JPS6115034B

• Main Authors: MINATO YOSHIO, TAKAGUCHI NAOTAKE
• Format: Patent
• Language: English
• Published: 22.04.1986
• Subjects: BLASTING; CAPSTANS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; ELEVATORS; ESCALATORS OR MOVING WALKWAYS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; HAULING; HEATING; HOISTING; HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDEDFOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCEDIRECTLY TO THE SURFACE OF A LOAD; HOISTS; HYDRAULICS OR PNEUMATICS IN GENERAL; LIFTING; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; TACKLES, e.g. PULLEY BLOCKS; TRANSPORTING; WEAPONS; WINCHES

PURPOSE:To provide a method of locking hydraulic elevator at its stop position, in which hydraulic circuits connected respectively to loaded-side oil chamber and unloaded-side oil chamber, formed in a hydraulic cylinder working to lift and lower the cage, are both blocked and locked while keeping pressure in the unloaded-side oil chamber, whereby shifting of the cage at the stop position due to load change can be minimized.