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:
Nov. 19, 2013
Filed:
Sep. 13, 2010
Applicant:
Joong-wan Park, Gyeonggi-do, KR;
Inventor:
Joong-Wan Park, Gyeonggi-do, KR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 7/02 (2006.01); G02B 21/00 (2006.01); G02B 9/00 (2006.01); G03B 13/00 (2006.01); G03B 13/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
A focusing device for a beam projector including a casing, a body tube having at least one lens, the body tube being advanced or retracted in a direction of an optical axis in the casing, a movable member provided at a side of the body tube, the movable member moving in parallel with the direction of the optical axis, a bridge fixed to the body tube and coupled with the movable member to cover at least a part of the movable member, and a drive motor fixed in the casing and provided at a side of the body tube, in which the movable member linearly reciprocates as the drive motor operates, whereby the body tube is advanced or retracted.