ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,478,541, issued on Nov. 25.
"Rotary massage device based on positive and negative air pressure" was invented by Qian Liu (Changde, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a rotary massage device based on positive and negative air pressure, including a housing, a rotating shaft, and a driving device. A first accommodating space is arranged in the housing, at least one chamber is arranged in the first accommodating space, a side wall of the chamber is provided with an assembly opening, the housing is provided with a suction opening, the suction opening is communicated with the chamber, and the rotating shaft is rotatably mounted ...