Patent application number | Description | Published |
20080309183 | Dynamic Bearing Device - Disclosed is a dynamic bearing device which allows production of a smaller housing at low cost and which suppresses ion elution from the resin portion to thereby maintain cleanliness in the dynamic bearing device and exert a desired bearing performance. A dynamic bearing device | 12-18-2008 |
20090054276 | Porous Solid Lubricant, Bearing and Constant-Velocity Joint - A porous solid lubricant includes a lubricating component, and a resin component. The lubricating component is a solid material made porous by foaming, and is occluded in the resin. A bearing or a constant-velocity joint has the above porous solid lubricant sealed therein. Since the lubricating component is occluded in the resin while foaming the resin component, the lubricating component can be slowly exuded through molecules of the resin due to deformation of the flexible resin under external force such as compression, expansion, bending and twisting. The amount of lubricating oil retained is larger than the amount of oil retained in pores by mere impregnation. Thus, such a bearing which has a long life, can be operated at a high speed, and can be manufactured at a low cost. Also, such a constant-velocity joint has a long life and has a rubber boot less likely to be damaged. | 02-26-2009 |
20090074339 | Resin-Made Cage and Bearing - It is an object of the present invention to provide a cage that can be used in a cryogenic-temperature environment or a vacuum without providing the cage with a complicated construction and without performing special treatment and a bearing using the cage. A cage made of resin has an annular main body having a plurality of pocket portions radially penetrating the main body; and a plurality of pocket members, provided on the annular main body, which hold rolling elements of a rolling bearing. The main body is a molding of a first resin composition consisting of a first resin and a solid lubricant mixed therewith; and at least a rolling element-retaining surface of each of the pocket members is made of a second resin composition containing fluorocarbon resin as a main component thereof. The molding of the first resin composition has a tensile strength of not less than 30 MPa and a heat-resistant temperature of not less than 200° C. The second resin composition is a fluorocarbon resin composition. The rolling bearing is constructed of an inner ring, an outer ring, the rolling elements interposed between the inner ring and the outer ring, and the cage. The rolling bearing is used for a turbopump, of a rocket engine, which uses a liquid fuel. | 03-19-2009 |
20090129716 | Heat-Resistant, Oil Resistant Rolling Bearing and Rolling Bearing for Use in a Compressor of a Refrigerating Machine - An object is to provide a heat-resistant, oil-resistant rolling bearing which prevents release of low molecular weight polymers, additives and colorants that remain in trace amounts in the resin retainer from the resin body, thereby preventing deterioration of lubricating oil, and particularly a rolling bearing for use in a compressor of a refrigerating machine which prevents deterioration of refrigerating machine oil and which does not impair the function of capillary tubes of the refrigerating cycle. | 05-21-2009 |
20090136170 | Water-Resistant Grease and Water-Resistant-Grease-Enclosed Rolling Bearing and Hub - The present invention provides water-resistant grease which improves the resistance to peeling which occurs from the surface of a bearing composed of carbon steel for machine structural use or the like even in a strict lubricating condition in which water may penetrate into the water-resistant grease during the operation of the bearing, and a rolling bearing and a hub bearing which use the water-resistant grease and have a long life. The water-resistant grease is composed of non-water-based base oil, a thickener, and a water dispersant used as an additive. The saturated amount of water dispersible in the water-resistant grease is 30 to 60 wt %. The water dispersant capable of dispersing the water in the water-resistant grease is a surface active agent. The non-water-based base oil is mineral oil. The thickener is a urea-based compound. The present invention also provides a rolling bearing and a hub bearing in which the water-resistant grease is enclosed. | 05-28-2009 |
20090136172 | Grease for Hub Bearing and Hub Bearing - The present invention provides a hub bearing, made of carbon steel for machine structural use, which has a long life even in a strict lubricating condition by improving the resistance to peeling starting from the surface. A grease for the hub bearing contains a base oil, a thickener, and an organozinc compound which is at least one compound selected from dithiozinc carbamate and dithiozinc phosphate. The base oil is a mineral oil or a mixed oil of a mineral oil and a synthetic hydrocarbon oil. The thickener is a urea compound shown by the following formula (1) and is contained at 1 to 40 mass % for the entire grease. The grease for the hub bearing is enclosed in the hub bearing. | 05-28-2009 |
20090206708 | FLUID DYNAMIC BEARING APPARATUS AND MOTOR COMPRISING THE SAME - A fluid dynamic bearing apparatus with an increased adhesive strength between a component having an adhesion fixing face and a bracket is provided by appropriately controlling the adhesion gap. | 08-20-2009 |
