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:
Jul. 18, 2006
Filed:
Mar. 23, 2004
Mikio Miura, Takatsuki, JP;
Shunsuke Kakisaka, Ibaraki, JP;
Yoshiharu Nishiura, Otsu, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A metal vapor discharge lamp, comprises: a translucent ceramic envelope, the envelope comprising a center bulb for defining a discharge space and side tubes, the center bulb and the side tubes being integrally molded; a pair of current suppliers extending through hollows of the side tubes respectively, each of the current suppliers comprising an electrode and a lead-in wire, a first end of the electrode being disposed in the discharge space, a second end of the electrode being connected with the lead-in wire; a sealant for hermetically sealing open ends of the side tubes; and a light-emitting metal contained in the discharge space. An inner wall and an external wall of a seamless boundary portion between the center bulb and each of the side tubes have the smallest curvature radius of Rmm and Rmm, respectively. The center bulb has an inner diameter of D mm. The lamp has an electric power of P watts. The radius R, radius R, diameter D and electric power P satisfy,−0.00076+0.304≦≦−0.00076+0.490,   Formula (1)where P≦350 watts; and1.28≦1.39.   Formula (2)