Flat heating element
AssigneeW.E.T. Automotive Systems AG
InventorMichael Weiss
Life of this patent
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Abstract
This invention relates to a flat heating element in particular for heating surfaces in contact with the user in the passenger compartment of a vehicle, comprising at least one electrical conductor. According to the invention, the electrical conductivity of at least one of these electrical conductors is at least temporarily reduced if the temperature thereof at least locally exceeds a permissible maximum temperature.
Claims20
A heating element for heating user-contacted surfaces of a passenger compartment of a vehicle, comprising:
- one or more electrical conductors including at least one strap wherein an electrical conductivity of least one of the one or more one electrical conductors is irreversibly reduced by at least localized self destruction if the temperature thereof at least locally exceeds a permissible maximum temperature.
A heating element for heating user-contacted surfaces of a passenger compartment of a vehicle, comprising:
- one or more electrical conductors disposed on a conductor sup ort and including at least one strand, wherein an electrical conductivity of at least one of the one or more one electrical conductors is irreversibly reduced by at least localized self destruction if the temperature thereof at least locally exceeds a permissible maximum temperature of at most 280° C.
A heating element for heating user-contacted surfaces of a passenger compartment of a vehicle, comprising:
- one or more electrical conductors disposed on a conductor support and in at least a strand,
- wherein an electrical conductivity of at least one of the one or more one electrical conductors is irreversibly reduced by at least localized self destruction if the temperature thereof at least locally exceeds a permissible maximum temperature or if a heating current exceed a permissible current load;
- and
- wherein the conductor support loses its m cohesion if the temperature there of at least locally exceeds the permissible maximum temperature thereby destroying conductivity of at least one of the one or more electrical conductors.
Dependencies are inferred from the claim text.