Patent ID: 9307963
Filing Date: 2016-04-12
CPC Classification: A61B

Claim Text:
1. Surgical instrument operated by pressurized gas, comprising: two tool elements, at least one of the two tool elements comprising a movable tool element, a pressurized gas connection for connecting the instrument to a source of pressurized gas, a working piston for moving the movable tool element and adapted to be acted upon by the pressurized gas, an actuating element for actuating the instrument, and a regulating device coupled to the actuating element and to the working piston for regulating a feed force of the working piston, wherein: the regulating device is configured such that for feed forces below a predetermined limit force it defines a first piston work area in which the working piston is movable in a distal direction solely owing to a first feed force that can be is applied with the actuating element, above the limit force the regulating device defines a second piston work area in which the working piston is movable in the distal direction by being acted upon by pressurized gas, and the movable tool element is movable over a maximum displacement path as a result of movement of the working piston in the first piston work area as a result of the first feed force, provided the predetermined limit force is not exceeded.