Abstract: An actuator includes an electromagnetostrictive element that has one end located on a front side and the other end located on a rear side. An output shaft penetrates the electromagnetostrictive element and is pressurized toward the rear side of the electromagnetostrictive element. A housing houses therein the electromagnetostrictive element and the output shaft, and bearing portions respectively support the front side and the rear side of the output shaft. A bias spring is provided between the rear side of the output shaft and the housing, and a displacement sensor detects a position in an axial direction of the shaft.

Abstract: Fluid discharge device and method for intermittently discharging and feeding fluid in a constant amount with high speed and high precision, the fluid exemplified by various kinds of liquids such as adhesives, solder paste, fluorescent materials, electrode materials, greases, paints, hot melts, chemicals, foods and the like in production processes in the fields of electronic components, household electrical appliances, displays, and the like. By providing a fluid supply device for supplying the fluid to two surfaces that are moved relative to each other along a direction of a gap, a continuous flow supplied from the fluid supply device is converted into an intermittent flow by utilizing a pressure change due to a change in the gap of the relatively moving surfaces, while the intermittent discharge amount per dot is controlled by the rotational speed of the fluid supply device.

Abstract: An apparatus and a method for applying a fluid, which enable an application amount of the fluid to be stabilized even at the start of fluid discharge and at the end of the fluid discharge. The apparatus includes an application head and a control unit, whereby operational control is carried out so that a discharge member is rotated and moved in a discharge direction along an axial direction of the discharge member when the fluid is to be discharged, while the rotation of the discharge member is stopped and the discharge member is moved in a direction opposite to the discharge direction when the discharge is to be stopped. The application amount of the fluid to be applied can be stabilized even at the start of fluid discharge and at the end of the fluid discharge.

Abstract: A method for discharging fluid, includes while keeping two members relatively moving to each other along a gap direction of a gap formed by two opposing surfaces of the two members, feeding fluid from a fluid supply device to the gap, and intermittently discharging the fluid by utilizing a pressure change made by changing the gap, and controlling a fluid discharge amount per dot depending on pressure and flow rate characteristics of the fluid supply device.

Abstract: A method of applying fluid includes feeding fluid to between two faces disposed with a gap maintained therebetween and changing the gap between the two faces by driving of an actuator for intermittently discharging the fluid filled in between the two faces, wherein an input signal in which a high-frequency component and a DC component are superimposed is given to drive the actuator for changing the gap between two faces, so that the fluid filled in between the two faces is intermittently discharged for fluid application.

Abstract: In manufacturing a display panel of a PDP, a CRT, or the like, for example, a screen stripe is formed on a panel surface in a production cycle time equivalent to or faster than that of the screen printing system. By using a dispenser of a variable flow rate type for a display panel that has an effective display area in which a paste layer is formed and a non-effective display area in which no paste layer is formed outside this effective display area, paste discharge is promptly interrupted when a discharge nozzle runs through the non-effective display area of the display panel.

Abstract: Provided is a reduced pressure or pressurizing pump which can be used in a wide variety of fields of foods, pharmaceuticals, medical treatment, agriculture, healthcare equipment, room air conditioning, combustion, biotechnology, and so on. By the application of the present pump, there can be materialized, for example, an oxygen enriching apparatus or a nitrogen enriching apparatus, which have the features of an oil-free structure, a small size, compactness, low vibration, low noise, long operating life, and so on. A transport groove of a viscosity pump, which exerts a force feed action on the fluid, is formed at a relative displacement interface between a rotor and a housing, and the rotor supported by a bearing capable of coping with a high-speed rotation is rotated at high speed.

Abstract: A method of discharging a fluid, includes feeding a fluid into a gap defined between two surfaces in a closed space, and relatively oscillating the two surfaces to apply relative oscillation with high frequency to the gap so as to occur a squeeze pressure to the gap, and thus intermittently discharging the fed fluid through a discharge port provided in either one of the two surfaces by using the squeeze pressure.

Abstract: A fuel cell which provides less gas leakage, no deformation of the electrodes, and low producing cost is formed of a plurality of electrode units, each having an oxidant electrode, a fuel electrode, and a solid polymer electrolyte membrane sandwiched by the oxidant and fuel electrodes. The solid polymer electrolyte membrane has a larger area than the oxidant and fluid electrodes, and has an electrode contacting portion and an outer peripheral portion projecting from the electrode contacting portion. A gasket covers the outer peripheral portion of the solid polymer electrolyte membrane. A plurality of separators separates the electrode units, the electrode units and separators being stacked to form a fuel cell.

