US Patent Issued to MINCON INTERNATIONAL on June 2 for "Drill bit assembly for reverse circulation hammer" (Australian Inventor)

ALEXANDRIA, Va., June 2 -- United States Patent no. 12,644,338, issued on June 2, was assigned to MINCON INTERNATIONAL Ltd. (Shannon, Ireland).

"Drill bit assembly for reverse circulation hammer" was invented by Carl Blundell (Byford, Australia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A drill bit assembly for a reverse circulation down-the-hole hammer includes a percussion bit having a head portion with a cutting face at a forward end thereof with engagement means on the head portion for engagement with complementary engagement means on a drive chuck whereby rotational drive from the drive chuck may be transmitted to the percussion bit. Connection means are provided on the drive chuck adapted for conne...