US Patent Issued to YAMAHA HATSUDOKI on Feb. 18 for "Marine propulsion device, propeller unit, and method" (Japanese Inventor)

ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,227,277, issued on Feb. 18, was assigned to YAMAHA HATSUDOKI K.K. (Shizuoka, Japan).

"Marine propulsion device, propeller unit, and method" was invented by Isao Tateishi (Shizuoka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A marine propulsion device includes a propeller, a propeller shaft, a bushing, a damper, and a spacer. The propeller shaft supports the propeller. The bushing is between the propeller and the propeller shaft and is unitarily rotatable with the propeller shaft. The damper is fixed to the bushing to transmit rotation of the propeller shaft to the propeller. The spacer is spaced apart from the propeller in a back-and-forth dir...