Abstract: An auxiliary valve member, an auxiliary pilot pressure chamber for applying a pilot fluid pressure to the auxiliary valve body, and a transmitting rod for transmitting operating force of the auxiliary valve body to a main diaphragm are provided other than the main diaphragm which is in contact with or separating from a main valve seat by operating by means of application of the pilot fluid pressure in a diaphragm valve portion, as a mechanism for strengthening valve-closing force of the main diaphragm, so as for the main diaphragm not to be separated from the valve seat even when the fluid pressure from a load is applied to the main diaphragm as adverse pressure.

Abstract: A linear-type tape storage magnetic head device in which track density and the response of a magnetic head is improved is provided. A sliding portion constituting a main sliding surface in contact with a magnetic tape T and a magnetic head element chip portion. A tracking mechanism has a two-stage tracking mechanism of a rough-move tracking mechanism and a fine-move tracking mechanism, with the magnetic head element chip pardon being directly disposed in the fine-move tracking mechanism and the fine-move tracking mechanism being disposed in the rough-move tracking mechanism; the rough-move tracking mechanism makes the magnetic head element chip portion move across the tracks arranged in parallel in the width direction of the magnetic tape T; and the magnetic head element chip portion made lighter in weight provides improved speed-up and accuracy of tracking and high density of the tracks can be obtained.

Abstract: An ultrasonic diagnostic apparatus is disclosed which can reduce the device amount of a receiving circuit, while obtaining the shape of an excellent received beam. In this ultrasonic diagnostic apparatus, a plurality of transducer elements are arrayed and used as an ultrasonic probe, and the transducer elements are driven by a plurality of transmission driving circuit. The signal received by the transducer element is distributed to any of a plurality of input terminals of a cross point switch beam former. The received signals of the three transducer elements near the center of the aperture of the ultrasonic probe are added and inputted to one terminal of a beam former. The second, fourth and sixth transducer elements at the end of the aperture are not connected to the beam former. The signals received by the transducer elements are delay-added by the beam former. The delay precision can be improved, and the beam shape can be made sharper, thereby improving the image quality of the ultrasonic image.

Abstract: In general, the invention provides a magnetic head device and linear tape drive that increase the resonant frequency and the range of a servo system. In particular, the invention provides a magnetic head device comprising a magnetic head chip with multiple magnetic head elements that is a structural part of the fine positioning system which allows the magnetic head elements follow the data tracks on the linear magnetic tape. Consequently, weight is reduced thereby increasing the resonant frequency and servo bandwidth. In another embodiment, the invention provides a magnetic head comprising bimodal actuators that are formed into an S shape and displaced by applying voltage where the polarization direction is opposite from one end to the other. In particular, the head chip may remain stable and may be driven dynamically thereby allowing the mechanical resonance of the bimodal actuator (including the head chip) to increase to 1 kHz or higher.

Abstract: A linear-type tape storage magnetic head device in which truck density and the response of a magnetic head is improved is provided.

Abstract: In general, the invention provides a magnetic head device and linear tape drive that widen the high frequency side of the servo range. In particular, the invention provides a magnetic head device comprising a magnetic head chip with multiple magnetic elements arranged for recording or playback of multiple tracks and a fine positioning structure that uses a bimodal construction that may widen the high frequency side of the servo range by increasing the resonant frequency of the magnetic head chip including the tracking structure and lowering the Q value of the resonance point. In addition, the invention includes a damping structure suitable for the fine positioning structure that improves high speed response by widening the range in which the magnetic head device can be used for a servo. The magnetic head device may use a linear tape drive method.

Abstract: An ultrasonic diagnostic apparatus is disclosed which can reduce the device amount of a receiving circuit, while obtaining the shape of an excellent received beam. In this ultrasonic diagnostic apparatus, a plurality of transducer elements are arrayed and used as an ultrasonic probe, and the transducer elements are driven by a plurality of transmission driving circuit. The signal received by the transducer element is distributed to any of a plurality of input terminals of a cross point switch beam former. The received signals of the three transducer elements near the center of the aperture of the ultrasonic probe are added and inputted to one terminal of a beam former. The second, fourth and sixth transducer elements at the end of the aperture are not connected to the beam former. The signals received by the transducer elements are delay-added by the beam former. The delay precision can be improved, and the beam shape can be made sharper, thereby improving the image quality of the ultrasonic image.

