US Patent Issued to HEISHIN on Sept. 9 for "Uniaxial eccentric screw pump" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,410,792, issued on Sept. 9, was assigned to HEISHIN Ltd. (Hyogo, Japan).

"Uniaxial eccentric screw pump" was invented by Eiji Uetsuji (Shiga, Japan) and Noriaki Sakakihara (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A uniaxial eccentric screw pump includes a stator having an insertion hole with an inner peripheral surface being internally threaded, and a rotor including a shaft being externally threaded and placed through the insertion hole in the stator. The stator has the insertion hole being an opening in a cross section, the opening includes a middle area and two end areas, and the middle area has lower contact pressure at least in...