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:
Oct. 28, 2008
Filed:
Nov. 21, 2003
Ichiro Yamada, Kanagawa-Ken, JP;
Naoyuki Toda, Kanagawa-Ken, JP;
Kiyoshi Nishimura, Kanagawa-Ken, JP;
Yusuke Shibahara, Kanagawa-Ken, JP;
Kiyoshi Ootani, Kanagawa-Ken, JP;
Masahiko Yoshida, Kanagawa-Ken, JP;
Ichiro Yamada, Kanagawa-Ken, JP;
Naoyuki Toda, Kanagawa-Ken, JP;
Kiyoshi Nishimura, Kanagawa-Ken, JP;
Yusuke Shibahara, Kanagawa-Ken, JP;
Kiyoshi Ootani, Kanagawa-Ken, JP;
Masahiko Yoshida, Kanagawa-Ken, JP;
Toshiba Lighting & Technology Corporation, Tokyo, JP;
Abstract
There is provided a multi-ringed bulb including a plurality of ring bulbs in which a plurality of straight tube portions having an outside diameter of from 12 to 20 mm are connected to each other through bent portions on a same plane. Electrodes are provided hermetically at respective ends of outermost and innermost bulbs of the plurality of ring bulbs. A connection portion connects other adjacent ends of the outermost and innermost bulbs to each other so that the outermost and innermost bulbs communicate with each other, to form a single discharge path. A phosphor layer is formed on inner surfaces of at least the straight tube portionsof the inner and outer bulbs. The multi-ringed structure bulb is filled with discharge medium. The above-mentioned structure permits to provide a fluorescent lamp and a lighting apparatus, which have a small strain in the inner and outer bulbs, a high strength and an excellent luminous efficiency.