ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,857, issued on Nov. 3, was assigned to Freudenberg Flow Technologies LLC (Houston).
"Scraper seal" was invented by Sebastian Ospina (Houston), Brian A. Wallace (Kingwood, Texas), Ian Smitham (Bridgend, Great Britain) and Patrick Rawls (Cypress, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "A seal assembly includes a pair of pipe couplings configured to be secured to a respective pair of pipes, each pipe coupling including an annular seal surface. An annular metal seal ring includes a pair of seal lips configured to engage a respective one of the annular seal surfaces of the pair of pipe couplings. A pair of scraper rings are secured to the pai...