20090208157 | Grease for hub bearing and hub bearing - The present invention provides a hub bearing, made of carbon steel for machine structural use, which has a long life even in a strict lubricating condition by improving the resistance to peeling starting from the surface. A grease for the hub bearing contains a base oil and a thickener, and in the base oil, the number of naphthenic carbons found by an n-d-M ring analyzing method accounts for 32 to 37% of a whole number of carbon atoms in the base oil. The base oil is a mineral oil or a mixed oil of a mineral oil and a synthetic hydrocarbon oil. The thickener is a urea compound shown by the following formula (1) and is contained at 1 to 40 mass % for the entire grease. The grease for the hub bearing is enclosed in the hub bearing. | 08-20-2009 |
20090232432 | Lubricating grease and lubricating grease-enclosed roller bearing - The present invention provides lubricating grease which is excellent in durability at a high temperature, restrains a reaction from occurring between fluorine and steel, and has a long life; and a rolling bearing in which the lubricating grease is enclosed. The lubricating grease contains perfluoropolyether oil as a base oil thereof and fluorocarbon resin powder as a thickener thereof. The lubricating grease further contains an additive containing a substance capable of forming a film on a metal surface. The substance is a diurea compound having an —NH— bond in a molecular structure thereof, an organic-acid metal salt such as sodium sebacate, molybdate such as potassium molybdate or sodium molybdate, or a bismuth-containing compound such as bismuth sulfate. The rolling bearing has an inner ring and an outer ring disposed concentrically with each other, a plurality of rolling elements interposed between the inner ring and the outer ring, and a retainer dividedly holding the rolling elements. The lubricating grease is enclosed on the periphery of the rolling elements. | 09-17-2009 |
20090243224 | Resin seal ring and manufacturing method - The present invention provides a seal ring which can be prevented from being broken by an expansion and a shock applied thereto when the seal ring is fitted on a rotary shaft and does not have a configurative disadvantage such as a burr. Therefore no post-processing is required. The present invention also provides materials of the seal ring and a method of manufacturing the seal ring. The seal ring is made of resin and having two abutments confronting each other and a gate mark formed in an injection molding operation. | 10-01-2009 |
20090274407 | ROLLING BEARING FOR TENTER CLIP - The present invention provides a rolling bearing, for a tenter clip, which is capable of restraining deterioration of a sealing member even though the sealing member contacts ester oil, and is excellent in reliability and durability at high temperatures. A periphery of an outer ring of the rolling bearing for use in the tenter clip of a film-stretching apparatus is lubricated with the ester oil. In the sealing member which covers openings disposed at both axial ends of an inner ring and the outer ring of the rolling bearing, at least a portion of the sealing member which contacts the ester oil is made of (A) a fluororubber molding of a vulcanizable fluororubber composition which comprises a copolymer containing tetrafluoroethylene (TFE), propylene, and a to-be-crosslinked monomer consisting of unsaturated hydrocarbon, having two to four carbon atoms, in which a part of hydrogen atoms is substituted with fluorine atoms or (B) a fluororubber molding of at least one fluororubber composition selected from a vulcanizable fluororubber composition containing a TFE-propylene binary copolymer and a vulcanizable fluororubber composition containing a vinylidene fluoride-TFE-propylene ternary copolymer. | 11-05-2009 |
20090297076 | FLUID DYNAMIC BEARING DEVICE - A hub portion of a fluid dynamic bearing device is formed from a resin composition in which polyphenylene sulfide (PPS) is employed as a base resin and with which carbon fibers are mixed. In this manner, the wear resistance and the conductivity can be improved. Alternatively, both portions of a stationary body and a rotating body of the fluid dynamic bearing device which portions face to each other through a bearing gap are formed from a resin composition in which polyphenylene sulfide (PPS) is employed as the base resin. In this manner, excellent wear resistance can be obtained. | 12-03-2009 |
20100093569 | SLIDING MATERIAL COMPOSITION - The present invention provides a sliding material composition that is capable of continuously supplying a lubricant to the surface of a sliding portion and has a low frictionality and a low wearability. A sliding material composition of the present invention includes a resin material with which at least porous silica and a lubricant are mixed. The ratio of the sum of the mixing amount of the porous silica and that of the lubricant to the whole amount of the sliding material composition is 30 to 60 vol %. The interconnected cell ratio of the oil-containing porous silica in which the lubricant is held by the porous silica is not less than 20% when the interconnected cell ratio is found by a predetermined computing method to be carried out by utilizing the principle of a Monte Carlo method. | 04-15-2010 |
20100129021 | ROLLING BEARING - It is an object of the present invention to provide a rolling bearing in which a film formed on a surface of a retainer is difficult to peel or a metal component is difficult to dissolve even when the rolling bearing is used in environment where the rolling bearing contacts lubricating oil containing sulfur-based additives. A rolling bearing ( | 05-27-2010 |
