Patent ID: 8033561

Claim:
An apparatus that reduces sway of a trailer towed by a towing vehicle and has: a draw bar that has a main bar and a side bar that extends from the main bar; a first means that enables a draw arm of a trailer to be hitched to the main bar; a second means that enables the draw bar to be hitched to a vehicle; a body that is mounted on the draw bar and rotates with respect to the draw bar; a slot on the body that is sized to receive the draw arm of the trailer and is sufficiently open above to permit the draw arm to move in the slot through a vertical angular displacement; a pair of spaced apart members that define the lateral edges of the slot, and are positioned closely adjacent to the draw arm of the trailer when the draw arm is received in the slot such that horizontal angular movement of the draw arm relative to the main bar of the apparatus causes a substantially equivalent horizontal angular movement of the body relative to the main bar; and a hydraulic means that links the body and the side bar such that horizontal movement of the body relative to the main bar is dampened, thereby dampening horizontal angular movement of the trailer with respect to the vehicle.