US Patent Issued to Leybold on Aug. 5 for "Screw pump with a tapered suction-side section and a pressure-side section with a decreasing clearance" (German Inventors)

ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,378,961, issued on Aug. 5, was assigned to Leybold GmBH (Cologne, Germany).

"Screw pump with a tapered suction-side section and a pressure-side section with a decreasing clearance" was invented by Roland Albert Muller (Cologne, Germany) and David Thomas Chrisp (Cologne, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A screw pump comprising a housing defining a chamber and two screw rotors. Wherein each screw rotor comprises a rotor shaft and at least two displacement elements connected with the rotor shaft. Each displacement element having at least one helical protrusion. One of the displacement elements is a suction-side displacement element arr...