US Patent Issued to China Railway Sunward Engineering Equipment on April 14 for "Casting process of central rotary joints" (Chinese Inventor)

ALEXANDRIA, Va., April 15 -- United States Patent no. 12,599,959, issued on April 14, was assigned to China Railway Sunward Engineering Equipment Co. Ltd. (Guangzhou, China).

"Casting process of central rotary joints" was invented by Xiong Nie (Guangzhou, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A casting process of a central rotary joint includes the steps of obtaining an upper casting mold, a lower casting mold, and a sand core through 3-dimensional printing, inserting the chill into the sand core, placing the sand core with the chill in the lower mold, inverting the upper mold onto the lower mold to form a assembled mold and define a casting cavity and a vertical pouring channel connected to t...