Land vehicles – Suspension modification enacted during travel – Including fail-safe override of hazardous condition
Reexamination Certificate
2007-10-26
2010-06-01
Dickson, Paul N (Department: 3616)
Land vehicles
Suspension modification enacted during travel
Including fail-safe override of hazardous condition
C280S005506, C280S005507, C280S006154, C280S006159, C280S124161, C280S755000, C180S041000
Reexamination Certificate
active
07726665
ABSTRACT:
A suspension system for an agricultural or construction industry vehicle is described. The suspension system comprises two hydraulic cylinders, which support a frame in relation to an axle of the vehicle, the hydraulic cylinders each having a piston-side chamber and a piston rod-side chamber and each of the chambers of the hydraulic cylinders being connectable to one another via connecting lines provided with a switch valve, a first supply line, which can be connected via a switch valve to the piston-side connecting line of the first hydraulic cylinder, a second supply line, which can be connected via a switch valve to the piston-side connecting line of the second hydraulic cylinder, a hydraulic accumulator, in each case connectable to the supply lines via proportionally adjustable orifices, a hydraulic source, a hydraulic tank, a control valve device, and an electronic control unit. In order to prevent the activation of a suspension state in critical vehicle states, means for the detection and compensation of load states of the vehicle are provided in the suspension system.
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Deere & Company
Dickson Paul N
English James
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