Nambu Co., Ltd

Ryuzo Yagishita

Kazuki Matsumoto

Kazushi Nomura

A cylinder chamberat the front of a direct-acting type actuator sectionis connected to a cylinder chamberat the front of an oscillating type actuator sectionthrough a sequence valve with check valve. Further, a cylinder chamberin the rear of the direct-acting type actuator sectionis connected to a cylinder chamberin the rear of the oscillating type actuatorthrough a stop valve. Portsandare provided for connecting passages between the cylinder chamberand the sequence valve with check valveand between the cylinder chamberand the stop valve, respectively, for distribution control of a working fluid. According to the setting conditions of the respective valvesand, the piston rodcan perform an ordinary reciprocating motion and a motion that combines rotation and advancement.

Composite operation type actuator

The inside of a cylinder is divided into front and rear cylinder chambers, a primary-side piston and a secondary-side piston, each formed by an annular disc part and an annular tube part are fitted into each cylinder chamber, with the annular tube parts of each loosely fitted together, and the secondary-side piston surrounding an operating piston rod so as to hold the operating piston and being fit into the operating piston. The first front cylinder chamber and the second rear cylinder chamber defined by the primary- and secondary-side pistons are connected by a communicating passageway with a relief valve inserted therein, this relief valve being switched to the open condition by either a prescribed pressure or a valve opening/closing bar that is provided upright on the primary-side piston.

Growing community of inventors

Tokyo, Japan

Ryuzo Yagishita