Abstract: An electromagnetic valve as a fluid device is provided with a valve seat and a valve body midway of a flow path where a liquid flows, and closes the valve with the valve body pressed onto the valve seat and opens the valve by causing a gap between the valve seat and the valve body. The electromagnetic valve includes, as electrodes for measuring a degree of electrical conductivity between a liquid on an upstream side and a liquid on a downstream side of the valve seat and the valve body in the flow path, a first electrode electrically conductive to the liquid on the upstream side and a second electrode electrically conductive to the liquid on the downstream side. By using the first and second electrodes, detection of liquid leakage can be easily performed.

Abstract: A culture apparatus which supplies a culture medium, which is a cell culture solution, to culture cells includes a culture cartridge including a culture space where the cells can be seeded, a supply path for supplying the culture medium to the culture space, and a collection path for collecting the culture medium passing through the culture space. The culture cartridge is configured to be attachable and detachable, and includes connecting parts and for connecting, when attached, the culture space to the supply path and the collection path.

Abstract: A valve device includes a liquid contact part having a valve part provided in a flow path to distribute a liquid, and a valve drive part that is removably joined to the liquid contact part and drives the valve part to open/close. In the valve part of the liquid contact part, a diaphragm valve is provided, and at a substantially central portion of the diaphragm valve, a valve stem is provided to project. The valve stem is inserted slidably in a stem hole opened and provided in a joint surface between the liquid contact part and the valve drive part. On joint surfaces between the liquid contact part and the valve drive part, fitting joint parts by which the liquid contact part and the valve drive part are positioned and removably fitted and joined to each other are provided.

Abstract: An electromagnetic valve as a fluid device is provided with a valve seat and a valve body midway of a flow path where a liquid flows, and closes the valve with the valve body pressed onto the valve seat and opens the valve by causing a gap between the valve seat and the valve body. The electromagnetic valve includes, as electrodes for measuring a degree of electrical conductivity between a liquid on an upstream side and a liquid on a downstream side of the valve seat and the valve body in the flow path, a first electrode electrically conductive to the liquid on the upstream side and a second electrode electrically conductive to the liquid on the downstream side. By using the first and second electrodes, detection of liquid leakage can be easily performed.

Abstract: A joint system includes flow paths coupled to a fluid device which handles a fluid, first and second electrodes separately provided to the flow paths to electrically make contact with the fluid in the flow paths, and a detection circuit which detects whether the fluid passing through the fluid device is present or absent. The detection circuit measures a degree of electrical conductivity between the flow paths by using the first and second electrodes and detects whether the fluid passing through the fluid device is present or absent in accordance with the degree of electrical conductivity between the flow paths.

Abstract: A perfusion culture apparatus, capable of culturing cells having a multilayer structure, includes (i) a film, which is a sheet-shaped carrier on which cells are seeded in a state in which a liquid medium is allowed to pass through the sheet-shaped carrier; (ii) a vessel, which holds the film in a state in which the liquid medium is in contact with front and rear surfaces of the film; and (iii) a gas chamber, which applies pressure from outside to the liquid medium on the side in contact with either of the front and rear surfaces of the film to form a pressure difference between the liquid medium on the side in contact with the one surface and the liquid medium on the side in contact with the other surface, the liquid medium passing through the film in accordance with the pressure difference.

Abstract: A shape-memory alloy valve device includes a shape-memory alloy wire configured to make a valve member perform an opening/closing operation and a valve actuation control unit configured to control an opening/closing operation of the valve member. The valve actuation control unit controls energization of the shape-memory alloy wire in accordance with an input valve open signal or an input valve close signal so as to make the shape-memory alloy wire contract by raising a temperature of the shape-memory alloy wire beyond an operating environmental temperature, thereby controlling valve opening/closing. A preheating unit heats the shape-memory alloy wire to a preset preheat set temperature by energizing the shape-memory alloy wire from a power circuit when the temperature of the shape-memory alloy wire which is measured by a temperature measurement unit is lower than the preheat set temperature.

Abstract: For the present small solenoid valve, a stem is coupled to a solenoid plunger, and a valve body is attached to a distal end of the stem. A circular-ring shaped valve seat on which the valve body is seated is provided in a valve chamber of a valve casing, and a seal ring is externally fitted on the stem between the valve chamber and the solenoid plunger with an outer peripheral portion of the seal ring made to contact with an inner surface of the valve casing. The valve casing and the seal ring are made of a rubber-like polymer elastic body, a first port is connected to communicate with the valve chamber, and a second port is connected to communicate with an inner side of the valve seat. At actuation of the solenoid, when the stem moves in an axial direction, the seal ring follows the movement by only elastic deformation without sliding.

