Oil passage change-over valve

• Main Authors: ICHIKAWA TOSHIKI, SAKATA TOKIO, ARAI YASUHIKO
• Format: Patent
• Language: English
• Published: 05.07.2016
• Subjects: ACTUATING-FLOATS; BLASTING; COCKS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; DEVICES FOR VENTING OR AERATING; DREDGING; ENGINEERING ELEMENTS AND UNITS; FIXED CONSTRUCTIONS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; FOUNDATIONS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HYDRAULIC ENGINEERING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; SOIL SHIFTING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; TAPS; THERMAL INSULATION IN GENERAL; VALVES; WEAPONS

An oil passage change-over valve allows an alternate communication from a first opening portion in one side a second and a third opening portion provided in another side to be changed over. A first opening portion is formed in one side of a valve body and the second and third opening portions are formed in another side of the valve body; a valve element within a valve hole of the valve body; and a communicating oil passage is formed in the valve element for alternately communicating the three opening portions. Inside the valve body, there are formed a first oil passage for connecting the valve hole with the first opening portion, a second oil passage for connecting the valve hole with the second opening portion, and a third oil passage for connecting the valve hole with the third opening portion deviated by 120 degrees from the first oil passage, respectively.