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. 13, 2009
Filed:
May. 04, 2005
Yoshikazu Nakamura, Chiba, JP;
Kosei Kosako, Tokyo, JP;
Yoshikazu Nakamura, Chiba, JP;
Kosei Kosako, Tokyo, JP;
Hoya Corporation, Tokyo, JP;
Abstract
A pivot shaft mechanism includes a rotation support cylinder; an inner shaft provided in the rotation support cylinder to be relatively rotatable; an annular space formed between an inner peripheral surface of the rotation support cylinder and an outer peripheral surface of the inner shaft; engaging recesses formed on the outer peripheral surface of the inner shaft; and a resilient ring member which includes an arc-shaped arm portion which is formed as a partial annular ring, and a pair of bent end portions. The resilient ring member is installed between the rotation support cylinder and the inner shaft with the arc-shaped arm portion installed in the annular space in a resiliently deformed state and the pair of bent end portions installed in the engaging recesses in a resiliently deformed state to apply a frictional resistance between the rotation support cylinder and the inner shaft.