Patent · US Expired

Incandescent lamp for motor vehicle headlights

US6822392B2 · kind B2 · utility

1Cited by

2References

2Claims

0Family size

Assignee

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE

Inventors

Gerhard Behr · Riedlingen, DE
Manfred Bühler · Herbrechtingen, DE
Christian Seichter · Herbrechtingen, DE
Klaus Wittmann · Maurepas, FR

Key dates

Filing date	Apr 8, 2003
Grant date	Nov 23, 2004
Priority date	—
Expiry date	Apr 8, 2023

Classification

Technology area (CPC H)Electricity
CPC primaryH01K1/26
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The invention relates to an incandescent lamp for a motor vehicle headlight. The secondary filament (2) is arranged in such a way that, in a projection plane that is arranged perpendicular to the reference plane (B), the edge (2a), facing the antidazzle device (4), of the image, projected onto the projection plane, of the second incandescent filament (2) is arranged over the entire length of the second incandescent filament (2) between the reference axis (A) and the antidazzle device (4), and the edge (2a), facing the antidazzle device (4), of the image, projected to the scale 1:1 onto the projection plane, of the second incandescent filament (2) has a prescribed spacing from the reference axis (A). It is thereby possible to produce the light/dark boundary for the lower beam with the aid of the edge (2a) of the secondary filament image (2).

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