Anti-Fog Visor with Opposed Vents

摘要

A head-protector is described herein having a shell that is dimensioned to fit on the head of a user. The shell is formed with an opening to expose the face of the user. A locking mechanism attaches a lens to the shell and allows the lens to be pivoted between an operational position in which the lens covers the opening of the shell and a stowed position. Vents are established between an edge of the lens and the shell to establish an airflow over the inside surface of the lens to reduce fogging when the head-protector is subjected to an outside airflow such as wind. The vents can include a first vent that extends across the forehead of the user between the edge of the lens and the shell and a second vent that extends across the chin of the user between the edge of the lens and the shell.

主权项

1. A head-protector which comprises:
a shell dimensioned to fit on the head of a user, wherein the shell is formed with an opening to expose the face of the user when the shell is positioned on the head of the user; a lens dimensioned to cover the opening of the shell, wherein the lens has an edge and is made of a transparent material; and a locking mechanism for supporting the lens on the shell, wherein the locking mechanism is selectively activated to alternatively hold the lens in a stowed position wherein the lens is oriented on the shell to expose the face of the user, and in an operational position wherein the lens is oriented over the opening to establish a first vent extending across the forehead of the user between the edge of the lens and the shell and a second vent extending across the chin of the user between the edge of the lens and the shell to provide for a substantially laminar flow of air over the lens between the first vent and the second vent.