ALEXANDRIA, Va., June 4 -- United States Patent no. 12,320,436, issued on June 3, was assigned to HAGEPE INTERNATIONAL B.V. (Huizen, Netherlands) and CENERGIST Ltd. (Washington, Great Britain).
"Check valve" was invented by Stijn Van Der Upwich (Enkhuizen, Netherlands).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present application relates to a check valve (1) comprising a housing (2) with at least one inlet (3) and at least one outlet (4), the housing (2) defining an inflow chamber (5) connected to the at least one inlet (3) and an outflow chamber (6) connected to the at least one outlet (4), a valve seat (7) which defines a passage between the inflow chamber and the outflow chamber, and a shutter (8)...