Patent · US Expired

Electric lamp having an outer bulb

US7612503B2 · kind B2 · utility

1Cited by

1References

5Claims

0Family size

Assignee

OSRAM Gesellschaft mit beschraenkter Haftung · DE

Inventors

Thomas Bittmann · Friedberg, DE
Thomas Deutscher · Lauf an der Pegnitz, DE
Jurgen Graf · Wels, AT
Richard Semba · Augsburg, DE
Marcel Vuc · Neubukow, DE

Key dates

Filing date	Nov 21, 2005
Grant date	Nov 3, 2009
Priority date	—
Expiry date	Dec 14, 2025

Classification

Technology area (CPC H)Electricity
CPC primaryH01J9/247
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The elongate inner bulb (1) defines a longitudinal axis (A) and is sealed at mutually opposing ends by sealing parts (6; 32), an outer bulb being placed, with an adjoining tube piece, over the inner bulb and being fixed to the sealing part by means of an annular beading formed there, the end of the tube piece being radially attached to the beading, the maximum inner diameter of the beading being larger than the outer diameter of the sealing part in the region of the beading.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.