Glazing for motor vehicles

Patent metadata

Field	Value
Publication number	US-11214130-B2
Application number	US-201214130787-A
Country	US
Kind code	B2
Filing date	Jun 18, 2012
Priority date	Jul 4, 2011
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

The invention relates to a laminated glass panel for an automobile, having a curved shape resulting from the assembly of a first glass sheet, which is curved before said assembly, with an intermediate thermoplastic sheet and a second glass sheet, the thickness of which does not exceed one third of that of the first sheet, the second glass sheet not being curved, or having a curvature that is substantially smaller than that of the first sheet before the assembly thereof with the latter and the intermediate thermoplastic sheet.

First claim

The invention claimed is:

1. A laminated curved automotive glazing assembly, comprising:
a first glass sheet initially curved in this assembly,
a thermoplastic interlayer sheet, and
a second glass sheet with a thickness that is not greater than a third of that of the first sheet,
wherein the second glass sheet does not have a curvature, or has a curvature that is less than that of the first sheet, before its assembly with the first glass sheet and the thermoplastic interlayer sheet,
wherein in the assembly the second glass sheet has a surface stress that is not more than 50 MPa, and
wherein a total thickness of the first glass sheet, thermoplastic interlayer, and second glass sheet is not more than 2.8 mm.

2. The glazing according to claim 1 , wherein the first glass sheet has a thickness that is not more than 2.1 mm.

3. The glazing according to claim 1 , wherein the thickness of the second glass sheet is not more than 0.8 mm.

4. The glazing according to claim 1 , wherein the thickness of the second sheet is not less than 0.2 mm.

5. The glazing according to claim 1 , wherein the curvature of the first glass sheet is cylindrical and a radius of curvature is not less than 1 m.

6. The glazing according to claim 1 , wherein the second glass sheet is not curved before assembly.

7. The glazing according to claim 1 , wherein the interlayer sheet has a thickness that is not more than 0.8 mm.

8. The glazing according to claim 1 , wherein at least the second glass sheet is chemically toughened.

9. The glazing according to claim 1 , wherein the second glass sheet bears a system of functional layers and the system of layers comprises a layer system for filtering infrared rays on a face in contact with the thermoplastic interlayer.

10. The glazing according to claim 1 , forming a side window of a motor vehicle.

11. The glazing according to claim 1 , wherein the thickness of the second glass sheet is not greater than a fourth of that of the first glass sheet.

12. The glazing according to claim 1 , wherein in the assembly the surface stress of the second glass sheet is not more than 30 MPa.

13. The glazing according to claim 1 , wherein in the assembly the surface stress of the second glass sheet is not more than 20 MPa.

14. The glazing according to claim 1 , wherein in the assembly the surface stress of the second glass sheet is not more than 10 MPa.

15. The glazing according to claim 1 , wherein the curvature of the first glass sheet is cylindrical and a radius of curvature is not less than 1.5 m.

Assignees

• Gillard Quentin
• Hubert Renaud
• Lecomte Benoit
• Losot Rostislav
• Lucca Nerio
• Agc Glass Europe

Inventors

• Gillard Quentin
• Hubert Renaud
• Lecomte Benoit
• Losot Rostislav
• Lucca Nerio

Classifications

• B60J1/008 Primary

  of special shape, e.g. beveled edges, holes for attachment, bent windows, peculiar curvatures such as when being integrally formed with roof, door, etc. · CPC title

• Y10T428/24628

  Nonplanar uniform thickness material · CPC title

• B32B17/10137 Primary

  Chemical strengthening · CPC title

• B32B17/10889

  shaping the sheets, e.g. by using a mould (B32B17/10816 takes precedence) · CPC title

• B32B17/10816

  by pressing · CPC title