Abstract: In a fuel pump having a high pump efficiency, an annular portion is formed on an outer periphery of an impeller to let one- and opposite-side blade grooves be independent of each other. Then, various improvements are made such as tilting front and rear wall surfaces of the blade grooves in a predetermined direction, forming one- and opposite-side blade grooves in a zigzag fashion, forming a guide surface in a communicating passage of a pump housing, and forming communicating holes in an impeller.

Abstract: In a fuel injection valve having a housing pipe, a valve movable reciprocatingly and axially inside the housing pipe, and a body valve having a bottom wall constituting a valve seat with which the valve comes in contact and a side wall whose axial end is connected to a circumferential periphery of the bottom wall and whose the other axial end is fitted to and heat bonded to an end of the housing pipe, the side wall is provided on an outer circumference thereof with a ring shaped groove that is formed in advance before the body valve and the housing pipe are heat bonded to each other and serves to prevent a deformation of the side wall due to heat generated by the heat bonding from being transmitted straight to the valve seat.

Abstract: In a fuel pump having a high pump efficiency, an annular portion is formed on an outer periphery of an impeller to let one- and opposite-side blade grooves be independent of each other. Then, various improvements are made such as tilting front and rear wall surfaces of the blade grooves in a predetermined direction, forming one- and opposite-side blade grooves in a zigzag fashion, forming a guide surface in a communicating passage of a pump housing, and forming communicating holes in an impeller.

Abstract: Compounds of formula I wherein R1, R2, and R3 independently of one another are hydrogen; C1-C20alkyl which is unsubstituted or substituted by OH, C1-C4alkoxy, C1-C4alkylthio, phenylthio, F, Cl, Br, I, CN, (C1-8alkyl)O—(CO)—, (C1-C4alkyl)—(CO)O— or/and di(C1-C4alkyl)amino; or R1, R2, and R3 independently of one another are C3-C6alkenyl; phenyl which is unsubstituted or substituted by OH, C1-C4alkoxy, C1-C4alkylthio, phenylthio, F, Cl, Br, I, CN, (C1-C8alkyl)O(CO)—, (C1-C4alkyl)—(CO)O— or/— and di(C1-C4alkyl)amino; or R1 and R2 together are C2-C9alkylene, o-xylylene, 2-butenylene, C3-C9oxaalkylene or C3-C9azaalkylene; R4, R5, R6, and R7 independently of one another are sec-C3-C20alkyl, tert-C4-C20alkyl or phenyl wherein these radicals are unsubstituted or substituted by OH, C1-C4alkoxy, C1-C4alkylthio, phenylthio, F, Cl, Br, I, CN, (C1-C8alkyl)O(CO)—, (C1-C4alkyl)—(CO)O— or/and di(C1-C4alkyl)amino; or R4 and R5, and/or R6 and R7

Abstract: In a fuel injection valve having a housing pipe, a valve movable reciprocatingly and axially inside the housing pipe, and a body valve having a bottom wall constituting a valve seat with which the valve comes in contact and a side wall whose axial end is connected to a circumferential periphery of the bottom wall and whose the other axial end is fitted to and heat bonded to an end of the housing pipe, the side wall is provided on an outer circumference thereof with a ring shaped groove that is formed in advance before the body valve and the housing pipe are heat bonded to each other and serves to prevent a deformation of the side wall due to heat generated by the heat bonding from being transmitted straight to the valve seat.

Abstract: An error control method for wireless data transmission over a digital mobile communication system includes a step of obtaining, during data communication, statistical information including transmission error information at a receiving side, a step of determining an error control strategy and/or a value of at least one parameter of the error control strategy which are/is optimum for transmission path conditions at that time, based upon the obtained statistical information, and a step of using the determined error control strategy and/or the at least one parameter for the error control during data communication.