20100142872 | RESIN COMPOSITION FOR SLIDING MEMBER AND ROLLING BEARING - A resin composition for a sliding member is difficult to peel and whose component is difficult to elute when the resin composition is formed as a film on a surface of a mechanical part, even though the resin composition is used in environment where the sliding member contacts lubricating oil containing a sulfur-based additive or in atmosphere containing a sulfur-based compound. A resin composition for a sliding member to be used for a mechanical part having a surface thereof formed of said sliding member. The resin composition contains polyamide-imide resin having an elongation percentage of 60% to 120%, fullerene, and at least one disulfide selected from among molybdenum disulfide and tungsten disulfide. 0.1 to 10 vol % of the fullerene and 0.5 to 20 vol % of the disulfide are contained in an entirety of the resin composition. | 06-10-2010 |
20100316315 | MEMBER FOR ROLLING BEARING AND ROLLING BEARING - The present invention provides a member for a rolling bearing ( | 12-16-2010 |
20110097028 | Cage for rolling bearing and rolling bearing - The present invention provides a cage, for a rolling bearing, whose surface is silver-plated by using a barrel plating method capable of improving the durability thereof in a sliding test. In the cage, for the rolling bearing, made of an iron metal material and having a precious metal-plated layer formed on a surface thereof, the precious metal-plated layer is formed on a ground plated layer formed on a surface of the iron metal material by using a barrel electroplating method. A surface of the ground plated layer consists of a smooth surface. The precious metal-plated layer is in direct close contact with the smooth surface. The ground plated layer consists of a metal having a higher ionization tendency than the precious metal formed on the surface of the ground plated layer. For example, the precious metal forming the plated layer formed on the surface of the ground plated layer is silver, whereas the ground plated layer is a copper-plated layer. A cavity is not present at an interface between the copper-plated layer and the silver-plated layer. | 04-28-2011 |
20110160384 | INJECTION MOLDED ARTICLE, RESIN-MADE SLIDING BEARING, RESIN-MADE GEAR, RESIN-MADE CROWN-SHAPED CAGE, RESIN-MADE SEAL AND ROLLING - It is an object of the present invention to provide an injection-molded article such as a resin-made cage, a resin-made seal, a resin-made sliding bearing, and a resin-made gear having reliable flowability, enhanced mechanical strength and toughness, and improved wear resistance. A resin composition is composed of a biodegradable polyester polymer particularly polybutylene succinate to which not less than 10 wt % nor more than 40 wt % of a fibrous inorganic reinforcing material and not less than 0.5 wt % nor more than 10 wt % of polycarbodiimide resin are added. The injection-molded article is obtained by injection molding the resin composition. | 06-30-2011 |
20120128281 | RESIN COMPOSITION AND METHOD FOR PRODUCTION THEREOF, AND ROLLING BEARING AND SLIDING BEARING - It is an object of the present invention to provide a resin composition whose flowability is secured when the resin composition is injection-molded into injection-molded articles such as a resin-made crown-shaped cage and a resin-made seal both for a rolling bearing and a resin-made sliding bearing and which is capable of enhancing the mechanical strengths and toughnesses of these injection-molded articles to such an extent that these injection-molded articles can be used as bearing members. The resin composition is formed into a molded article and used as a bearing member. The resin composition is composed of polyamide resin or polyester resin to which polycarbodiimide is added. The polyamide resin is at least one resin selected from among polyamide 66 resin and polyamide 11 resin. The polyester resin is polytrimethylene terephthalate resin. 0.5 to 6 wt % of the polycarbodiimide is contained in an entirety of the resin composition. A resin-made crown-shaped cage ( | 05-24-2012 |
20120178654 | SLIDING MATERIAL COMPOSITION - The present invention provides a sliding material composition that is capable of continuously supplying a lubricant to the surface of a sliding portion and has a low frictionality and a low wearability. A sliding material composition of the present invention includes a resin material with which at least porous silica and a lubricant are mixed. The ratio of the sum of the mixing amount of the porous silica and that of the lubricant to the whole amount of the sliding material composition is 30 to 60 vol %. The interconnected cell ratio of the oil-containing porous silica in which the lubricant is held by the porous silica is not less than 20% when the interconnected cell ratio is found by a predetermined computing method to be carried out by utilizing the principle of a Monte Carlo method. | 07-12-2012 |
20130301965 | MEMBER FOR ROLLING BEARING AND ROLLING BEARING - The present invention provides a member, for a resin-made rolling bearing, which has a low extent of a moisture absorption-caused change in its dimension and mechanical properties, keeps sufficiently high mechanical properties after the member absorbs moisture, and is excellent in its resistance to hydrolysis, grease deterioration, and heat and also provides the rolling bearing in which the member for the rolling bearing is used. A rolling bearing ( | 11-14-2013 |