Abstract: An upper end cap including an inner filter member that surrounds a middle space portion, an outer filter member that surrounds the inner filter member, and an introduction port for introducing compressed air into the middle space portion, and a lower end cap that closes a lower end portion of the middle space portion, an outer periphery of a lower end portion of the inner filter member being surrounded by an inner wall, an outer periphery of a lower end portion of the outer filter member being surrounded by an outer wall, an upper end surface of the outer wall being positioned higher than an upper end surface of the inner wall, a liquid discharge passage being formed between the outer wall and the inner wall, the liquid discharge passage being in communication with a liquid discharge hole that open to an underside of the lower end cap.

Abstract: A pilot check valve includes: a fluid channel body; a moveable body that moves in an axial direction under effects of pilot pressure; a packing including a lip portion that is displaceable, integrally with the moveable body, between a valve close position and a valve open position; and a detector to detect position of the moveable body. The packing, in the valve close position, allows flow of an operating liquid from a first port side of the fluid channel body to a second port side and prevents the flow of the operating liquid from the second port side to the first port side, and in the valve open position, connects the first port and the second port.

Abstract: A fluid pressure cylinder driving device includes a switch valve, a high pressure air supply source, an exhaust port and a check valve. When the switch valve is at a first position, a head side cylinder chamber communicates with the high pressure air supply source, and a rod side cylinder chamber communicates with the exhaust port. When the switch valve is at a second position, the head side cylinder chamber communicates with the rod side cylinder chamber via the check valve, and the head side cylinder chamber communicates with the exhaust port.

Abstract: A valve operating member includes a valve support portion, which supports a valve disk while allowing the valve disk to move relative to the valve operating member in a direction of an axis. An elastic member is disposed inside a valve chest. The elastic member constantly urges the valve disk toward the valve seat in the direction of the axis to cause the valve disk to be seated on the valve seat with an urging force. The valve support portion includes a valve engagement portion, which is engaged with an engaged portion of the valve disk seated on the valve seat, and separates the valve disk apart from the valve seat. When the valve disk is seated on the valve seat, the valve engagement portion is not in contact with the valve disk in the direction of the axis.

Abstract: A pump system is equipped with a body, a displacement body, a bellows member, an indirect medium, and a diaphragm. The pump system is further equipped with a pressure sensor configured to detect a pressure of the indirect medium in a charge chamber, the charge chamber being formed to include an interior space of the bellows member in the interior of the body. A controller of the pump system determines an abnormality of the diaphragm based on detection values detected by the pressure sensor.

Abstract: The cross-sectional shape of a valve hole is an elongated shape having a long axis and a short axis, and has left and right hole side walls that are parallel to each other, a first hole end wall that connects one ends of the left and right hole side walls, and a second hole end wall that connects the other ends of the left and right hole side walls, and the cross-sectional shape of land portions of a spool is an elongated shape having a long axis and a short axis, and has left and right land side walls that are parallel to each other, a first land end wall that connects one ends of the left and right land side walls, and a second land end wall that connects the other ends of the left and right land side walls.

Abstract: A chuck apparatus includes a first rotating shaft provided with a first gripping member, a second rotating shaft provided with a second gripping member, and a power transmission mechanism configured to convert reciprocating movement of a piston unit into rotational movement of the first rotating shaft and the second rotating shaft. The first rotating shaft and the second rotating shaft are arranged side by side in a direction of displacement of the piston unit.

Abstract: A cooling liquid circulation apparatus comprising a liquid for a circuit which circularly supplies a liquid for adjusting temperature of a load, a refrigeration circuit which adjusts the temperature of the liquid by thermal exchange with a coolant to a set temperature, and a control unit which controls the overall apparatus. A temperature adjustment method by connecting in series and circularly of a circuit to circularly supply the liquid for adjusting temperature to a load and a refrigeration circuit for adjusting the temperature of the liquid with a coolant by heat exchange.