Patent ID: 8197193

Claim:
An air distribution adjustable restriction comprising: a blower housing having first and second side walls, a top wall and a bottom wall that are connected together to define a rectangular air flow outlet opening of the blower housing and an air flow path having an air flow direction from the blower housing and through the air flow outlet opening; a rectangular restrictor plate attached to the blower housing bottom wall in the air flow path, the restrictor plate having a bottom edge, a top edge opposite the bottom edge, and first and second side edges on opposite sides of the restrictor plate; a pivot connection connecting the restrictor plate bottom edge to the blower housing bottom wall for pivoting movement of the restrictor plate through a plurality of adjusted angular positions of the restrictor plate relative to the bottom wall where in each adjusted position the restrictor plate extends in the air flow direction from the bottom edge to the top edge of the restrictor plate; and, a sliding connection attaching at least one of the restrictor plate first and second side edges to the respective first and second side walls of the blower housing to hold the restrictor plate in an adjusted angular position relative to the blower housing bottom wall, the sliding connection also providing a visual indication of the adjusted angular position of the restrictor plate inside the blower housing from an exterior environment of the blower housing.