The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 18, 2006
Filed:
Mar. 04, 2004
Yasuhisa Terada, Kanagawa, JP;
Kenji Takei, Kanagawa, JP;
Michiharu Naka, Kanagawa, JP;
NSK Ltd., Tokyo, JP;
Abstract
A rolling bearing lubricated with a grease includes an outer ring, an inner ring, a plurality of rolling elements disposed between respective rolling raceway tracks of the outer ring and the inner ring, and a retainer having a plurality of pockets for locking the rolling elements to freely roll and formed of resin material. In the rolling bearing, the radial clearance gap ratio of the pockets of the retainer is set to 0≦δr/Da≦0.09, and the axial clearance gap ratio of the pockets is set to 0≦δa/Da≦0.06 when the kinematic viscosity of base oil at 40° C. of the grease is 10 to 40 mm/sec, being set to 0≦δa/Da≦0.05 when the kinematic viscosity of base oil is 10 to 90 mm/sec, being set to 0≦δa/Da≦0.025 when the kinematic viscosity of base oil is 10 to 160 mm/sec.