ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,871, issued on Dec. 30, was assigned to TROBOLO Europe Sp.zo.o (Poznan, Poland).
"Check valve with ventilation device" was invented by Friedrich Lange (Niepruszewo, Poland).
According to the abstract* released by the U.S. Patent & Trademark Office: "A check valve comprising, between an inlet end and an opposite outlet end along a common longitudinal axis, optionally an adapter arranged between the inlet end and a seal seat, a seal seat formed by a rigid scaffold, a closure element formed by an elastic closure part, optionally a stop ball, and optionally a stop that can be latched to the scaffold, wherein the scaffold and the closure part are shaped to match one another in the reg...