US Patent Issued to SUMITOMO HEAVY INDUSTRIES on Sept. 8 for "Cryocooler and monitoring method for cryocooler" (Japanese Inventor)

ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,729,894, issued on Sept. 8, was assigned to SUMITOMO HEAVY INDUSTRIES LTD. (Tokyo).

"Cryocooler and monitoring method for cryocooler" was invented by Takaaki Morie (Yokosuka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The cryocooler includes an expander motor that operates an expander of the cryocooler, an inverter that is configured to control an operation frequency of the expander motor and is operable to drive the expander motor in the steady operation at an operation frequency lower than in the cool-down operation, a current sensor that measures a current supplied from the inverter to the expander motor, and outputs a motor current signal ...