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. 20, 2010
Filed:
Apr. 04, 2008
Terunori Koyama, Sagamiwara, JP;
Terunori Koyama, Sagamiwara, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A lens barrel is provided. The lens barrel includes a first cylinder that includes at least one continuous groove on an interior surface thereof. The at least one continuous groove includes a trough of a helicoidal screw and a circumferential groove formed in a circumferential direction with respect to the first cylinder and formed in continuation with the trough of the helicoidal screw. The lens barrel also includes a second cylinder that includes a crest of a helicoidal screw that engages with the trough of the helicoidal screw and the circumferential groove and that is formed on outer circumference of the second cylinder. The crest of the helicoidal screw is formed of first material. A part of the crest of the helicoidal screw includes a reinforcement structure formed of a second material that is a different material from the first material.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile