Abstract: A magnetic bearing contactlessly supporting a rotor by magnetic force includes: a bearing rotor member made of a magnetic material; and a bearing stator member arranged around bearing rotor member. The bearing stator member includes a core made of a magnetic material and a coil wound around the core. A longitudinal cross-sectional shape of the core has a first part extending in a first direction orthogonal to a direction opposed to the bearing rotor member and wound around with the coil, a pair of second parts extending from both end portions in the first direction of first part to the bearing rotor member side and subsequently extending in a direction approaching each other in the first direction, and a pair of third parts extending from respective distal end portions of the pair of second parts toward the bearing rotor member side. The bearing rotor member also includes a permanent magnet.

Abstract: A rotor, a magnetic bearing, and a drive unit that rotationally drives the rotor. The magnetic bearing includes a bearing stator and a ring-shaped bearing rotor member. The drive unit has a drive stator and a ring-shaped drive rotor member. The bearing stator has a plurality of bearing stator cores consisting of a magnetic material, disposed on an outer peripheral side of the bearing rotor member. The bearing stator core has a first portion extending in a first direction orthogonal to a direction facing the bearing rotor member, and a pair of second portions extending to a bearing rotor member side from both end portions in the first direction of the first portion. The drive stator is formed so as to pass through a position between an outer peripheral surface of the rotor and the first portion core and between the pair of second portions.

Abstract: A pump includes: a rotor; a magnetic bearing supporting the rotor by a magnetic force; a drive mechanism rotationally driving the rotor; a pump mechanism including an impeller attached to the rotor; and a control unit controlling the magnetic bearing which includes: a bearing rotor member in the rotor formed from a magnetic material; and a bearing stator member facing the bearing rotor member, the bearing stator member has: a core formed from a magnetic material; and a coil wound around the core, the drive mechanism includes: a driven member adjacent in a radial direction to the bearing rotor member; and a drive portion facing the driven member in the radial direction, and magnetically coupled to the driven member to drive the rotor, and the control unit corrects rotational position of the rotor based on a detection signal from a first sensor portion capable of detecting displacement of the rotor.

Abstract: A magnetic bearing contactlessly supporting a rotor by magnetic force includes: a bearing rotor member made of a magnetic material; and a bearing stator member arranged around bearing rotor member. The bearing stator member includes a core made of a magnetic material and a coil wound around the core. A longitudinal cross-sectional shape of the core has a first part extending in a first direction orthogonal to a direction opposed to the bearing rotor member and wound around with the coil, a pair of second parts extending from both end portions in the first direction of first part to the bearing rotor member side and subsequently extending in a direction approaching each other in the first direction, and a pair of third parts extending from respective distal end portions of the pair of second parts toward the bearing rotor member side. The bearing rotor member also includes a permanent magnet.

Abstract: A tubephragm pump includes a tubephragm that has a pump head portion that forms a pump chamber, a driving head that holds the tubephragm and expands and contracts the pump chamber by directly pressing and pulling the pump head portion in a direction intersecting with a transfer direction of a transfer fluid, a driving unit that drives the driving head back and forth in a driving direction to expand and contract the pump chamber, and a control unit that controls the driving unit. The tubephragm is in a flat shape with a cross-sectional shape intersecting with the transfer direction of the transfer fluid of the pump chamber having a length in a direction intersecting with the driving direction longer than a length in the driving direction. A pair of liquid contacting surfaces opposing in the driving direction of the pump chamber move while maintaining a parallel state.

Abstract: At least one rib 9c, 21c extending in a direction of connecting with a valve cartridge 30 is provided to the inner sides of each of a second connection port 9 of a pump head 5 and a third connection port 21 of a first connecting adapter 20A, and at least one slit 41 which extends in the connecting direction and into which the ribs 9c, 21c are loosely inserted is provided to the lower outer periphery of the valve cartridge 30.

