Patent application number | Description | Published |
20080196995 | Grease Composition, Grease-Enclosed Bearing, and Rotation-Transmitting Apparatus With Built-In One Way Clutch - The present invention provides a grease composition capable of effectively preventing a rolling surface of a bearing from having hydrogen brittleness-caused peeling, a grease-enclosed bearing in which the grease composition is enclosed, and a rotation-transmitting apparatus with a built-in one-way clutch in which the grease composition is enclosed at a sliding portion. The grease composition contains a base grease consisting of a base oil and a thickener; and an additive added to the base grease. The grease composition prevents a frictional wear surface of the sliding portion or a newly generated surface consisting of iron or the like exposed owing to wear from being peeled owing to hydrogen brittleness. The additive contains a bismuth-based additive or a magnesium-based additive. The bismuth-based additive consists of at least one of inorganic bismuth and organic bismuth not containing a sulfur component. The magnesium-based additive consists of at least one of inorganic magnesium and organic magnesium. The grease-enclosed bearing encloses the above-described grease composition. | 08-21-2008 |
20090005272 | Grease Composition, Grease-Enclosed Bearing, and One-Way Clutch - The present invention provides a grease composition capable of effectively preventing a rolling surface from having hydrogen brittleness-caused peeling, a grease-enclosed bearing in which the grease composition is enclosed, and a one-way clutch in which the grease composition is enclosed at a sliding portion. The grease composition contains a base grease consisting of a base oil and a thickener and an additive added to the base grease. The grease composition is capable of preventing hydrogen brittleness-caused peeling from occurring on a frictionally worn surface of a bearing portion containing an iron-based metal material or a newly generated surface consisting of the iron-based metal material exposed owing to wear. The additive contains at least one aluminum-based additive selected from among an aluminum powder and inorganic aluminum compounds. The mixing ratio of the aluminum-based additive to 100 parts by weight of the base grease is set to 0.05 to 10 parts by weight. | 01-01-2009 |
20110002568 | CAGE FOR BALL BEARING, BALL BEARING WITH THE CAGE AND METHOD OF MANUFACTURING THE CAGE - A snap cage ( | 01-06-2011 |
20110007990 | GREASE COMPOSITION AND GREASE-SEALED BEARING - The present invention provides a grease composition ( | 01-13-2011 |
20110136578 | GREASE COMPOSITION AND GREASE COMPOSITION-ENCLOSED ROLLING BEARING AND UNIVERSAL JOINT - It is an object of the present invention to provide a grease composition ( | 06-09-2011 |
20120277132 | LUBRICANT COMPOSITION AND BEARING USING SAME - A lubricant composition capable of effectively preventing a rolling surface of a bearing from flaking owing to hydrogen embrittlement. The bearing is lubricated with the lubricant composition. The lubricant composition is lubricating oil or grease. The lubricant composition contains a molybdate. The lubricant composition also contains an organic acid salt. At least one molybdate is selected from sodium molybdate, potassium molybdate, and lithium molybdate. The organic acid salt is a sodium salt of an organic acid having one to 20 carbon atoms. 0.01 to 5 wt % of the molybdate is added to the entirety of the lubricant composition. 5 wt % to 70 wt % of the organic acid salt is added to the addition amount of the molybdate. The lubricant composition forms a film containing a molybdenum compound in addition to an iron oxide film on a worn surface of the bearing. | 11-01-2012 |
20120316091 | THICKENER, GREASE, METHOD FOR PRODUCING THE SAME,AND GREASE-PACKED BEARING - The present invention provides a thickener which allows grease having an excellent durability in a high-temperature and high-speed condition to be produced, the grease containing the thickener, a method of producing the thickener and the grease, and a grease-packed bearing. A grease ( | 12-13-2012 |
20130276563 | GREASE COMPOSITION, GREASE-PACKED BEARING, UNIVERSAL JOINT AND LINEAR MOTION DEVICE - The present invention provides a grease composition which contains a small amount (not more than 0.06 wt %) of molybdenum and yet is capable of achieving an excellent low friction property when mechanical parts in which the grease composition has been packed are operated under a severe sliding condition in which they are subjected to a high speed and a high contact pressure. The present invention also provides a bearing, a universal joint, and a linear motion device in which the grease composition of the present invention is packed. A grease composition ( | 10-24-2013 |