Abstract: A positive displacement pump is composed of a first actuator for relatively moving a piston and a housing, a cylinder for accommodating the piston, and a second actuator for relatively moving the cylinder and the housing.

Abstract: An apparatus and a method for applying a fluid are provided which enable an application amount of the fluid to be stabilized even at a fluid discharge start part and a fluid discharge end part. There are provided an application head and a control unit, whereby an operational control is carried out so that a discharge member is rotated and moved in a discharge direction along an axial direction of the discharge member when the fluid is to be discharged, while the rotation of the discharge member is stopped and the discharge member is moved in a direction opposite to the discharge direction when the discharge is to be stopped. The application amount of the fluid to be applied can be stabilized even at the fluid discharge start part and the fluid discharge end part.

Abstract: The fluid discharge device includes an axial drive device for giving an axial relative displacement to between a piston and a cylinder, a device for giving rotary motion, and a device for pressure feed of fluid. The ON/OFF control of discharge flow rate can be fulfilled by changing the fluid resistance of the discharge passage with the axial drive device.

Abstract: A method of discharging a fluid, includes feeding a fluid into a gap defined between two surfaces in a closed space, and relatively oscillating the two surfaces to apply relative oscillation with high frequency to the gap so as to occur a squeeze pressure to the gap, and thus intermittently discharging the fed fluid through a discharge port provided in either one of the two surfaces by using the squeeze pressure.

Abstract: An actuator includes an electromagnetostrictive element that has one end located on a front side and the other end located on a rear side, an output shaft that penetrates the electromagnetostrictive element and is pressurized toward the rear side of the electromagnetostrictive element, a housing that houses therein the electromagnetostrictive element and the output shaft, bearing portions that respectively support the front side and the rear side of the output shaft, a bias spring provided between the rear side of the output shaft and the housing, and a displacement sensor that detects a position in an axial direction of the shaft.

Abstract: A positive displacement pump is composed of a first actuator for moving a piston and a housing relatively, a cylinder for accommodating the piston, and a second actuator for moving the cylinder and the housing relatively.

Abstract: The fluid discharge device includes an axial drive device for giving an axial relative displacement to between a piston and a cylinder, a device for giving rotary motion, and a device for pressure feed of fluid. The ON/OFF control of discharge flow rate can be fulfilled by changing the fluid resistance of the discharge passage with the axial drive device.

Abstract: On the stationary side of a radial bearing constructed of a plurality of magnetic poles, the magnetic poles are formed into a shape such that the magnetic flux density distribution formed between the inner surfaces of these magnetic poles and a rotor located on the rotating side of the radial bearing has a distribution inclined from the magnetic pole end portion to the magnetic pole center portion. With this arrangement, the rate of change in magnetic flux density during the shift of the rotor from a magnetic pole to the adjacent magnetic pole is reduced, thereby reducing the eddy current loss and heat generation.

Abstract: An evacuating apparatus includes a first pump section disposed on a suction opening side, a second pump section for exhausting a smaller amount of gas than the first pump section, the second pump being disposed in an exhaust opening side, a plurality of rotors accommodated in a housing, bearings for supporting rotation of the rotors, a suction opening for drawing fluid and a first exhaust opening thereof both formed on the housing, and a plurality of motors for driving the rotors. In the apparatus, the first pump section is a pump of positive displacement type formed by utilizing a volume change of a space defined by the rotors and the housing, and the second pump section is a viscous-type pump formed by utilizing a relatively moving surface formed in a small gap defined between the rotors and the housing.

Abstract: A positive displacement vacuum pump, in which a plurality of rotors are driven into synchronous operation by independent motors, uses a rotational position sensor making use of the electromagnetic induction effect for obtaining rotational position information for the individual shafts. The rotational position sensor is cooled.

Abstract: A vacuum pump includes a plurality of rotors of different outer diameters accommodated in a housing so that a fluid transportation space is defined by the housing and the plural rotors. Rotary shafts are integrally formed with the respective rotors and a first motor, which is a high frequency motor, for driving the rotary shaft of the smaller diameter rotor as a driving shaft. A second motor, which is an AC servo motor or pulse motor, is provided for driving the other rotary shaft as a driven shaft. A rotation detecting device is provided adjacent each shaft for detecting rotating angles and/or rotating speeds of the first and second motors. Also provided is a fluid suction port and a fluid discharge port which are formed in the housing, and a control device for controlling rotation of the driven shaft based on data from the rotation detecting device so as to synchronize the rotation of the driven shaft driven by the second motor with that of the driving shaft driven by the first motor.