US 12,030,562 B2
Semi-trailer for transporting a load to be moved
Fabrizio Lippi, Borgo San Dalmazzo (IT); and Francesco Froni, Borgo San Dalmazzo (IT)
Assigned to Faymonville Distribution AG, Walsswampech (LU)
Appl. No. 17/278,076
Filed by Faymonville Distribution AG, Waisswampech (LU)
PCT Filed Sep. 20, 2019, PCT No. PCT/IB2019/057991
§ 371(c)(1), (2) Date Mar. 19, 2021,
PCT Pub. No. WO2020/058934, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 100932 (LU), filed on Sep. 21, 2018.
Prior Publication US 2021/0347418 A1, Nov. 11, 2021
Int. Cl. B62D 53/06 (2006.01); B60G 21/067 (2006.01)
CPC B62D 53/068 (2013.01) [B60G 21/067 (2013.01); B62D 53/064 (2013.01); B60G 2204/8304 (2013.01); B60G 2300/042 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A semi-trailer for transporting a load to be moved and having its own longitudinal axis; the semi-trailer comprising:
a front wheeled module comprising a right-hand front row and a left-hand front row of front bogies, each provided with its own hydraulic cylinder for actuating a respective hydraulic suspension;
a rear wheeled module comprising a right-hand rear row and a left-hand rear row of rear bogies, each provided with a respective hydraulic cylinder for actuating a corresponding hydraulic suspension;
a coupling unit for coupling the front wheeled module to a tractor and comprising at least one hydraulic jack for transferring part of the load to be moved to the tractor; and
a hydraulic circuit for connecting and controlling said hydraulic cylinders; said hydraulic circuit comprising a first hydraulic distribution unit interposed between the hydraulic cylinders of the front and rear rows of bogies and configured in such a way that the sum of the instantaneous load-supporting pressures acting on the cylinders of the right-hand front row and the cylinders of said left-hand rear row is equal to the sum of the instantaneous pressures controlling the cylinders of the left-hand front row and the cylinders of the right-hand rear row, wherein said hydraulic circuit also comprises a second hydraulic distribution unit; said second hydraulic unit being configured to send to said hydraulic jack a pressure signal based on the sum of the instantaneous load-supporting pressures acting on the hydraulic cylinders of said right-hand front row and of said left-hand front row;
wherein said second hydraulic unit comprises a first and a second double-acting hydraulic member having respective movable members firmly connected to each other; the movable member of said first hydraulic member separating two first variable-volume chambers from one another and the movable member of said second hydraulic member separating two second variable-volume chambers from one another; one of said first chambers being hydraulically connected to the hydraulic cylinders of said right-hand front row of front bogies, and the other to said hydraulic jack; one of said second chambers being hydraulically connected to the hydraulic cylinders of said left-hand front row, and the other to said hydraulic jack.