ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,144, issued on Dec. 30, was assigned to VOLVO CONSTRUCTION EQUIPMENT AB (Eskilstuna, Sweden).
"Power steering system for a working machine" was invented by Christian Hahn (Schmelz, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a power steering system for a working machine, said power steering system comprising at least one steering cylinder comprising two compartments separated by a piston, a tank, a steering unit comprising a steering valve and a metering device, for supplying one compartment of the steering cylinder with a metered liquid flow, a hydraulic pump for pumping liquid from the tank to the steering unit ...