US Patent Issued to YAMAHA HATSUDOKI on March 11 for "Vessel propulsion apparatus, vessel, vessel engine, and exhaust structure of vessel engine" (Japanese Inventors)

ALEXANDRIA, Va., March 12 -- United States Patent no. 12,246,809, issued on March 11, was assigned to YAMAHA HATSUDOKI K.K. (Shizuoka, Japan).

"Vessel propulsion apparatus, vessel, vessel engine, and exhaust structure of vessel engine" was invented by Shinya Kasai (Shizuoka, Japan), Koichi Nakayama (Shizuoka, Japan) and Jiro Fukuoka (Shizuoka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A vessel propulsion apparatus includes an engine and a propulsion unit to be driven by the engine. The engine includes cylinders arranged in series, exhaust ports respectively connected to combustion chambers of the cylinders and curved in a predetermined downstream direction to allow exhaust gases to flow out from t...