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:
Dec. 10, 2002
Filed:
Dec. 09, 1999
Takaaki Hayashida, Nagoya, JP;
Masato Uneme, Nagoya, JP;
Chuo Hatsujo Kabushiki Kaisha, Nagoya, JP;
Abstract
In a frictional hinge device, a metallic shaft has an axis as a rotational center. A support block is molded in synthetic resin (PC, PAR, PPS or the like) around the metallic shaft so that the support block is relatively rotatable with respect to the metallic shaft .The support block is held at any angular position by a surface friction resistance between the support block and the metallic shaft . In addition, an outer surface of the metallic shaft is processed with a surface treatment to attain a surface roughness (Ra) ranging from 0.15 to 0.35 m. This ensures a stable surface frictional resistance between the support block and the metallic shaft with minimum scratch and stickslip.