HYDRAULIC VALVE AND HYDRAULIC CIRCUIT

Abstract: a hydraulic valve includes: a valve main body; and a spool. further, the spool is provided with a main passage portion, a first passage portion communicable with a first port, and a second passage portion communicable with a second port, an opening area of the first passage portion with respect to the first port is changed and flow rate control of oil from the first port to the second port through the main passage portion is performed, and the main passage portion of the spool has a first region, a second region, and a third region that connects the first region and the second region, an inner diameter of the first region being formed larger than that of the second region, and the third region being formed in a tapered shape in which an inner diameter gradually decreases toward the second region.

Inventor(s): Masatoshi Ikeda, Wataru Sumino, Takashi Akamatsu

CPC Classification: F15B13/0401 (SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR)

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