ALEXANDRIA, Va., April 15 -- United States Patent no. 12,601,149, issued on April 14, was assigned to Caterpillar Work Tools B.V. (s-Hertogenbosch, Netherlands).
"Automatic pressure release" was invented by James Edward Humphrey (Bourne, Great Britain), Sebastian Jacob (Ilmenau, Germany) and Tobias Lippa (Schwandorf, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A controller for hydraulic system of a work machine is provided. The controller is configured to perform a worktool disconnect routine to reduce pressure in a first worktool line and a second worktool line of the hydraulic system. The hydraulic system comprises a spool valve, a first worktool port connected to the spool valve by the first wo...