Abstract: A grindstone that enables grinding, polishing, super-finish polishing by using the same grindstone, without clogging even if the grindstone is being used continuously, in which a grinding/polishing section for processing a workpiece has a honeycomb structure formed by arranging polygonal prisms with no clearance therebetween. The grindstone includes the grindstone columns consisting of abrasive grains and binder and having an axis in depth direction of grinding/polishing surface, which are disposed on intersections or wall portions of the honeycomb structure. Porous elastomer is disposed inside the honeycomb structure, thus making it possible to perform a super-finish polishing.

Abstract: [Problem] To provide a grindstone and a grinding/polishing device using same with which, in addition to it being possible to perform the three processes of rough processing, lapping, and polishing with the same device: double-sided processing is also possible; processing rate does not decrease even when used continuously; and dressing can be omitted. [Solution] A grindstone for grinding/polishing workpieces, the grindstone being characterized in comprising multiple grindstone pillars, which are obtained from a binding agents and abrasive grains for grinding/polishing the workpieces and disposed in parallel with an axis (L) in the depth direction of the grinding/polishing surface, and the grindstone matrix integrally formed with the grindstone pillars, and a grinding/polishing device using said grindstone.

Abstract: A grindstone that enables grinding, polishing, super-finish polishing by using the same grindstone, without clogging even if the grindstone is being used continuously, in which a grinding/polishing section for processing a workpiece has a honeycomb structure formed by arranging polygonal prisms with no clearance therebetween. The grindstone includes the grindstone columns consisting of abrasive grains and binder and having an axis in depth direction of grinding/polishing surface, which are disposed on intersections or wall portions of the honeycomb structure. Porous elastomer is disposed inside the honeycomb structure, thus making it possible to perform a super-finish polishing.

Abstract: A conveying pad, a conveying apparatus and a conveying method using the conveying pad, capable of exactly attracting and fixing an object placed on a part of a conveying surface or levitating the object, by virtue of an attracting force or levitating force of the conveying pad. The conveying pad is made of a porous substrate communicated with a large number of pores, and by depressurizing or pressurizing the back surface of the conveying pad, an object W placed on the front surface of the conveying pad is attracted or levitated, thus satisfying a relational equation between an area ratio a of the object covering the surface of the conveying pad and a conductance ratio ?.

Abstract: [Problem] To provide a grindstone and a grinding/polishing device using same with which, in addition to it being possible to perform the three processes of rough processing, lapping, and polishing with the same device: double-sided processing is also possible; processing rate does not decrease even when used continuously; and dressing can be omitted. [Solution] A grindstone for grinding/polishing workpieces, the grindstone being characterized in comprising multiple grindstone pillars, which are obtained from a binding agents and abrasive grains for grinding/polishing the workpieces and disposed in parallel with an axis (L) in the depth direction of the grinding/polishing surface, and the grindstone matrix integrally formed with the grindstone pillars, and a grinding/polishing device using said grindstone.

Abstract: The invention relates to a combustion gas seal for injectors and to a seal structure disposed therewith, for preventing leakage of combustion gas in a state in which an injector is mounted to an engine head. And, the number of parts is reduced, vibration and noise are reduced, and sealing performance is improved. A tapered surface, in which an clearance between the tapered surface and an inner peripheral surface of a mounting hole of the engine head narrows from an engine bore side towards an atmospheric side, is disposed at a groove bottom of an attachment groove of the injector, and an abutment portion that abuts against the tapered surface is disposed at the combustion gas seal for injectors.

Abstract: In a fuel injection valve body for a direct injection type internal combustion engine, an entire nozzle body tip portion is formed in a conical shape protruding from a nozzle body outer peripheral surface covered with a cap. Therefore, neither a corner portion or a recessed portion is formed on a surface of the nozzle body tip portion. This prevents heat generated by combustion from concentrating at a corner portion or a surface area from enlarging by a recessed portion, which in turn prevents heat generated by combustion from increasing the temperature of the nozzle body tip portion. Moreover, since a foremost portion of a spherical shape is formed such that it does not form a corner portion or a recessed portion in a peripheral portion of a conical shape, heat generated by combustion does not increase the temperature of the nozzle body tip portion. The temperature of a nozzle hole can therefore be prevented from increasing and accumulation of deposits can be restricted.

Abstract: The invention relates to a combustion gas seal for injectors and to a seal structure disposed therewith, for preventing leakage of combustion gas in a state in which an injector is mounted to an engine head. And, the number of parts is reduced, vibration and noise are reduced, and sealing performance is improved. A tapered surface, in which an clearance between the tapered surface and an inner peripheral surface of a mounting hole of the engine head narrows from an engine bore side towards an atmospheric side, is disposed at a groove bottom of an attachment groove of the injector, and an abutment portion that abuts against the tapered surface is disposed at the combustion gas seal for injectors.

Abstract: In a fuel injection valve body for a direct injection type internal combustion engine, an entire nozzle body tip portion is formed in a conical shape protruding from a nozzle body outer peripheral surface covered with a cap. Therefore, neither a corner portion or a recessed portion is formed on a surface of the nozzle body tip portion. This prevents heat generated by combustion from concentrating at a corner portion or a surface area from enlarging by a recessed portion, which in turn prevents heat generated by combustion from increasing the temperature of the nozzle body tip portion. Moreover, since a foremost portion of a spherical shape is formed such that it does not form a corner portion or a recessed portion in a peripheral portion of a conical shape, heat generated by combustion does not increase the temperature of the nozzle body tip portion. The temperature of a nozzle hole can therefore be prevented from increasing and accumulation of deposits can be restricted.

Abstract: A built-in amplifier type combustion pressure sensor which can be assembled by simplified operation. A pressure detecting device is fixed to one end of a housing with leads extending inside the housing. The leads are bent in a predetermined form by inserting a spacer and a cover from an opening of the housing located on the opposite side of the pressure detecting device. An amplifier circuit board is inserted into the housing from the opening so that the leads are inserted into holes provided on the amplifier circuit board and protrude from the surface of the amplifier circuit board facing the opening side. The protruding end of each lead is connected to the amplifier circuit board.