Patent · US Active

High-pressure discharge lamp

US7705538B2 · kind B2 · utility

1Cited by

4References

8Claims

0Family size

Assignee

OSRAM Gesellschaft mit beschraenkter Haftung · DE

Inventors

Dirk Grundmann · Berlin, DE
Andreas Naujoks · Birkenwerder, DE
Conrad Schimke · Berlin, DE
Frank Werner · Berlin, DE

Key dates

Filing date	Nov 18, 2005
Grant date	Apr 27, 2010
Priority date	—
Expiry date	Oct 27, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH01J61/827
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A high-pressure discharge lamp includes a quartz glass discharge chamber (1) having at least one end (11) provided with a molybdenum film sealing element (2) and at least one electrode (4) which is connected to the sealing element (2) and is protruded in the lower chamber (10) of the discharge chamber (1), wherein the lamp includes a spiral (5) whose slope is equal to or greater than 600% and which encompasses the part of the electrode (4) in the end (11) area provided with the sealing element (2) of the discharge chamber (1) outside of the sealing element (2).

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