The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 30, 1993
Filed:
Aug. 27, 1991
Franz Kramling, Aachen, DE;
Friedrich-Wilhelm Berndsen, Aachen, DE;
Saint-Gobain Vitrage International, Courbevoie, FR;
Abstract
A vertically adjustable composite motor vehicle side glazing, particularly a door window glazing, is made from composite glass including two 1.5 to 3.5 mm thick thermally tempered individual glazings with a thermoplastic intermediate layer. Each individual glazing has in the marginal area tensile stresses in the core, which in the case of a glazing thickness of 2 mm amount to 54 to 76 MN/m.sup.2 and for a glazing thickness of 3 mm amount to 46.7 to 71.2 MN/m.sup.2. In the central zone within the marginal area the individual glazings have tensile stresses in the core, which in the case of a glazing thickness of 2 mm amount to 38 to 67 MN/m.sup.2, while for a glazing thickness of 3 mm amount to 33 to 60 MN/m.sup.2. Such composite glazings have high strength in the marginal area and a low strength in the central zone. Therefore they have excellent characteristics both from the static standpoint and from that of accident safety.