Coated windshield with special heating circuit for wiper arm...

H - Electricity – 05 – B

Patent

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Details

H05B 3/84 (2006.01) B32B 17/10 (2006.01) B60S 1/02 (2006.01) B60S 1/04 (2006.01)

Patent

CA 2074048

A windshield having an upper vision area with a coating and a lower heating area aligned with a wiper blade storage area. When the coating is electroconductive, first and second bus bars are provided to selectively connect the coating to the terminals of a power source to provide a windshield heating circuit for defogging or defrosting its vision area. One of the bus bars is also connected to a heating element along a lower area of the windshield that faces a storage area for windshield wipers. The heating element is selectively connected to a different terminal of the power source from the terminal connected to one of the bus bars to cooperate with one of the bus bars and the power source to provide a storage area heating circuit. The windshield heating circuit and the storage area heating circuit may be operated independently, either separately or simultaneously, from a common electric power source.

La présente invention vise un pare-brise constitué d'une portion supérieure de visibilité, pourvue d'un revêtement, et d'une portion inférieure chauffante placée d'alignement avec un compartiment pour recevoir les balais d'essuie-glace. Lorsque le revêtement est conducteur d'électricité, deux bus d'alimentation le relient de manière sélective aux bornes d'une source d'alimentation et créent ainsi un circuit de chauffage qui assure le désembuage et le dégivrage de la portion de visibilité du pare-brise. L'un des deux bus d'alimentation est également relié à un élément chauffant le long de la portion inférieure du pare-brise qui fait face au compartiment d'essuie-glace. L'élément chauffant est relié de manière sélective à une autre borne que celle déjà reliée au bus d'alimentation et forme avec ce bus et la source d'alimentation un circuit de chauffage pour le compartiment à essuie-glace. Le circuit de chauffage du pare-brise et le circuit de chauffage du compartiment fonctionnent indépendamment l'un de l'autre, soit séparément, soit simultanément, et sont alimentés par une source d'énergie électrique commune.

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