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:
Jan. 31, 2006
Filed:
Aug. 13, 2003
Hiroshi Yamamoto, Kanagawa-ken, JP;
Daijiro Ito, Kanagawa-ken, JP;
Takeshi Nishide, Kanagawa-ken, JP;
Hiroshi Yamamoto, Kanagawa-ken, JP;
Daijiro Ito, Kanagawa-ken, JP;
Takeshi Nishide, Kanagawa-ken, JP;
Komatsu Limited, Tokyo, JP;
Abstract
A bush is provided at its sliding surface with oil-supply groove portions. An area ratio of the oil-supply groove portions to the sliding surface of the journal shaft is set to 30 to 90%. A length Lbetween the oil-supply groove portions in a circumferential direction and an inner diameter D of the bearing satisfy L<πD/36. Even in a bearing device in which the journal shaft and the bush mutually rotate in a predetermined angle range or in which the journal shaft and the bush relatively and continuously rotate, the present invention can effectively be used while maintaining the existing sizes of the journal shaft and the bush, and it is possible to prevent partial break of oil film or shortage of oil film.