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:
May. 02, 1989
Filed:
Sep. 18, 1986
Applicant:
Inventors:
Takashi Arai, Tokyo, JP;
Katsuo Kawano, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
425542 ; 2643288 ; 264D / ; 350254 ; 350255 ; 350505 ; 354286 ; 354288 ; 425586 ; 428412 ;
Abstract
A lens barrel member in which an equally divided helicoid portion is provided on the inner periphery or the outer periphery of a cylinder member forming a lens barrel, and an engaging portion engaged with another lens barrel component is provided at the end of the outer periphery of the cylinder member coaxially with the helicoid portion, the cylinder member being of a sandwich-molded structure comprising a core layer and a skin layer. Also disclosed is a method of molding such lens barrel member.