ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,435,721, issued on Oct. 7, was assigned to COMPAIR DRUCKLUFTTECHNIK-ZWEIGNIEDERLASSUNG DER Gardner Denver Deutschland GMBH (Simmern, Germany).

"Drive system for a multi-stage screw compressor" was invented by Rainer Oberhausen (Simmern, Germany) and Michael Federmann (Bell, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A drive system for a multistage screw compressor with a first compressor stage with a first main rotor mounted on a first shaft in a torque-proof manner and a second compressor stage with a second main rotor mounted on a second shaft in a torque-proof manner. The drive system has a drive shaft for driving the shafts of both main r...