Abstract: Plunger pump includes cylinder having inside cylinder chamber; plunger disposed in cylinder to be relatively movable forward and backward to cylinder chamber so outer plunger's circumferential face is in slide contact with cylinder's inner circumferential face, and having cut face on distal end's outer periphery; and suction and discharge ports provided to cylinder to communicate with cylinder chamber, plunger pump transferring fluid by reciprocating plunger in axial direction while rotating plunger relative to cylinder chamber to let suction and discharges ports alternately communicate with cylinder chamber, wherein cylinder includes cylinder main body and spacer section being disposed in cylinder main body's inner portion of proximal end side, and sliding against plunger's portion closer to proximal end side than portion of plunger advancing and retracting into cylinder chamber, and plunger pump further includes seal section provided on cylinder's proximal end side for sealing cylinder main body, plunger an

Abstract: The pump device includes: a pump body which transfers a transfer fluid; a drive unit which drives the pump body; an operating unit which sets an operation of the drive unit; and a joint mechanism which attaches the operating unit to the drive unit. The drive unit includes a casing. The operating unit includes a user-accessible operating surface. The joint mechanism is attached to a wall surface of the casing so as to be rotationally operable about a first axis perpendicular to the wall surface and supports the operating unit such that the operating surface crosses a second axis perpendicular to the first axis and follows along an outer surface of the casing.

Abstract: This valve seat is disposed below a valve ball, wherein the valve seat comprises an annular member in which a seating surface and a lower end surface of the valve ball are formed into a circular shape; a flow path is formed between the seating surface and the lower end surface, for communicating a transfer fluid including a gas and a liquid; and the flow path is formed in a predetermined shape in which a horizontal distance from the central axis which crosses the lower end surface at right angle to the inner circumferential surface of the flow path excluding the seating surface and the lower end surface is not constant over the entire circumference of the flow path.

Abstract: A magnetic pump includes a front casing including: a shaft supporting body that supports a leading end of a supporting shaft; and a plurality of supporting legs that extends toward an inner wall of a suction port from the shaft supporting body, and that supports the shaft supporting body in the suction port. In the magnetic pump, a leading end of the shaft supporting body is positioned further toward the inlet side of the suction port than a connecting section between the inner wall of the suction port and the supporting leg.

Abstract: A tubephragm pump includes a tubephragm that has a pump head portion that forms a pump chamber, a driving head that holds the tubephragm and expands and contracts the pump chamber by directly pressing and pulling the pump head portion in a direction intersecting with a transfer direction of a transfer fluid, a driving unit that drives the driving head back and forth in a driving direction to expand and contract the pump chamber, and a control unit that controls the driving unit. The tubephragm is in a flat shape with a cross-sectional shape intersecting with the transfer direction of the transfer fluid of the pump chamber having a length in a direction intersecting with the driving direction longer than a length in the driving direction. A pair of liquid contacting surfaces opposing in the driving direction of the pump chamber move while maintaining a parallel state.

Abstract: A plunger pump includes a cylinder section having a cylinder chamber and a spacer section sliding against a portion of the plunger closer to a proximal end side than a portion of a plunger advancing and retracting into the cylinder chamber. The cylinder section is made of a material having first hardness, and the spacer section being made of a resin material having second hardness softer than the first hardness. A length in an axial direction from a proximal end of a sliding portion of the spacer section sliding against the plunger to a distal end of the spacer section is larger than a maximum stroke length of reciprocation of the plunger.

Abstract: A volume pump transfers a transfer fluid by expanding and contracting a bellows, and includes: the bellows that is capable of expanding and contracting, and has a bottomed cylindrical shape forming a pump chamber on its inside; a suction valve provided on a suction side of the pump chamber to guide the transfer fluid into the pump chamber; and a discharge valve provided on a discharge side of the pump chamber to discharge the transfer fluid from the pump chamber. The suction valve and the discharge valve each include a valve seat and a valve body. The valve body is configured from a flexible material and has: a fixed section whose positional relationship with the valve seat is fixed; and a valve section that extends in a certain direction between a direction directed from the fixed section to the valve seat and a direction that the transfer fluid moves.

