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. 07, 2006
Filed:
Dec. 09, 2003
Yusuke Okazaki, Ibaraki, JP;
Nobutaka Ota, Wake-gun, JP;
Toshiyuki Namura, Tatsuno, JP;
Akio Kitada, Hirakata, JP;
Tadashi Shimizu, Hamura, JP;
Yusuke Okazaki, Ibaraki, JP;
Nobutaka Ota, Wake-gun, JP;
Toshiyuki Namura, Tatsuno, JP;
Akio Kitada, Hirakata, JP;
Tadashi Shimizu, Hamura, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
An object of the present invention is to provide, without increasing the costs or decreasing the quantity of light, a fluorescent lamp that is less likely to have the bridge and the constituent tubes damaged while being handled and has improved handleability, as well as to provide a manufacturing method therefor. It is arranged so that the distance between the first and second constituent tubes gradually becomes smaller from the base side of the lamp toward the turning portion side of the lamp where the discharge paths turn. It is arranged so that the value of DDis within a range of 0.05 to 0.70 inclusive, where Dis the distance between the first and second constituent tubes being measured at the bridge connecting points on the base side, and Dis the shortest distance between the first and second constituent tubes on the turning portion side.