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:
Sep. 21, 2004
Filed:
Mar. 26, 2003
Noboru Akami, Chigasaki, JP;
Takao Goto, Tokyo-to, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A lens barrel comprises a first cylindrical member having an inner peripheral surface, and a second cylindrical member internally fitted to the first cylindrical member and having an outer peripheral surface. One of the peripheral surfaces has first and second helical parallel axial grooves, and a third groove extending in only a circumferential direction continuously from one side ends of the first and second grooves. The other peripheral surface has first and second protruded portions engaging respectively with the first and second grooves in alignment in the circumferential direction and enabling relative rotations between the cylindrical members and relative movements in the axial direction. When the third groove is reached, the cylindrical members are allowed to make only relative rotations without moving in the axial direction.