US Patent Issued to CHIFENG HAO FENG DRILLING on July 15 for "Hydraulic collapsible rotary stand for wireline coring underground drill rig" (Chinese Inventor)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,359,513, issued on July 15, was assigned to CHIFENG HAO FENG DRILLING Co. LTD. (Chifeng, China).

"Hydraulic collapsible rotary stand for wireline coring underground drill rig" was invented by Ruifeng Bai (Chifeng, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A hydraulic collapsible rotary stand for a wireline coring underground drill rig includes two main hydraulic supporting posts, at least one hydraulic post erection cylinder, a collapsible stand base, a horizontal rotating base, and a rotary lifting cylinder, where the rotary lifting cylinder drives the collapsible stand base to move up or down; post mounting rods are hinged at a front side o...