Title:
GREASE COMPOSITION, GREASE-PACKED BEARING, UNIVERSAL JOINT FOR PROPELLER SHAFT, LUBRICATING OIL COMPOSITION, AND OIL-IMPREGNATED SINTERED BEARING
Document Type and Number:
WIPO Patent Application WO/2010/098337
Kind Code:
A1
Abstract:
A grease composition or lubricating oil composition which can effectively prevent the rolling surfaces of a rolling bearing or the like from suffering hydrogen embrittlement and resultant flaking, has excellent high-temperature high-speed durability, and can be used for long. Provided is a grease-packed bearing (1) which is equipped with an inner ring (2), an outer ring (3), and a plurality of rolling elements (4) and in which sealing members (6) for enclosing a grease composition (7) around the rolling elements have been disposed in both shaft-direction edge openings (8a, 8b) between the inner ring (2) and the outer ring (3). The grease composition (7) comprises a base grease comprising a base oil and a thixotropic agent and an additive incorporated in the base grease, the additive comprising at least one compound selected from plant-derived polyphenol compounds and products of decomposition thereof, the compounds being tannin, gallic acid, ellagic acid, chlorogenic acid, caffeic acid, curcumin, quercetin, quinic acid, etc.
Inventors:
MIKAMI HIDENOBU
TAGUCHI YOSUKE
KAWAMURA TAKAYUKI
TAGUCHI YOSUKE
KAWAMURA TAKAYUKI
Application Number:
PCT/JP2010/052822
Publication Date:
September 02, 2010
Filing Date:
February 24, 2010
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD (JP)
MIKAMI HIDENOBU
TAGUCHI YOSUKE
KAWAMURA TAKAYUKI
MIKAMI HIDENOBU
TAGUCHI YOSUKE
KAWAMURA TAKAYUKI
International Classes:
C10M169/04; C10M101/02; C10M105/18; C10M105/32; C10M105/68; C10M105/70; C10M107/02; C10M107/38; C10M115/08; C10M117/00; C10M129/24; C10M129/46; C10M129/54; C10M129/76; C10M159/02; C10N20/02; C10N30/00; C10N30/10; C10N40/02; C10N50/10; F16C19/06; F16C33/66
Domestic Patent References:
| WO2004018595A1 | 2004-03-04 | |||
| WO2006109652A1 | 2006-10-19 |
Foreign References:
| JP2008297447A | 2008-12-11 | |||
| JP2007270127A | 2007-10-18 | |||
| JP2008138138A | 2008-06-19 | |||
| JP2005097513A | 2005-04-14 | |||
| JP2004339270A | 2004-12-02 | |||
| JP2006283830A | 2006-10-19 | |||
| JP2001193751A | 2001-07-17 |
Attorney, Agent or Firm:
WAKI, MISAO (JP)
Wake 操 (JP)
Wake 操 (JP)
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