Abstract: A magnetic disc apparatus has a ramp holding the magnetic head in a position apart from the magnetic disc and a filter case holding a filter in the state of being bent in such a manner that the filter surrounds the ramp together with the magnetic disc. The filter removes dust in airflow which flows in the magnetic disc apparatus accompanying the rotation of the magnetic disc.

Abstract: First and second shroud surfaces are defined along an imaginary cylinder coaxial to a recording disk. A shroud plate is located between the first and second shroud surfaces. Airflow flows outward along the surface of the rotating recording disk based on the centrifugal force. The shroud plate serves to establish the continuity of the first and second shroud surfaces. The first and second shroud surfaces and the shroud plate serve to reliably suppress turbulence of the airflow. Vibration of the recording disk is suppressed than ever. An inflow opening is located in a space between the first and second shroud surfaces. The rectifier plate is located downstream of the inflow opening. The rectifier plate serves to direct the airflow flowing along the first shroud surface to the inflow opening. A larger amount of airflow can be introduced into the inflow opening. A dust catcher receives airflow of a sufficient amount.

Abstract: A gear part of the present invention includes a lubrication coating formed on a surface of the gear part, the lubrication coating containing an organic phosphorous compound. In the gear part, when a tooth surface of the gear part is engaged with a tooth surface of a counter member, the organic phosphorous compound is transferred to the tooth surface of the counter member and another lubrication coating containing the organic phosphorous compound is formed on the tooth surface of the counter member. As a result, the lubrication coating can be held on the surface of the gear part for long periods.

Abstract: A storage device includes plural recording media, a housing configured to accommodate the plural recording media, a plate that is fixed and extends round between two adjacent recording media in the housing, plural sliders each of which is mounted with a magnetic head that is configured to record information in or reproduce the information from a corresponding one of the plural recording media, and plural arms, each of which is mounted with one of the plural sliders only on a single surface, and configured to move the one of the plural sliders.

Abstract: A hard disk drive includes a base having a bottom plate. A magnetic body is embedded in the bottom plate. The magnetic body is allowed to serve as a magnetic shield in the hard disk drive. The magnetic body is allowed to have a sufficient thickness without requiring an additional space outside the base, since the magnetic body is embedded in the base. The magnetic field directed outside the base can reliably be absorbed at the magnetic body. The magnetic body may be received in a depression defined in the bottom plate. The depression may be formed based on a reduction in the thickness of the bottom plate.

Abstract: A magnetic disk device includes a swing-type head actuator which is driven by a voice coil motor. The voice coil motor is cooled by an airflow generated when a magnetic disk accommodated in a disk accommodating unit of an enclosure is rotated by a spindle motor. An airflow dividing member provided on an inner wall or a base of an actuator accommodating unit divides the airflow generated by the rotation of the disk and passing along the inner wall. The divided airflow is introduced to a coil part of the voice coil motor, and cools the coil, without sacrificing the dust purge performance.

Abstract: A disk apparatus includes a ramp which holds a tip end of an arm at a position away from a disk, and a slit shroud having an airflow control plate. A side surface of the airflow control plate is opposed to a side surface of the disk, the airflow control plate spreads to a position where the airflow control plate is superposed on the tip end of the arm held by the ramp. The airflow control plate has the same thickness as that of the disk, and is flush with the disk 12.

Abstract: An engine for a vehicle for which the work of replacing an oil filter or an oil cooler is easily executed. The vehicle engine is provided with a crank case, a cylinder head having an exhaust passage outlet in a front face, an oil pan being independently formed from the crank case and attached to a lower surface of the crank case, an oil supply path communicating the oil pan with lubricated positions of the engine so as to circulate oil in the oil pan, an oil pump drawing the oil from the oil pan and pressure feeding the oil to the lubricated positions via the oil supply path, and an oil filter or an oil cooler interposed in the middle of the oil supply path and attached to a front face, a side face or a rear face of the oil pan.

Abstract: The present invention provides a generator cooling system of an engine which can supply sufficient cooling oil to a generator even during low speed operation, without complicating an oil passage formed within a wall of a crankcase. In the generator cooling system of the engine having a generator accommodated in a generator room which is formed at an end portion of the crankcase in a longitudinal direction of a crankshaft of the engine, the generator cooling system is provided with an oil passage formed to the crankcase in a position lower than an axis of the crankshaft, and an oil nozzle provided in the oil passage for injecting oil of the oil passage toward a lower portion within the generator room.

Abstract: The invention provides an engine for a vehicle which can easily execute a replacing work of an oil filter or an oil cooler. The vehicle engine is provided with a crank case, a cylinder head having an exhaust passage outlet in a front face, an oil pan being independently formed from the crank case and attached to a lower surface of the crank case, an oil supply path communicating the oil pan with of lubricated positions of the engine so as to circulate oil in the oil pan, an oil pump drawing the oil from the oil pan and pressure feeding the oil to the lubricated positions via the oil supply path, and an oil filter or an oil cooler interposed in the middle of the oil supply path and attached to a front face, a side face or a rear face of the oil pan.

Abstract: The present invention provides a generator cooling system of an engine which can supply a sufficient cooling oil to a generator even at a time of a low speed operation, without complicating an oil passage formed within a wall of a crank case. In the generator cooling system of the engine having a generator accommodated in a generator room which is formed at an end portion of the crank case in a longitudinal direction of a crank shaft of the engine, the generator cooling system is provided with an oil passage formed to the crank case in a lower position than an axis of the crank shaft, and an oil nozzle for provided in the oil passage injecting oil of the oil passage toward a lower portion within the generator room.

