Patent ID: 8500167
Filing Date: 2013-08-06
Classification: B60S

Abstract:
1. A trailer comprising: a trailer body; a hitch for coupling said trailer to a towing vehicle; a primary wheel mounted under said trailer body and in contact with the ground for supporting said trailer and allowing said trailer to be towed; an adjustable leg mounted under said trailer body between said hitch and said primary wheel for providing secondary support of said trailer, said leg comprising: a pneumatic or hydraulic drive unit mounted on said trailer body for adjusting said leg to move said terminal end of said leg between said extended and retracted positions; a drivetrain mounted on said trailer body and operatively connected to said secondary wheel for driving said secondary wheel; a controller for controlling operation of said pneumatic or hydraulic drive unit to automatically adjust said leg to maintain balance of said trailer, and for controlling operation of said drivetrain to drive said trailer when said secondary wheel is in contact with the ground.