US Patent Issued to HITACHI-JOHNSON CONTROLS AIR CONDITIONING on Nov. 3 for "Scroll compressor and air conditioning device" (Japanese Inventors)

ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,740, issued on Nov. 3, was assigned to HITACHI-JOHNSON CONTROLS AIR CONDITIONING INC. (Tokyo).

"Scroll compressor and air conditioning device" was invented by Allen Feng (Tokyo), Jason Peng (Tokyo) and Ben Ma (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An end plate of a fixed scroll of a scroll compressor has a back pressure passage, at least two recesses and a plurality of bypass ports. The back pressure passage communicates a first fluid pocket of the two fluid pockets with a back pressure chamber, each of the bypass ports communicates one of the fluid pockets with one of the recesses, and a piston assembly of one of the capacity modulati...