Abstract: The present invention makes it possible to obtain good characteristics of forming sprays of fuel jetted through a plurality of injection ports of a fuel injection valve with respect to separation of sprays in different directions, atomization, jetting angles and penetrating force.Fuel jetted through the injection ports of the fuel injection valve is jetted in separate jets from a plurality of fuel flow separating holes of a sleeve nozzle. On the other hand, band-like assist air flows are jetted in a two-dimensional manner from slit-like air holes opened on the opposite sides of the fuel flow separating holes to impinge obliquely against the jetted fuel. Atomization of fuel jetted through the plurality of fuel flow separating holes is thereby promoted and fuel sprays are accurately separated and supplied independently in two directions toward two intake valves while the directions of jets from the injection ports of the fuel injection valve are maintained, thus injecting and supplying fuel.

Abstract: A method for preparing an optically active succinic acid compound involves hydrogenating an itaconic acid compound in the presence of a rhodium compound and a 2,2"-bis(1-(hydrocarbon residue-substituted) phosphine-substituted alkyl)-1,1"-biferrocene compound.

Abstract: Disclosed are an Fe-based alloy powder adapted for sintering, an Fe-based sintered alloy, and a process for producing the Fe-based sintered alloy. The Fe-based alloy powder or the matrix of the Fe-based sintered alloy consists, percent by weight, essentially of 2.0 to 15% Co, 2.0 to 10% Mo, and the balance of Fe and inevitable impurities. The Fe-based alloy powder exhibits superb compressibility and corrosion resistance, and accordingly the Fe-based sintered alloy made therefrom exhibits excellent wear resistance, corrosion resistance and oxidation resistance. The Fe-based sintered alloy is further improved in the excellent properties by dispersing novel Ni-based alloy hard particles in the matrix.

Abstract: Disclosed are an Fe-based alloy powder adapted for sintering, an Fe-based sintered alloy, and a process for producing the Fe-based sintered alloy. The Fe-based alloy powder or the matrix of the Fe-based sintered alloy consists, percent by weight, essentially of 2.0 to 15% Co, 2.0 to 10% Mo, and the balance of Fe and inevitable impurities. The Fe-based alloy powder exhibits superb compressibility and corrosion resistance, and accordingly the Fe-based sintered alloy made therefrom exhibits excellent wear resistance, corrosion resistance and oxidation resistance. The Fe-based sintered alloy is further improved in the excellent properties by dispersing novel Ni-based alloy hard particles in the matrix.

Abstract: Disclosed are an Fe-based alloy powder adapted for sintering, an Fe-based sintered alloy, and a process for producing the Fe-based sintered alloy. The Fe-based alloy powder or the matrix of the Fe-based sintered alloy consists, percent by weight, essentially of 2.0 to 15% Co, 2.0 to 10% Mo, and the balance of Fe and inevitable impurities. The Fe-based alloy powder exhibits superb compressibility and corrosion resistance, and accordingly the Fe-based sintered alloy made therefrom exhibits excellent wear resistance, corrosion resistance and oxidation resistance. The Fe-based sintered alloy is further improved in the excellent properties by dispersing novel Ni-based alloy hard particles in the matrix.

Abstract: A fuel feed apparatus having assist air passages that improve the fuel flow to an internal combustion engine. The fuel feed apparatus includes a fuel injection valve having a fuel injection nozzle body, and a resin cover member having both a fuel passage and an air assist passage. The cover member is press fit to the fuel injection body. The fuel feed apparatus further includes a ring member formed of metallic material and attached to an inner surface of the cover member.

Abstract: A hard facing chromium-base alloy consisting essentially of 30.0 to 48.0% by weight of nickel. 1.5 to 15.0% by weight of tungsten and/or 1.0 to 6.5% by weight of molybdenum, the balance being more than 40.0% by weight of chromium, and the maximum sum of tungsten and molybdenum being 15.0% by weight. The alloy may also contain one or more of iron, cobalt, carbon, boron, aluminum, silicon, niobium and titanium. When the alloy is used in powder form as a material for hard facing by welding, the alloy may further contain 0.01 to 0.12% by weight of aluminum, yttrium, misch metal, titanium, zirconium and hafnium. 0.01 to 0.1% by weight of oxygen may also be added to the alloy. The alloy has a high degree of toughness wear resistance and corrosion resistance. The alloy can be used as a hard facing material to be applied to various objects, such as automobile engine valves.