Patent ID: 7665798

Claim:
A drag reduction means which comprises a primary duct and an elongated support means; said primary duct being configured to sidewardly deflect primary flows of a fluid which pass through said duct; said primary duct being mounted on one end of said support means of which another end is mounted on an object in the form of a vehicle which can move in the fluid to propel the primary duct forwardly into the fluid, at a location spaced forwardly of the vehicle, the support means adjusting longitudinally forwardly of the vehicle to position the primary duct at said location, the deflected fluid directed away from the vehicle frontwardly thereof to reduce drag on a side or sides of the vehicle, at least one secondary duct located on and proximate the rear of the vehicle to discharge a secondary stream of said fluid into the flow field rearwardly of the support means and vehicle, said support means being lengthwise movable relative to the vehicle, to bodily shift the primary duct longitudinally generally toward and away from the vehicle and said secondary duct, and through a range encompassing a substantial portion of the distance between the vehicle and the forwardmost position of the primary duct, there being means at the side of the vehicle to receive said secondary stream for flow to said secondary duct.