ALEXANDRIA, Va., May 5 -- United States Patent no. 12,618,424, issued on May 5, was assigned to HydraForce Inc. (Lincolnshire, Ill.).
"Hydraulic control system and method with electro-proportional pressure valve and integral check" was invented by Travis Schmidt (Oregon City, Ore.), Valeriy Kazak (Des Plaines, Ill.) and Brian Del Bene (Mundelein, Ill.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hydraulic control assembly includes means for holding pressure in a cylinder to inhibit boom or arm drop of a machine in the event that a hose between the cylinder and a main control valve (MCV) ruptures. The pressure holding means of the hydraulic control assembly include a hydraulic valve and a parts-in-body ch...