Abstract: A reciprocating pump includes: a pump head having an inner space; a diaphragm configured to partition the inner space of the pump head into a pump chamber into which a transfer fluid is to be introduced and a working chamber into which working air is to be introduced; a driving device including a reciprocating member coupled to the diaphragm, the driving device being capable of driving the reciprocating member with the working air at least in a direction that the diaphragm is retracted; and a working air switching device.

Abstract: A duplex reciprocating pump includes: a case member forming a pair of spaces; a movable partitioning member that partitions insides of these spaces into a first and second pump chamber and a first and second actuation chamber; a first switch valve mechanism provided with a first valve mechanism that switches supply of an actuation fluid to the first actuation chamber; a second switch valve mechanism provided with a second valve mechanism that switches supply of the actuation fluid to the second actuation chamber; a first switching mechanism that switches supply to the first switch valve mechanism of a control fluid; and a second switching mechanism that switches supply to the second switch valve mechanism of the control fluid, the first and second switching mechanisms switching supply so as to have an overlap period in which compression steps of the first and second pump chambers partially overlap.

Abstract: The pump device includes: a pump body which transfers a transfer fluid; a drive unit which drives the pump body; an operating unit which sets an operation of the drive unit; and a joint mechanism which attaches the operating unit to the drive unit. The drive unit includes a casing. The operating unit includes a user-accessible operating surface. The joint mechanism is attached to a wall surface of the casing so as to be rotationally operable about a first axis perpendicular to the wall surface and supports the operating unit such that the operating surface crosses a second axis perpendicular to the first axis and follows along an outer surface of the casing.

Abstract: Plunger pump includes cylinder having inside cylinder chamber; plunger disposed in cylinder to be relatively movable forward and backward to cylinder chamber so outer plunger's circumferential face is in slide contact with cylinder's inner circumferential face, and having cut face on distal end's outer periphery; and suction and discharge ports provided to cylinder to communicate with cylinder chamber, plunger pump transferring fluid by reciprocating plunger in axial direction while rotating plunger relative to cylinder chamber to let suction and discharges ports alternately communicate with cylinder chamber, wherein cylinder includes cylinder main body and spacer section being disposed in cylinder main body's inner portion of proximal end side, and sliding against plunger's portion closer to proximal end side than portion of plunger advancing and retracting into cylinder chamber, and plunger pump further includes seal section provided on cylinder's proximal end side for sealing cylinder main body, plunger an

Abstract: A duplex reciprocating pump includes: a case member forming a pair of spaces; a movable partitioning member that partitions insides of these spaces into a first and second pump chamber and a first and second actuation chamber; a first switch valve mechanism provided with a first valve mechanism that switches supply of an actuation fluid to the first actuation chamber; a second switch valve mechanism provided with a second valve mechanism that switches supply of the actuation fluid to the second actuation chamber; a first switching mechanism that switches supply to the first switch valve mechanism of a control fluid; and a second switching mechanism that switches supply to the second switch valve mechanism of the control fluid, the first and second switching mechanisms switching supply so as to have an overlap period in which compression steps of the first and second pump chambers partially overlap.

Abstract: A volume pump transfers a transfer fluid by expanding and contracting a bellows, and includes: the bellows that is capable of expanding and contracting, and has a bottomed cylindrical shape forming a pump chamber on its inside; a suction valve provided on a suction side of the pump chamber to guide the transfer fluid into the pump chamber; and a discharge valve provided on a discharge side of the pump chamber to discharge the transfer fluid from the pump chamber. The suction valve and the discharge valve each include a valve seat and a valve body. The valve body is configured from a flexible material and has: a fixed section whose positional relationship with the valve seat is fixed; and a valve section that extends in a certain direction between a direction directed from the fixed section to the valve seat and a direction that the transfer fluid moves.

Abstract: A plunger pump includes a cylinder section having a cylinder chamber and a spacer section sliding against a portion of the plunger closer to a proximal end side than a portion of a plunger advancing and retracting into the cylinder chamber. The cylinder section is made of a material having first hardness, and the spacer section being made of a resin material having second hardness softer than the first hardness. A length in an axial direction from a proximal end of a sliding portion of the spacer section sliding against the plunger to a distal end of the spacer section is larger than a maximum stroke length of reciprocation of the plunger.