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. 19, 2005
Filed:
Oct. 17, 2003
Tatsuomi Nakayama, Kanagawa, JP;
Minoru Ota, Kanagawa, JP;
Minoru Numakura, Kanagawa, JP;
Mamoru Saito, Kanagawa, JP;
Hidenori Watanabe, Yokohama, JP;
Tatsuomi Nakayama, Kanagawa, JP;
Minoru Ota, Kanagawa, JP;
Minoru Numakura, Kanagawa, JP;
Mamoru Saito, Kanagawa, JP;
Hidenori Watanabe, Yokohama, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A method of forming a traction drive rolling element including: forming a preform having a working surface with an arcuate profile in section taken along a central axis; supporting the preform to be rotatable about the central axis; allowing a relative movement between the preform and a grooving tool for moving the grooving tool along the arcuate profile, simultaneously with rotating the preform about the central axis, to form microscopic recesses and projections alternately arranged in a direction perpendicular to the central axis along the arcuate profile; pressing a grindstone having a contact surface area of 25 mmor less, on the working surface; and allowing a relative movement between the preform and the grindstone for moving the grindstone along the arcuate profile simultaneously with rotating the preform while keeping pressing the grindstone on the working surface until a height of the microscopic projections becomes 3 μm or less.