Heatable luminaire cover

Patent metadata

Field	Value
Publication number	US-9994195-B2
Application number	US-201214361695-A
Country	US
Kind code	B2
Filing date	Dec 7, 2012
Priority date	Dec 20, 2011
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

A heatable luminaire cover is described. The heatable luminaire cover has a polymeric main body, a first busbar, a second busbar and at least two conductor tracks on the inside of the polymeric main body.

First claim

The invention claimed is:

1. A heatable luminaire cover, comprising at least:
a polymeric main body;
a first busbar;
a second busbar; and
a plurality of conductor tracks on an inner side of the polymeric main body,
wherein each conductor track of the plurality of conductor tracks is electrically connected to the first busbar and to the second busbar, independently from other conductor tracks of the plurality of conductor tracks,
wherein at least one section of each conductor track of the plurality of conductor tracks is embedded into the polymeric main body, wherein the plurality of conductor tracks is embedded into the surface of the polymeric main body at a depth that is from 50% to 90% of their thickness, and
wherein the plurality of conductor tracks is arranged between the first busbar and the second busbar and wherein the plurality of conductor tracks is arranged between the first busbar and the polymeric main body and between the second busbar and the polymeric main body.

2. The luminaire cover according to claim 1 , wherein the polymeric main body contains at least polycarbonate and/or polymethyl methacrylate.

3. The luminaire cover according to claim 1 , wherein the thickness of the polymeric main body is from 2 mm to 5 mm.

4. The luminaire cover according to claim 1 , wherein the plurality of conductor tracks contains at least tungsten, copper, nickel, manganese, aluminum, silver, chromium, iron, and/or alloys thereof.

5. The luminaire cover according to claim 1 , wherein the plurality of conductor tracks have a thickness of 15 μm to 200 μm.

6. The luminaire cover according to claim 1 , wherein the first busbar and the second busbar contain at least tungsten, copper, nickel, manganese, aluminum, silver, chromium, iron, and/or alloys thereof.

7. The luminaire cover according to claim 1 , wherein a protective coating that contains at least a polysiloxane, a polyacrylate, a poly methacrylate, and/or a polyurethane is arranged on an outer side of the polymeric main body.

8. The luminaire cover according to claim 1 , wherein the plurality of conductor tracks are electrically connected to the first busbar and the second busbar via a soldering compound.

9. The luminaire cover according to claim 1 , wherein a region of each conductor track of the plurality of conductor tracks is arranged between a first lower busbar and a first upper busbar and another region of each conductor track of the plurality of conductor tracks is arranged between a second lower busbar and a second upper busbar.

10. A method comprising:
using the heatable luminaire cover according to claim 1 as a cover for lights of means of transportation for travel on land, in the air, or on water, in particular for headlights, taillights, side-marker lights, and/or position lights of passenger cars, trucks, buses, streetcars, subways, trains, and motorcycles.

11. The luminaire cover according to claim 1 , wherein the plurality of conductor tracks are embedded into the surface of the polymeric main body at a depth that is from 60% to 75% of their thickness.

12. The luminaire cover according to claim 5 , wherein the plurality of conductor tracks have a thickness of 25 μm to 90 μm.

13. The luminaire cover according to claim 7 , wherein a protective coating has a thickness from 1 μm to 50 μm.

14. The luminaire cover according to claim 7 , wherein a protective coating has a thickness from 2 μm to 25 μm.

Assignees

• Saint Gobain

Inventors

• Lesmeister Lothar
• Schlarb Andreas
• Schmidt Sebastian
• Guldan Marcus

Classifications

• H05B2203/011

  Heaters using laterally extending conductive material as connecting means · CPC title

• F21S45/10

  Protection of lighting devices (cooling of lighting devices F21S45/40; waterproofing of lighting devices F21S45/50) · CPC title

• H05B2203/014

  Heaters using resistive wires or cables not provided for in H05B3/54 · CPC title

• F21S41/28

  Cover glass · CPC title

• H05B3/06

  Heater elements structurally combined with coupling elements or holders · CPC title