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:
Mar. 27, 1984
Filed:
Oct. 02, 1981
Takeshi Muryoi, Chigasaki, JP;
Nippon Kogaku K.K., Tokyo, JP;
Abstract
A zoom lens barrel includes an optical system including a forward group lens and a rearward group lens, the forward group lens comprising a first lens group and a second lens group, and means for driving the forward group lens in the direction of the optical axis for focusing. The driving means includes an operating member, a first holding member holding the first lens group and movable in the direction of the optical axis in response to the operating member, a second holding member holding the second lens group and movable in the direction of the optical axis, and means responsive to movement of the first holding member to move the second holding member while varying the spacing between the first lens group and the second lens group.