Patent ID: 6945865

Claim:
An air return bulkhead adapted for use with a refrigeration vehicle having a vertical wall that carries a refrigeration unit having inlet and outlet openings, comprising (a) a unitary bulkhead body ( 2 ) formed of synthetic plastic material, including: (1) a generally-rectangular vertical first wall ( 4 ) having horizontal top ( 4 a ) and bottom ( 4 b ) edges, and a pair of vertical sides ( 4 c ) edges; and (2) generally-rectangular top ( 6 ), bottom ( 8 ), and side ( 10 , 12 ) walls having first edges connected with the corresponding edges of said first wall, respectively, said top and side walls being generally horizontal and vertical, respectively, said top, bottom and side walls having second edges that are opposite said first edges and that are contained in a first plane that is parallel with said vertical first wall, whereby when said bulkhead body is mounted on the vehicle vertical wall with said second edges adjacent the vehicle wall, said first, top, bottom and side walls cooperate with the vehicle wall to define a plenum chamber ( 24 ) adapted for communication with the refrigeration unit inlet opening; (3) said bottom wall containing a plurality of inlet apertures ( 26 , 28 ) for supplying air from the refrigeration vehicle into said plenum chamber, said inlet apertures being arranged in a plurality of vertically spaced horizontal rows; (4) said bottom wall containing a plurality of support recesses ( 30 ) that are spaced downwardly from said first wall bottom edge, said support recesses being horizontally spaced and extending generally horizontally toward and terminating adjacent said first plane, said support recesses being arranged within said lowermost row of apertures.