Importance

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Abstract

In a cylinder control device comprising a control valve that controls a flow of working fluid flowing between a cylinder and a pump, the control valve includes a spool provided in a main body portion, a sleeve that is provided in the main body portion opposite each of two end portions of the spool, and includes a communicating port that communicates with a valve chamber, a communicating passage that communicates with a cylinder chamber, and a throttle passage that communicates with the cylinder chamber, a valve body provided in the sleeve to control a communication state between the communicating port and the communicating passage and throttle passage in accordance with a sliding position thereof, and a biasing member that biases the valve body in a valve closing direction.

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First Claim