Hiroaki Saito
Hiroaki Saito, Ehime-Ken JP
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20080304776 | HYDRODYNAMIC BEARING DEVICE AND DISK ROTATING APPARATUS - In a hydrodynamic bearing device in which a radial bearing face having a dynamic pressure generating groove on a shaft or an inner periphery of a sleeve is provided and a clearance between the shaft and the sleeve is filled with lubricant, an annular depression is provided on one end face of the sleeve adjacent to a rotor hub and a cover plate for covering the depression is attached to the sleeve so as to define a reservoir for the lubricant or air for the purpose of preventing such a risk that absence of an oil film occurs in clearances of a bearing of the hydrodynamic bearing device due to outflow of oil upon forcing of the oil by air received into the bearing. A step portion is provided on the other end face of the sleeve such that the step portion and the reservoir are communicated with each other by a communication hole. During operation of the hydrodynamic bearing device, air in the hydrodynamic bearing device reaches the reservoir via the communication hole so as to be discharged from the reservoir. | 12-11-2008 |
20100085661 | HYDRODYNAMIC BEARING DEVICE AND DISK ROTATION APPARATUS - In a hydrodynamic bearing device in which a radial bearing face having a dynamic pressure generating groove on a shaft or an inner periphery of a sleeve is provided and a clearance between the shaft and the sleeve is filled with lubricant, an annular depression is provided on one end face of the sleeve adjacent to a rotor hub and a cover plate for covering the depression is attached to the sleeve so as to define a reservoir for the lubricant or air for the purpose of preventing such a risk that absence of an oil film occurs in clearances of a bearing of the hydrodynamic bearing device due to outflow of oil upon forcing of the oil by air received into the bearing. A step portion is provided on the other end face of the sleeve such that the step portion and the reservoir are communicated with each other by a communication hole. During operation of the hydrodynamic bearing device, air in the hydrodynamic bearing device reaches the reservoir via the communication hole so as to be discharged from the reservoir. | 04-08-2010 |
Hiroaki Saito, Sagamihara-Shi JP
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20090229970 | SPUTTERING CATHODE, SPUTTERING APPARATUS PROVIDED WITH SPUTTERING CATHODE, FILM-FORMING METHOD, AND METHOD FOR MANUFACTURING ELECTRONIC DEVICE - The present invention provides a sputtering cathode whereby it is possible to increase the degree of freedom to adjust a distance between a target and a magnet unit. A sputtering cathode in accordance with one embodiment of the present invention includes a plurality of magnet units arranged at positions opposite to the rear surface of the target and a distance adjusting mechanism for separately adjusting a distance between the target and a magnet unit for each magnet unit. In addition, the sputtering cathode includes a reciprocating movement mechanism for reciprocating a plurality of magnet units in parallel to the rear surface of the target. The plurality of magnet units, the distance adjusting mechanism and the reciprocating movement mechanism may be housed in a magnet chamber that can be evacuated. | 09-17-2009 |
Hiroaki Saito, Ehime JP
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20080212907 | HYDRODYNAMIC BEARING, AND HYDRODYNAMIC BEARING-TYPE ROTARY DEVICE AND RECORDING AND REPRODUCING APPARATUS EQUIPPED WITH SAME - The angular stiffness of a bearing is kept high, and at the same time air inside the bearing is discharged smoothly, without accumulating, which prevents oil film separation on the bearing. With the present invention, a communicating hole is provided, the hole and a radial hydrodynamic groove constitute a circulation path for a lubricant, there is a first thrust bearing face in contact with the circulation path, there is a first hydrodynamic groove on the face, this groove is a herringbone groove with a pump-in pattern, and no low-pressure part is generated in the thrust bearing, so even if the bearing undergoes a pressure change, there is no risk that the air accumulated in a low-pressure part will expand and cause oil film separation on the bearing face. Also, the bubbles are smoothly discharged by circulation of the lubricant in the asymmetrical radial hydrodynamic groove, and there is a pressure distribution such that the pressure generated at the face during bearing rotation is sufficiently high at the outer peripheral portion of the groove pattern, and angular stiffness is high. | 09-04-2008 |