Abstract: A perfusion culture apparatus, capable of culturing cells having a multilayer structure, includes a film, which is a sheet-shaped carrier on which cells are seeded in a state in which a liquid medium is allowed to pass through the sheet-shaped carrier, and a vessel, which holds the film in a state in which the liquid medium is in contact with front and rear surfaces of the film, and a gas chamber, which applies pressure from outside to the liquid medium on the side in contact with either of the front and/or rear surfaces of the film to form a pressure difference between the liquid medium on the side in contact with the one surface and the liquid medium on the side in contact with the other surface. The liquid medium passes through the film in accordance with the pressure difference.

Abstract: The slide type valve of the present invention has a structure in which a movable flowpath forming member is pressed toward a slidable sealing member by use of a spring member and in which the load of the slidable sealing member received from the movable flowpath forming member becomes equal to a constant spring load determined by a spring force of the spring member. Additionally, an attachment member holding the movable flowpath forming member that is movable to the fixed flowpath forming member has a housing hole whose shape substantially coinciding with the shape of the movable flowpath forming member. The movable flowpath forming member is housed in the housing hole so as to be slidable in a direction perpendicular to the first end surface of the fixed flowpath forming member, and, accordingly, the load distribution is uniformed both in a first seal sliding surface and in a second seal sliding surface of the slidable sealing member.

Abstract: The slide type valve of the present invention has a structure in which a movable flowpath forming member is pressed toward a slidable sealing member by use of a spring member and in which the load of the slidable sealing member received from the movable flowpath forming member becomes equal to a constant spring load determined by a spring force of the spring member. Additionally, an attachment member holding the movable flowpath forming member that is movable to the fixed flowpath forming member has a housing hole whose shape substantially coinciding with the shape of the movable flowpath forming member. The movable flowpath forming member is housed in the housing hole so as to be slidable in a direction perpendicular to the first end surface of the fixed flowpath forming member, and, accordingly, the load distribution is uniformed both in a first seal sliding surface and in a second seal sliding surface of the slidable sealing member.

Abstract: Disclosed is a durable fluid manifold easy to handle and whose members for forming channels are thin and circuit volume is relatively small. The fluid manifold includes an admission-side base with fluid admission ports and an exhaust-side base with fluid exhaust ports. The fluid manifold additionally includes a flexible member made of a plurality of resin films bonded together by application of heat and pressure without using an adhesive. The flexible member is bonded on the upper surface of the bases and to form the fluid manifold, in which pumps and valves are mounted on the admission-side base via the flexible member. Formed within the flexible member are fluid channels placed in communication with the admission ports and the exhaust ports and coupled to the pumps and the valves.

Abstract: A compact solenoid including a coil and a frame located outside the coil for constituting a magnetic circuit. The frame includes four bars extending in parallel to the axial direction of the coil and located proximate to the outer circumferential face of the coil. Each of the bars has a generally triangular cross section. The four bars are disposed to have a mutual positional relationship corresponding to vertexes of a square.

Abstract: The compact solenoid of the present invention conduces to further miniaturization of a compact solenoid. The compact solenoid includes a coil and a frame located outside the coil for constituting a magnetic circuit. The frame includes four bars extending in parallel to the axial direction of the coil and located proximate to the outer circumferential face of the coil. Each of the bars has a generally triangular cross section. The four bars are disposed to have a mutual positional relationship corresponding to vertexes of a square.

Abstract: The valve structure of the present invention can completely eliminate the dead volume of a valve in closed position, thereby enhancing the precision and reliability of measurement. A valve chamber (3) is divided into an upper portion and a lower portion by a diaphragm (6). The whole circumference of the diaphragm (6) is fixed on the same level as the bottom of the valve chamber (3). A fluid inlet port (4a) is formed on the substantial center of the bottom face of the valve chamber (3). A stepped hole (7) is arranged concentrically with the fluid inlet port (4a) open to the valve chamber (3). A valve seat (8) composed of perfluoro-elastomer has a stepped element (8a) which corresponds to and is fitted in the stepped hole (7). A valve disc (10) projected through the bottom face of the diaphragm (6) is pressed against a ring projection (8b) of the valve seat (8) protruded into the valve chamber (3).