US Patent Issued to NATIONAL OILWELL VARCO on July 21 for "Pump fluid end with toroidal surface at intersection of plunger bore and cross bore" (Oklahoma Inventors)

ALEXANDRIA, Va., July 21 -- United States Patent no. 12,687,164, issued on July 21, was assigned to NATIONAL OILWELL VARCO LP (Houston).

"Pump fluid end with toroidal surface at intersection of plunger bore and cross bore" was invented by James Sterling Evans (Owasso, Okla.) and Kyle Christopher Chady (Broken Arrow, Okla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A positive displacement pump system can include a fluid end block, which can be configured to provide a pumping chamber and control a flow of a fluid through the positive displacement pump system. The fluid end block can include a first cylindrical wall defining a plunger bore extending partially through the fluid end block and a second cylindr...