Patent ID: 8347999

Claim:
An electrical power generation apparatus, attachable to a vehicle having a refrigeration unit and an underside, the apparatus comprising: (a) a coupling device attachable to the underside; (b) a trailing arm comprising: (i) a first end pivotably coupled to the coupling device so that the trailing arm can pivot both vertically and laterally, and (ii) a second end coupled to at least one free-rotating wheel; (c) an air bag coupled to the vertically pivotable and laterally pivotable trailing arm, at a position between the first end and second end, and between the trailing arm and the underside, so that, when the air bag is inflated, the second end of the trailing arm is pivoted downward and the at least one free-rotating wheel is pressed against a road surface; (d) a generator mechanically coupled to and driven by the at least one free-rotating wheel and electrically coupleable to the refrigeration unit; and (e) a position sensor coupled to the trailing arm.