PASSIVE REDUCTION OR ELIMINATION OF FROST AND FOG WITH EXPANDABLE AIR CONTAINER

摘要

Lens fogging or frosting on an instrument lens may be reduced or prevented by hermetically sealing the instrument housing. Damage or rupture of the hermetically sealed housing due to an increase in pressure within the housing may be avoided while maintaining the hermetic seal by connecting a reservoir having an expandable volume to the housing.

主权项

1. A vehicle instrument configured to reduce lens fogging or frosting, the instrument comprising:
a housing which comprises a vent; a lens having a surface exposed to an interior space within the housing; and, an expandable reservoir operatively connected to the vent; wherein the interior space is hermetically isolated from an exterior of the housing.