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, 2012
Filed:
May. 10, 2007
Hiroshi Yamamoto, Kawasaki, JP;
Motohide Sugihara, Hiratsuka, JP;
Atsushi Nagato, Hiratsuka, JP;
Komatsu Ltd., Tokyo, JP;
Abstract
In a bush () which relatively-rotatably supports a journal shaft () around its central axis by housing the journal shaft () in a formed bearing hole (), the bushincludes an oil supply groove () formed spirally to supply lube oil to an inner surface of the bearing hole () which contacts to the journal shaft () when the journal shaft relatively rotates. A ratio of an area of the oil supply groove () to the inner surface area of the bearing hole () is equal to or less than 30%. A product of a distance in the central axis direction and a distance in the circumferential direction of the journal shaft () between the oil supply groove () in next to each other on the inner surface of the bearing hole () is within 50 to 300 mmrange.