Patent ID: 6892839

Claim:
A multi-combination vehicle for use in transporting a product over roadways, said vehicle comprising: a powered towing unit having a chassis, a forward, wheeled steering axle suspended from said chassis and a rear axle assembly having at least one wheeled axle and suspended from said chassis by a rear suspension system, said wheeled axles supporting the powered unit for movement over the roadways, wherein at least one of said wheeled axles comprises a driving axle, said powered towing unit further including a first source of motive power mounted on said chassis and means for transmitting torque from said first source of motive power to said driving axle; and a power trailer mechanically coupled to said powered towing unit and having a front end and a rear end, said trailer including a chassis, an unpowered dolly coupled to and supporting the front end of said trailer chassis, and at least one wheeled, driven axle supporting the rear end of the power trailer for movement over the roadways, said at least one wheeled, driven axle being suspended from the rear end of said chassis of said power trailer, said power trailer including a second source of motive power mounted below said trailer chassis and means for transmitting torque from said second source of motive power to said at least one wheeled driven axle, said powered trailer further including a cooling means mounted on said trailer-chassis remote from said second source of motive power, said cooling means being in fluid communication with said second source of motive power, said powered towing unit further including first engine control means located in a cab of said unit, said power trailer further including second engine control means located in said powered towing unit cab, said first and second control means comprising a dual-potentiometer accelerator pedal.