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. 27, 2013
Filed:
May. 02, 2011
Yukiya Kanazawa, Osaka, JP;
Atsushi Utsubo, Osaka, JP;
Shunsuke Kakisaka, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
The present invention aims to provide a metal vapor discharge lamp that has an outer tube less likely to break, and that is obtained at low manufacturing cost. A metal vapor discharge lampcomprises: an outer tubehaving an open end portionat one end and a closed end portionat another end; an inner tubehoused in the outer tube; a discharge tubehoused in the inner tube; and a baseattached to the open end portionof the outer tube, wherein relationships of t≧1.1×d; 0<d; and 0.3≦t are satisfied, where t denotes a minimum thickness, in millimeters, of the closed end portionof the outer tube, d denotes a shortest distance, in millimeters, in a direction of a longitudinal axis of the outer tube, between an inner surfaceof the closed end portionof the outer tubeand an outer surfaceof an end portionof the inner tube, the end portionbeing located opposite from the base