Patent ID: 8919802
Filing Date: 2014-12-30
Classification: B60D,B60G,B60P,B62D

Abstract:
1. A weight transferring tow dolly releasably attached to and towable behind a towing vehicle, the towing vehicle having at a rearward end portion a receiver type towing hitch defining a rearwardly opening box beam channel, the weight transferring tow dolly comprising in combination: a rigid dolly frame having plural spaced apart transverse frame beams and a tow beam structurally interconnected to the plural transverse frame beams, the tow beam having a forward end portion carrying a receiver hitch insert for releasable engagement with the rearwardly opening box beam channel of the towing vehicle; a non-steering axle having wheels and tires at each opposing end portion to support the rigid dolly frame spacedly above a supporting surface; a suspension interconnecting the rigid dolly frame and the non-steering axle, the suspension having, a pneumatic apparatus communicating between the rigid dolly frame and the swing arm to pivot the swing arm and the attached non-steering axle relative to the rigid dolly frame responsive to axial expansion and contraction of the pneumatic apparatus, and pneumatic lines and a pneumatic valve communicating with the pneumatic apparatus to supply pressurized air to the pneumatic apparatus and to drain pressurized air from the pneumatic apparatus; a rigid support frame structurally interconnected to and carried spacedly above the rigid dolly frame, the rigid support frame and the rigid dolly frame simultaneously vertically adjustably positionable responsive to the axial expansion and contraction of the pneumatic apparatus; and axial expansion of the pneumatic apparatus causes the rearward end portion of the towing vehicle to be lifted vertically upwardly and the forward end portion of the towing vehicle to be forced downwardly.