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:
Jan. 22, 2002
Filed:
Mar. 11, 1999
Ritsuo Koga, Tokyo, JP;
Hideto Kubouchi, Tokyo, JP;
Plus Corporation, Tokyo, JP;
Abstract
A lamp cartridge according to the present invention includes a lamp as a light source; a reflecting mirror for converging the light emitted from the lamp; and several side surfaces forming a case for covering the lamp, the reflecting mirror and for supporting the reflecting mirror. In the present invention, one of the surfaces forming the case where light is emitted out of the lamp cartridge and away from the reflecting mirror is provided with a hole having a diameter smaller than that of the end of the reflecting mirror. In addition, an optical axis of the hole is directly aligned with an optical axis of the end of the reflecting mirror where light is emitted out of the lamp cartridge. Further, a fan is provided on one of the side surfaces forming the lamp cartridge case. Outside air is introduced through the hole and into the interior of the lamp cartridge whereby heat generated by the lamp and the reflecting mirror is exhausted by the fan.