ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,504,026, issued on Dec. 23.

"Device, method, and system for removing a pump impellor from a pump shaft" was invented by Kurt George Wetzstein (Logan, Iowa).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for removing a pump impellor from an operatively associated pump shaft is provided. The method includes preventing rotation of the pump impellor in a first direction and simultaneously applying a torque to the pump shaft in the first direction, whereby the torque comprises continuous hammer impacts. A brace is used to prevent the rotation of the pump impellor, wherein the brace is fixed on a second end opposite the first end preventing rotation. ...