Patent ID: 6050153
Filing Date: 2000-04-18
Classification: B25J,C12M,G02B,Y10T

Abstract:
A hydraulically-operated micromanipulator apparatus, which comprises:a micromanipulator fine control unit including first and second operating-side pistons operatively related to respective first and second operating-side hydraulic cylinders and finely movable relative thereto in response to movement of a fine control device, either the operating-side pistons or the operating-side hydraulic cylinders being stationarily retained, while the non-retained operating-side pistons or cylinders are finely operable by the fine control device; anda hydraulically-operated micromanipulator unit including first and second actuating-side pistons operatively related to respective first and second actuating-side hydraulic cylinders and finely movable relative thereto, the actuating-side hydraulic cylinders being connected to respective operating-side hydraulic cylinders through respective hoses, either the actuating-side pistons or the actuating-side hydraulic cylinders being stationarily retained, the non-retained actuating-side pistons or cylinders being attached to a fine displacement member, wherebythe interconnected operating-side and actuating-side cylinders compensate for pressure change of hydraulic fluid between said operating-side and actuating-side hydraulic cylinders when ambient temperature changes.