US Patent Issued to Center Rock on Jan. 13 for "Down-the-hole hammer having an inverted casing" (Virginia, Pennsylvania Inventors)

ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,102, issued on Jan. 13, was assigned to Center Rock Inc. (Berlin, Pa.).

"Down-the-hole hammer having an inverted casing" was invented by Warren Thomas Lay (Catawba, Va.) and Austin C. Hine (New Florence, Pa.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A down-the-hole drill hammer comprising a casing having externally threaded distal end, and a chuck having internal threads threadedly connectable to the distal end of the casing. The down-the-hole drill hammer further comprising a drill bit having a head and a shank extending proximally from the head, and a bit retaining ring between the casing and the chuck for releasably retaining the drill bit."...