Patent ID: 6830174
Filing Date: 2004-12-14
Classification: A61B

Abstract:
A hydraulically actuated medical instrument, comprising:a handle portion; an end effector carried by the handle portion; the end effector including first and second hydraulic actuators, responsive to changes in hydraulic actuation pressure; a first hydraulic fluid flow path and a second hydraulic fluid flow path communicating between the handle portion and the first and second hydraulic actuators, respectively; and, the handle portion including a hydraulic cylinder block including first and second cylinders communicating, respectively, with the first and second flow paths, and first and second pistons slidably movable with respect to the first and second cylinders, respectively; first and second members movably mounted and engageable, respectively, with the first and second pistons for moving the pistons relative to the cylinders to chance the pressure of hydraulic fluid in the flow paths the first piston comprises a plurality of gear teeth, and the first engageable member includes a plurality of gear teeth engageable with the gear teeth of the first piston.