Patent ID: 8272682

Claim:
Chassis of a vehicle, the chassis comprising: a pair of door sills arranged longitudinally to define a length, with each of the pair of door sills located below a respective door area, with each of the door sills defining a respective through hole extending through the door sill transverse to the length of the door sill, and a pair of central pillars, with each of the pair of central pillars comprising a single piece extrusion, with each of the pair of pillars extending perpendicularly and vertically away from a respective door sill, each of the pair of pillars being disposed through and interlocked in a respective through hole defined in a respective door sill, with each of the pair of central pillars being welded to the respective door sill in a position in which it is disposed through the respective through hole, wherein each central pillar comprises an inner tubular body disposed coaxially inside an outer tubular body, and at least two flat plates, each extending between the inner tubular body and the outer tubular body connecting the inner tubular body to the outer tubular body, the at least two flat plates being coplanar to each other and disposed on opposite sides of the inner tubular body.