Patent application number | Description | Published |
20090129710 | FLUID DYNAMIC BEARING DEVICE - The present invention aims to achieve a reduction in cost for a fluid dynamic bearing device. The fluid dynamic bearing device supports a shaft member ( | 05-21-2009 |
20090142010 | SINTERED METAL MATERIAL, SINTERED OIL-IMPREGNATED BEARING FORMED OF THE METAL MATERIAL, AND FLUID LUBRICATION BEARING DEVICE - Provided are a sintered metal material improved in sliding property and wear resistance with respect to an associated sliding member to be supported, and a sintered oil-impregnated bearing formed of this metal material. A bearing sleeve is formed by compacting a mixed metal powder composed of not less than 5 wt % and not more than 94.3 wt % of Cu powder, not less than 5 wt % and not more than 94.3 wt % of SUS powder, not less than 0.2 wt % and not more than 10 wt % of Sn powder, and not less than 0.5 wt % and not more than wt % of graphite, and then performing sintering on a compact of the mixed metal powder. | 06-04-2009 |
20120170880 | FLUID DYNAMIC BEARING DEVICE - A density of a bearing sleeve made of a sintered metal is set within a range of from 80% to 95% with respect to a true density, and a Young's modulus of the bearing sleeve is set to be equal to or more than 70 GPa. When the density of the bearing sleeve is increased and also the Young's modulus thereof is set to be equal to or more than 70 GPa in this manner, dimensional variation of an inner peripheral surface of the bearing sleeve can be suppressed to be equal to or less than 0.5 μm when a shaft member having an outer diameter of from 2 mm to 4 mm is to be supported. | 07-05-2012 |
20130071054 | BEARING MEMBER AND FLUID DYNAMIC BEARING DEVICE USING SAME - When a bearing member (bearing sleeve ( | 03-21-2013 |
20130182979 | SINTERED BEARING - With use of a fine copper-based powder, specifically a copper-based powder that contains particles each having a diameter of 45 μm or less by 80 weight % or more, an air permeability can be significantly reduced. When this copper-based powder is used, a sintered metal can be easily formed to contain copper by 40% or less (contain iron by 60% or more) to enhance abrasion resistance, and to have an oil permeability of 1.00 g/10 min or less to increase an oil film formation rate. | 07-18-2013 |
Patent application number | Description | Published |
20080205221 | DATA RECORDING EVALUATION METHOD AND OPTICAL DISK RECORDING AND REPRODUCTION DEVICE - Novel evaluation indexes are introduced to allow both a total evaluation of data recording and an evaluation of individual detection patterns. A data recording evaluation method includes a step of reproducing a result of data recording performed on an optical disk and identifying a predetermined detection pattern in a reproduction signal, a step of detecting a signal state of the reproduction signal associated with the predetermined detection pattern, and a first calculation step for calculating a first evaluation index value based on the detected signal state and a reference state identified from the predetermined detection pattern. When there is a plurality of predetermined detection patterns as described above, a second calculation step is further provided for calculating a second recording state evaluation index value using the first evaluation index value calculated from each of the predetermined detection patterns. Data recording can be properly evaluated using the first and second recording state evaluation index values. | 08-28-2008 |
20080212453 | OPTICAL INFORMATION RECORDING DEVICE, OPTICAL INFORMATION RECORDING METHOD, AND OPTICAL INFORMATION RECORDING MEDIUM - Provided are an optical information recording device, an optical information recording method, and an optical information recording medium which provide an appropriate recording characteristic even when a disturbance occurs during information recording. A drive forms record marks and spaces by irradiating blue-purple laser light to an optical disk, for which an organic dye exhibiting a predetermined absorption factor with respect to light having a wavelength of at or near 405 nm is used, and thus records information. For recording of information, the power of the blue-purple laser light is controlled using writing power used for forming record marks, space formation power used for forming spaces that may be higher than read power used for reproducing information recorded in an optical information recording medium, and bias power higher than read power. | 09-04-2008 |
20080273432 | PROCESSING METHOD OF OPTICAL DISC RECORDING/PLAYBACK SIGNAL, OPTICAL DISC RECORDING/PLAYBACK DEVICE AND PROGRAM - A processing method of an optical disc recording/playback signal includes: measuring a length of a first mark of a predetermined coding length which appears immediately following a shortest space recorded on the optical disc; measuring a length of a second mark which appears immediately following a longest space recorded on the optical disc and which has the same coding length as the first mark; and calculating a heat interference amount based on a difference of the measured length of the first mark and the measured length of the second mark. The method may further include specifying a laser power at a time of forming a space or a cooling pulse width, according to the heat interference amount. | 11-06-2008 |
20090067306 | OPTICAL DISC RECORDING METHOD, OPTICAL DISC RECORDING/PLAYBACK DEVICE, AND OPTICAL DISC - An optical disc recording method includes: determining that an optical disc to be recorded is an optical disc including a recording layer comprising organic dye; and controlling a laser such that space formation power Ps necessary for space formation is equal to or smaller than bias power Pbw. In a case wherein the relation of Ps03-12-2009 | |
20110188360 | RECORDING METHOD FOR OPTICAL DISK AND OPTICAL DISK RECORDING REPRODUCTION DEVICE - There is proposed an optical disk recording method that can prevent degradation of recording quality due to occurrence of thermal interference, and an optical disk recording reproduction device used in this recording method. The recording method has a step of executing a test record on an output proofing area of the optical disk | 08-04-2011 |