite to the actuating direction.