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:
Aug. 19, 2008
Filed:
Nov. 12, 2002
Shiro Iida, Kyoto, JP;
Kenji Nakano, Kyoto, JP;
Noriyuki Uchida, Hirakata, JP;
Tatsuhiro Yabuki, Takatsuki, JP;
Junichi Takahashi, Takatsuki, JP;
Takashi Ueda, Takatsuki, JP;
Hiroki Kitagawa, Takatsuki, JP;
Shiro Iida, Kyoto, JP;
Kenji Nakano, Kyoto, JP;
Noriyuki Uchida, Hirakata, JP;
Tatsuhiro Yabuki, Takatsuki, JP;
Junichi Takahashi, Takatsuki, JP;
Takashi Ueda, Takatsuki, JP;
Hiroki Kitagawa, Takatsuki, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
Disclosed is a compact self-ballasted fluorescent lamp with higher luminous efficiency than conventional lamps and improved luminous flux rising characteristics at lamp startup equivalent to those of general fluorescent lamps. The compact self-ballasted fluorescent lamp () includes an arc tube () formed by a bent glass tube () covered with a globe (). The glass tube () has a turning part substantially in the middle between its both ends, a first spiral part starting from one end and wound around an axis toward the turning part, and a second spiral part starting from the turning part and wound around the axis toward the other end. The arc tube () has mercury enclosed therein in a single form. The glass tube () has a substantially circular-shaped cross section and an inner diameter of 7.4 mm. The turning part is connected to the globe () via a heat-conductive member ().