Patent ID: 7146900

Claim:
A composite operation type actuator comprising a direct-acting type actuator section and an oscillating type actuator section of a cylinder structure, said oscillating type actuator section being coupled to a head cover of said direct-acting type actuator section so that a piston rod of said direct-acting type actuator section is disposed on a same axis as an oscillating shaft of said oscillating type actuator section, said oscillating shaft passes through said head cover and being fitted inside a hollow opening formed from a rear surface side of said piston rod of said direct-acting type actuator section in an axial direction of said composite operation type actuator, said oscillating shaft and said hollow opening being combined to form a constrained pair of a sliding pair alone in the axial direction, thereby enabling reciprocating and oscillating motions of said piston rod of said direct-acting type actuator section, wherein a cylinder chamber on a side of a rod cover of said direct-acting type actuator section is connected to one of two cylinder chambers of said oscillating type actuator section, hereinafter referred to as a “first cylinder chamber”, through a sequence valve with check valve; a cylinder chamber on a side of said head cover of said direct-acting type actuator section is connected to the other of said cylinder chambers of said oscillating type actuator section, hereinafter referred to as a “second cylinder chamber”, through a stop valve or a throttle valve; distribution ports are provided for a connecting passage between said first cylinder chamber of said oscillating type actuator section and said sequence valve with check valve and a connecting passage between said cylinder chamber on the side of said head cover of said direct-acting type actuator section and said stop valve or said throttle value, respectively; and each of the motions of said piston rod of said direct-acting type actuator section can be adjusted and set according to a setting condition of a pilot pressure of said sequence valve with check valve and an open-state or closed-state setting condition of said stop valve or said throttle valve.