Patent ID: 8214920

Claim:
An adapter for fitting a welding helmet to a hard hat, comprising: a housing including an outer wall and an interior surface, the outer wall including a surface defining a window therethrough, the interior surface including a recessed surface circumscribing the window, the recessed surface including at least one planar surface thereon; a rotatable boss captured within the housing against the interior surface, the boss having an annular lip including at least one planar surface thereon configured and arranged to selectively engage the at least one planar surface on the recessed surface of the housing and prevent the boss from rotating when engaged thereon and freely rotatable when disengaged therefrom; a mounting post extending from the boss and projecting through the window on the housing, the mounting post configured and arranged to selectively couple to a welding helmet; and a spring biasing said boss against said interior surface of said housing.