ALEXANDRIA, Va., July 9 -- United States Patent no. 12,352,295, issued on July 8.
"Variable output, hydraulic drive system" was invented by Robert D. Kline (Fort Worth, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "A hydraulic drive pump system incorporates: 1) a concentric, multi-lobed cam that produces multiple strokes per revolution; 2) a piston profile that maximizes the number of large-diameter pistons arranged radially around the centerline axis; 3) a flexible piston base 50 with internal oil flow; 4) hydraulically connected cylinders which counter displacement issues raised in item 2 above; 5) variable stroke capability leading to infinitely variable output the ability to disengage unneeded cyl...