US Patent Issued to Rosenboom Machine & Tool on April 7 for "Seal plate method for communicating retract oil to retract side of piston in hydraulic cylinder" (Iowa Inventors)

ALEXANDRIA, Va., April 7 -- United States Patent no. 12,595,811, issued on April 7, was assigned to Rosenboom Machine & Tool Inc. (Sheldon, Iowa).

"Seal plate method for communicating retract oil to retract side of piston in hydraulic cylinder" was invented by Allen John Tewes (Sheldon, Iowa), Darin M. Rosenboom (Sheldon, Iowa) and Don Fjeld (Sheldon, Iowa).

According to the abstract* released by the U.S. Patent & Trademark Office: "A double acting hydraulic cylinder can move in two directions due to hydraulic oil pressing on opposite sides of a piston. To improve on double acting cylinder operation, a seal plate is placed adjacent the cylinder to separate extend and retract cavities of the cylinder. The seal plate is sized to allow oil t...