20080304775 | HYDRODYNAMIC BEARING DEVICE, AND RECORDING AND REPRODUCING APPARATUS EQUIPPED WITH SAME - There is provided a hydrodynamic bearing device that maintains high bearing angular stiffness, and that prevents oil film separation in the bearing by smoothly discharging any bubbles present inside the bearing. With a hydrodynamic bearing device, a communicating hole and a radial hydrodynamic groove constitute a circulation path for a lubricant, and a first thrust bearing surface is provided at a location in contact with the circulation path. A first hydrodynamic groove formed in the first thrust bearing surface is a spiral groove with a pump-in pattern. Any bubbles in the bearing are smoothly discharged by the circulation of the lubricant produced by the asymmetrical radial hydrodynamic groove. The pressure generated at the thrust bearing surface during rotation of the bearing has a distribution such that there is a wide range of high pressure. | 12-11-2008 |
20090028474 | HYDRODYNAMIC BEARING DEVICE, AND SPINDLE MOTOR EQUIPPED WITH SAME - There is provided a hydrodynamic bearing device with which the lubricant is prevented from leaking to the outside, and good seal performance can be maintained, and a spindle motor equipped with this hydrodynamic bearing device. The hydrodynamic bearing device comprises a shaft, a sleeve, a lubricant that fills a microscopic gap, a radial bearing portion, a thrust beating portion, and a bearing seal portion. The value of a function P | 01-29-2009 |
20090154852 | HYDRODYNAMIC BEARING DEVICE, SPINDLE MOTOR, AND INFORMATION RECORDING AND REPRODUCING APPARATUS - The hydrodynamic bearing device comprises a sleeve | 06-18-2009 |
Hiroaki Saito, Tokyo JP
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20090048445 | Method of Synthesizing Quinoxaline Derivative by Microwave Irradiation - There is disclosed a method of synthesizing a quinoxaline derivative in which toxicity, corrosiveness and permeation are low and which is excellent in safety and which attains a reduced reaction time, a greatly improved yield and excellent economical efficiency. The object is achieved by a method of synthesizing a quinoxaline derivative which comprises adsorbing a benzofuroxan derivative and a β-diketone derivative on a solid support, and then heating the derivatives in a solid state by microwave irradiation to dehydrocyclize them. | 02-19-2009 |
20090107445 | Recoil Starter - According to an aspect of the present invention, there is provided a recoil starter including: a base plate that has a bearing portion formed therein; a rotary shaft that is supported by the bearing portion so as to pass through the base plate; a rope reel that is rotatably supported at one side of the base plate; a recoil rope that is wound around the rope reel; a recoil spiral spring that urges the rope reel to rewind the recoil rope; a damper spring that has one end connected to the rotary shaft and the other end connected to the rope reel; and a clutch mechanism that is disposed on an end of the rotary shaft at the other side of the base plate and that transfer a rotational force to an engine. | 04-30-2009 |
Hiroaki Saito, Gunma JP
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20110119857 | METHOD OF MANUFACTURING BLADE RUBBER AND WIPER BLADE - A blade rubber having both of superior durability and wiping performance can be manufactured by using a non-diene-based rubber without environmental burden. A pair of blade-rubber molded bodies molded from the non-diene-based rubber is subjected to an irradiation treatment to generate radical active sites, and monomers are bound by graft polymerization as beginning at the radical active sites. Also, the monomers are adhered on a surface of the blade rubber either before or after the generation of the radical active sites. The irradiation treatment and the graft polymerization may be simultaneously performed or independently performed in this order. In this manner, a surface treatment for reducing friction of the non-diene-based rubber having superior durability can be performed without halogen, and therefore, a blade rubber having superior durability and wiping performance can be manufactured. | 05-26-2011 |
Hiroaki Saito, Yachiyo-Shi JP
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20140200253 | INDIRUBIN DERIVATIVE HAVING HIGHLY SELECTIVE CYTOTOXICITY FOR MALIGNANT TUMORS - An agent for treating malignant tumors based on a new mechanism is provided, which comprises an indirubin derivative represented by formula (1) or a salt thereof: | 07-17-2014 |
Hiroaki Saito, Nagoya-Shi JP
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20160006260 | POWER TRANSMISSION DEVICE AND POWER RECEPTION DEVICE - A foreign object detector includes a plurality of first coils and a plurality of second coils. The plurality of first coils are arranged along an upper surface of a power transmission coil. The plurality of second coils are provided to correspond to the plurality of first coils, with the second coils each being arranged to face a corresponding one of the first coils. An outer shape of each of the plurality of first coils and each of the plurality of second coils is smaller than an outer shape of the power transmission coil when the power transmission coil is viewed two-dimensionally from above the power transmission coil. | 01-07-2016 |