Patent ID: 8387511

Claim:
An armored cab comprising: an upper wall, a pair of opposite laterally disposed side walls, a front wall, a back wall, and a bottom wall, said cab having a longitudinal axis, said bottom wall comprising a downwardly facing smooth concave wall portion extending generally parallel to the longitudinal axis of said cab and substantially the entire length of said cab, and a pair of opposite laterally disposed wall portions extending generally parallel to the longitudinal axis of said cab and substantially the entire length of said cab, said smooth concave wall portion comprising an upper portion and a pair of opposite laterally disposed side portions extending downwardly and laterally outwardly from said upper portion, said smooth concave wall portion forming a power train tunnel of said cab, each of said opposite laterally disposed wall portions extending downwardly and laterally inwardly relative to a respective one of said side walls and terminating in a lowermost portion of said bottom wall on each lateral side of the longitudinal axis of said cab and extending substantially the entire length of said cab, said downwardly and laterally inwardly extending opposite laterally disposed wall portions and said downwardly and laterally outwardly extending opposite laterally disposed side portions of said smooth concave wall portion cooperating so as to substantially reduce a surface area of said lowermost portions of said bottom wall normal to an upwardly directed blast beneath said lowermost portions of said bottom wall.