Drag reducer for rear end of vehicle

Details Drag reducer for rear end of vehicle Drag reducer for rear end of vehicle

1991-08-29

1993-08-17

Song, Robert R.

Land vehicles: bodies and tops

Bodies

With distinct wind deflector

B62D 3500

Patent

active

052363473

ABSTRACT:
A drag reducer to be mounted on the rear face of a truck or other vehicle. It is comprised of an enclosed bag in the shape of a truncated cone with one or more elastic cord(s) encircling it. Air is introduced into the drag reducer upon forward motion of the vehicle via a tube, the open end of which is facing the direction of motion. As air pressure is increased in the drag reducer with increasing forward velocity the tension in the surface of the bag causes the elastic cord(s) to be extended allowing the drag reducer to reach its fully expanded shape. At slow driving speeds the elastic cord(s) contract and prevent the drag reducer from falling or being blown by cross winds over the rear signal lights or license plate and from touching the road in the case of larger more aerodynamically effective drag reducers.

REFERENCES:
patent: 2737411 (1956-03-01), Potter
patent: 4553781 (1985-11-01), Johnson
patent: 4601508 (1986-07-01), Kerian
patent: 4702509 (1987-10-01), Elliott, Sr.
patent: 4978162 (1990-12-01), Labbe

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