Motor vehicles – Vehicle trains – Motorized trailer
Patent
1992-10-19
1994-07-26
Tyson, Karin L.
Motor vehicles
Vehicle trains
Motorized trailer
180209, B62D 6112
Patent
active
053320522
ABSTRACT:
A method of transporting commercial cargoes by truck-tractor/semi-trailer over roadways and by self-propelled/remote-controlled semi-trailer in off-road conditions. The self-propelled semi-trailer can disconnect from its pulling truck-tractor and deliver cargoes through all types of off-road terrains or conditions then reconnect and travel over roadways again. A plurality of permanently mounted stationary and/or retractable axles, with non-steerable wheels attached, are mounted at the rear-section of the self-propelled semi-trailer chassis for supporting it during connected or disconnected operating modes. A retractable axle is permanently mounted ahead of the rearward mounted wheel axles for supporting the weight of the front part of the semi-trailer when it is disconnected from its pulling truck-tractor. The retractable forward mounted axle has steerable wheels at either end for steering the semi-trailer in its disconnected operating mode. A engine producing rotational energy is permanently mounted to the semi-trailer chassis. The rotational energy is coupled to one or more of the semi-trailer permanently mounted stationary and retractable axle wheels causing the semi-trailer to be self-propelled at variable speeds in either forward or reverse direction. A radio-control system is used to remotely control all functions of the self-propelled semi-trailer including its detaching/attaching operation.
REFERENCES:
patent: 2235175 (1941-09-01), Simpkins et al.
patent: 3783960 (1974-01-01), Feliz
patent: 4368793 (1983-01-01), Igarashi
patent: 4369855 (1983-01-01), Buschbom et al.
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