Abstract: Rankine cycle apparatus, having closed working medium circulation circuitry, includes a collection mechanism for collecting a working medium leaked or discharged out of the circulation circuitry. The working medium collected via the collection mechanism is stored in an open tank, and the thus-stored liquid-phase working medium is returned to a condenser by means of a return pump.

Abstract: When a flow of a working medium stagnates in an expander or evaporator of a Rankine cycle apparatus including a closed working medium circulation circuit, a high pressure exceeding an allowable maximum pressure level of the expander or evaporator is produced within the closed working medium circulation circuit. In such a case, the water-phase working medium is first discharged via relief valves out of the circulation circuit, so that the pressure within the circulation circuit can be lowered. Then, once vapor within the evaporator, having been lowered in temperature and pressure, flows backward within the closed working medium circulation circuit, the vapor is also discharged via the relief valves out of the circulation circuit. In this way, the pressure within the expander or evaporator can be reliably prevented from exceeding the allowable maximum pressure level.

Abstract: Rankine cycle apparatus, having closed working medium circulation circuitry, includes a collection mechanism for collecting a working medium leaked or discharged out of the circulation circuitry. The working medium collected via the collection mechanism is stored in an open tank, and the thus-stored liquid-phase working medium is returned to a condenser by means of a return pump.

Abstract: The present invention provides a adhesive sheet which comprises a base material, a photocured urethane resin layer formed on all or a part of a surface of the base material or a surface of backside of the base material and an adhesive layer, wherein the adhesive layer comprises a polyurethane adhesive, and has a ball tack value of not more than 3 and a pressure-sensitive adhesive strength value to stainless steel board in Japanese Industrial Standard Z0237 of not more than 2 N/cm and a method of preparing thereof.

Abstract: A vane type fluid machine includes: a casing; a rotor rotating in the casing; and a plurality of vanes supported by the rotor to slide on an inner surface of the casing. A seal portion of each vane is formed to be elastically deformable so as to slide on the inner surface of the casing while bending backward of a rotational direction of the rotor. Therefore, an improved structure of the seal portion of each vane secures good sealing performance even if machining accuracy of the inner surface of the casing is alleviated.

Abstract: In a fluid conveying apparatus in which there is provided, in a flow passage of a fluid, a platelike oscillator which is vibrated with an upstream end thereof, as seen in a flow direction of the fluid, as a fixed end and a downstream end thereof as a free end, the oscillator is divided into minute oscillators of smaller length. The minute oscillators are disposed in longitudinally (back and forth) multiple stages inside the flow passage. A sufficient conveying capacity can thus be obtained even if the flow passage is small in width.

Abstract: A piezoelectric fan comprises at least one piezoelectric element having a rectangular piezoelectric plate of large aspect ratio, made from a piezoelectric material, and conductive metal layers provided on both surfaces of the piezoelectric plate. At least one of the conductive metal layers has a plurality of reinforcing ribs extending parallel to the long side of the piezoelectric element and formed integrally with the conductive metal layers or as a separate member collectively. The reinforcing ribs increase the long side direction rigidity of the piezoelectric element. As a result, the long side direction or lateral mode resonance of the piezoelectric element can be suppressed, thus increasing the blow efficiency of the piezoelectric fan.

Abstract: A workpiece and a grinding wheel are rotated and the grinding wheel is moved in a direction parallel to the rotational axis of the workplace so as to grind a cylindrical surface of the workpiece. After a part of the cylindrical surface is ground, a rest device is advanced towards the workpiece so as to support the part of the cylindrical surface of the workpiece which has been ground. Under the condition, the remaining portion of the cylindrical surface of the workpiece is ground.

Abstract: A heat exchanger has heat exchange members for performing heat exchanging with a fluid to flow along surfaces thereof. Fins are fixed, at only one end thereof in the direction of flow of the fluid, to the respective heat exchange members in a cantilevered manner. Each of the fins has a piezoelectric material layer laminated on at least one of the surfaces of each fin. Vibrations are given to the fins, with the fixed end thereof operating as a fulcrum, by applying an alternating voltage to the piezoelectric material layer such that the fins are extended and contracted in the direction of the flow of the fluid. As a modified example, each fin may be provided at its rear end with a weight. Piezoelectric actuators are disposed inside a frame in which the heat exchanger is contained, in a manner to pinch the heat exchanger in a vertical direction. By causing the actuators to vibrate, the fins are also vibrated.

Abstract: A machine tool having a grinding wheel for grinding a workpiece mounted on a table. The machine tool is provided with a truing apparatus for truing the grinding wheel and a measuring device for measuring the diameter of the grinding wheel after every truing operation. Both of the truing apparatus and the measuring device are mounted on a movable base. The movable base is moved between its retract position at the outside of the table and a forward position above the table. The movable base is move to the forward position to bring the truing apparatus and the touch sensor into predetermined positions for truing and measuring operations. After the truing and measuring operations, the movable base is moved away from the table and is retracted to its retract position. The truing apparatus is provided with a truer support shaft whose rotational shaft intersects with a horizontal plane with an angle of 45.degree., and a truer attached to the truer support shaft.

Abstract: A rotary diamond tool for truing a grinding wheel, comprising one or two circular vapor-deposited base plates each having a thin diamond layer formed by a vapor deposition process such as electron assisted chemical vapor deposition or direct current plasma chemical vapor deposition. The diamond truing tool is further provided with a pair of backup plates brazed on both side surfaces of the one or two circular vapor-deposited base plates so that the stiffness of the diamond truing tool is increased.

Abstract: A grinding wheel which is formed from super hard abrasive grains is trued by traverse-feeding a truing tool a plurality of times (n). Among the (n) traverse feeds of the truing tool, every traverse feed except for the final (i.e., from the first to the (n-l)th traverse feed) is carried out with an infeed which is set at a relatively small value in order to remove any deflection of the grinding wheel. In the final traverse feed, the infeed of the truing tool is set at a relatively large value in order to form an excellent cutting edge on the grinding wheel. Accordingly, any deflection of the grinding wheel is removed by a plurality of traverse feeds of the truing tool carried out with a relatively small infeed, and a cutting face having an excellent cutting ability is formed on the grinding wheel by the final traverse feed carried out with a relatively large infeed.

Abstract: A cam grinding machine of the type in which a grinding wheel is moved toward and away from a cam shaft rotatably supported on a table, thereby to shape intake and exhaust cams of said cam shaft to predetermined profiles, the cam grinding machine comprising: means for detecting the machined condition of the cams in spark-out grinding; means for setting spark-out ending conditions separately for the intake and exhaust cams; means for judging whether the machined condition in spark-out has reached a level complying with the spark-out ending condition, separately with respect to the intake and exhaust cams; and means for stopping the spark-out when the machined condition comes into compliance with the spark-out ending condition.