Steering device for many-axled goose-neck trailers

Claim 2

Steering device for a multi-axled goose-neck trailer which is coupled with a vehicle in front of said trailer, said steering device comprising wheels pivotable about a main axle and connected to stay rods for forcibly steering said wheels, said stay rods each connected to an intermediate member, said intermediate member also connected to a double piston rod, the ends of which are adapted for receiving a hydraulic signal from said vehicle.

Claim 3

Device as claimed in claim 1, in which the trailer is eight-axled, characterized in that the front wheel set is a trailing wheel set and the second, third and fourth wheel sets are fixed, the fifth and sixth wheel sets are trailing wheel sets and are steered by friction and the two rearmost wheel sets are forcibly steered.

Claim 4

Device as claimed in claim 1, in which the trailer is six-axled, characterized in that the front wheel set is a trailing wheel set and is friction-steered and the two last wheel sets are forcibly steered.

Claim 5

Device as claimed in claim 1, characterized by a reverse lock which is controlled from the wheel house of the tracking vehicle and which locks the steering of one or more of the trailing wheel sets and forcibly steered wheel sets of the trailer during reversing.

Claim 6

Steering device for a multi-axled goose-neck trailer which is coupled with a vehicle in front of it by a pivotable and tiltable fifth wheel hydraulically adapted to forcibly steer the rear-most wheel set of said goose-neck trailer in a direction opposite to the steering wheel of said vehicle in front of it, said steering device comprising wheels rotatable on respective wheel axles, said respective wheel axles rigidly connected with respective arms, said respective arms forming respective angle levers with said respective axles, said respective angle levers each rotatable about respective king pins, said respective king pins supported in respective bearing housings, each of said respective bearing housings fixedly connected to a main axle by respective forwardly directed extensions, said respective forwarding directed extensions each, at its forward end, connected by a link to the outer end of respective stay rods, each said respective stay rod, at its inner end, connected to an intermediate member, said intermediate member being triangular in shape and connected at its rear corner with the midpoint of a double piston rod, the ends of which are connected with hydraulic pistons located in hydraulic cylinders, said hydraulic cylinders supported by said fixed axle and hydraulically connected to said fifth wheel.

Claim 7

Steering device for a multi-axled goose-neck trailer which is coupled with a vehicle in front of it by a pivotable and tiltable fifth wheel hydraulically adapted to forcibly steer the rear-most wheel set of said goose-neck trailer in a direction opposite to the steering wheel of said vehicle in front of it, said steering device comprising wheels rotatable on respective wheel axles, said respective wheel axles rigidly connected with respective arms, said respective arms forming respective angle levers with said respective axles, said respective angle levers each rotatable about respective king pins, said respective king pins supported in respective bearing housings, each of said respective bearing housings fixedly connected to a main axle by respective forwardly directed extensions, said respective forwarding directed extensions each, at its forward end, connected by a link to the outer end of respective stay rods, each said respective stay rod, at its inner end, connected to an intermediate member, said intermediate member being triangular in shape and connected at its rear corner with the midpoint of a double piston rod, the ends of which are connected with hydraulic pistons located in hydraulic cylinders, said hydraulic cylinders supported by said fixed axle and hydraulically connected to said fifth wheel.