Abstract: A magnetic disc apparatus has a ramp holding the magnetic head in a position apart from the magnetic disc and a filter case holding a filter in the state of being bent in such a manner that the filter surrounds the ramp together with the magnetic disc. The filter removes dust in airflow which flows in the magnetic disc apparatus accompanying the rotation of the magnetic disc.

Abstract: First and second shroud surfaces are defined along an imaginary cylinder coaxial to a recording disk. A shroud plate is located between the first and second shroud surfaces. Airflow flows outward along the surface of the rotating recording disk based on the centrifugal force. The shroud plate serves to establish the continuity of the first and second shroud surfaces. The first and second shroud surfaces and the shroud plate serve to reliably suppress turbulence of the airflow. Vibration of the recording disk is suppressed than ever. An inflow opening is located in a space between the first and second shroud surfaces. The rectifier plate is located downstream of the inflow opening. The rectifier plate serves to direct the airflow flowing along the first shroud surface to the inflow opening. A larger amount of airflow can be introduced into the inflow opening. A dust catcher receives airflow of a sufficient amount.

Abstract: There is provided a multicylinder four-cycle combustion engine, in which a communication hole is formed, to allow gases to flow smoothly form one cylinder to another so that the pumping loss occurring within the cylinders can be reduced. The combustion engine (E) includes an engine casing (EC) having defined therein a plurality of cylinders (2A to 2D), each having a cylinder bore (20A to 20D), and a crank chamber (30A to 30D) below the respective cylinder bore. A partition wall (21) separating the neighbor cylinder bores (20A, 20B; 20C, 20D) of the cylinders (2A to 2D) and the crank chambers (30A to 30D) from each other is formed with a communication hole (4). An open edge portion (4aa) of the uppermost edge (4a) thereof, which opens into the cylinder bore (20A to 20D) has a circumferentially intermediate major portion extending in a direction substantially perpendicular to the cylinder longitudinal axis (CH).

Abstract: There is provided a lubricating device for a motorcycle combustion engine, which allows the motorcycle to exhibit a desired banking angle and also to have a lower center of gravity. The lubricating device is designed to supply a lubricant oil to an in-line multicylinder combustion engine (E) mounted on a motorcycle frame structure (FR) and having a crankcase (CR) and includes a main gallery (21) formed in a lower portion of the crankcase (CR) and journal oiling passages (25) branched off from the main gallery (21) for supplying the lubricant oil towards crank journals (23b) of a crankshaft (23) of the engine. The main gallery (21) has opposite end portions (21a, 21a) inclined to extend outwardly upwardly.

Abstract: A first shroud and a second shroud are opposed to the peripheral end surface of a recording disk at a certain constant distance. The second shroud is spaced downstream from the first shroud in the direction of the rotation of the recording disk. A shroud plate is opposed to the peripheral end surface of the recording disk at a position between the first and second shrouds. The shroud plate functions as a shroud. The shroud plate serves to suppress turbulence of airflow. Vibration of the recording disk can be suppressed. Moreover, if the shroud plate is designed to extend along a virtual plane perpendicular to the rotation axis of the recording disk, the airflow is prevented from staying between the first and second shrouds. The airflow can effectively be taken out. The airflow can effectively be utilized.

Abstract: A hard disk drive includes a base having a bottom plate. A magnetic body is embedded in the bottom plate. The magnetic body is allowed to serve as a magnetic shield in the hard disk drive. The magnetic body is allowed to have a sufficient thickness without requiring an additional space outside the base, since the magnetic body is embedded in the base. The magnetic field directed outside the base can reliably be absorbed at the magnetic body. The magnetic body may be received in a depression defined in the bottom plate. The depression may be formed based on a reduction in the thickness of the bottom plate.

Abstract: A gear part of the present invention includes a lubrication coating formed on a surface of the gear part, the lubrication coating containing an organic phosphorous compound. In the gear part, when a tooth surface of the gear part is engaged with a tooth surface of a counter member, the organic phosphorous compound is transferred to the tooth surface of the counter member and another lubrication coating containing the organic phosphorous compound is formed on the tooth surface of the counter member. As a result, the lubrication coating can be held on the surface of the gear part for long periods.

Abstract: There is provided a lubricating device for a motorcycle combustion engine, which allows the motorcycle to exhibit a desired banking angle and also to have a lower center of gravity. The lubricating device is designed to supply a lubricant oil to an in-line multicylinder combustion engine (E) mounted on a motorcycle frame structure (FR) and having a crankcase (CR) and includes a main gallery (21) formed in a lower portion of the crankcase (CR) and journal oiling passages (25) branched off from the main gallery (21) for supplying the lubricant oil towards crank journals (23b) of a crankshaft (23) of the engine. The main gallery (21) has opposite end portions (21a, 21a) inclined to extend outwardly upwardly.

Abstract: There is provided a multicylinder four-cycle combustion engine, in which a communication hole is formed, to allow gases to flow smoothly form one cylinder to another so that the pumping loss occurring within the cylinders can be reduced. The combustion engine (E) includes an engine casing (EC) having defined therein a plurality of cylinders (2A to 2D), each having a cylinder bore (20A to 20D), and a crank chamber (30A to 30D) below the respective cylinder bore. A partition wall (21) separating the neighbor cylinder bores (20A, 20B; 20C, 20D) of the cylinders (2A to 2D) and the crank chambers (30A to 30D) from each other is formed with a communication hole (4). An open edge portion (4aa) of the uppermost edge (4a) thereof, which opens into the cylinder bore (20A to 20D) has a circumferentially intermediate major portion extending in a direction substantially perpendicular to the cylinder longitudinal axis (CH).