Patent · US Expired

Lens and projection headlight of a motor vehicle including same

US7365921B2 · kind B2 · utility

3Cited by

8References

11Claims

0Family size

Assignee

Schott AG · DE

Inventors

Ralf Bonitz · Stadecken-Elsheim, DE
Rainer Adebahr · Eschershausen, DE

Key dates

Filing date	Apr 8, 2003
Grant date	Apr 29, 2008
Priority date	—
Expiry date	Apr 8, 2023

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF21S41/25
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The plano-convex lens of a projection headlight has a holding edge (4) integrally formed on an outer lens edge and a supporting edge (5) projecting from its plane surface (3) and formed integrally with the holding edge (4). The supporting edge (5) and the holding edge (4) form a continuous cylindrical outer circumferential surface (45) extending over their outer sides. The convex surface (2) and the plane surface (3) of the lens are bright pressed surfaces so that the grinding and polishing steps usually used in making the lens can be eliminated. The method of manufacturing the lens including bright pressing the convex and plane surfaces is also part of the invention.

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