Patent · US Expired

Headlight for dim head lamps of motor vehicles

US4701834A · kind A · utility

2Cited by

4References

21Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Gerhard Gläser · Stuttgart, DE
Gerhard Lindae · Leonberg, DE
Peter Perthus · Stuttgart, DE
Heinz Rein · Reutlingen, DE

Key dates

Filing date	Aug 5, 1986
Grant date	Oct 20, 1987
Priority date	—
Expiry date	Aug 5, 2006

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF21S41/28
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A headlight for dim head lamps of motor vehicles includes a paraboloid reflector which has a glowing spiral, and a transparent pane on the inner surface of which seven fields with differently acting optical means are provided. These fields reflect light rays emitted by the glowing spiral and reflected by predetermined zones of the reflector and form a dimming light.

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