US Patent Issued to Edwards Japan on Dec. 2 for "Vacuum pump" (Japanese Inventors)

ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,486,851, issued on Dec. 2, was assigned to Edwards Japan Ltd. (Yachiyo, Japan).

"Vacuum pump" was invented by Takaaki Ono (Yachiyo, Japan) and Katsuhisa Yokozuka (Yachiyo, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A vacuum pump, which prevents adhesion of products even when a rotating body is stopped, by heating the rotating body using an alternating current (AC) magnetic field. Two heating electromagnets are disposed facing each other across a rotating body. The heating electromagnets receive a supply of AC electric current from a heating electric power source. Excitation of the heating from this AC electric current generates an AC magnetic f...