US Patent Issued to Ignis Technologies on Dec. 30 for "Return exhaust assembly for a reverse circulation hammer" (Australian Inventor)

ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,944, issued on Dec. 30, was assigned to Ignis Technologies Pty Ltd. (Bellevue, Australia).

"Return exhaust assembly for a reverse circulation hammer" was invented by Peter Warwick Boswell (Hovea, Australia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A return exhaust assembly 50 for a reverse circulation hammer H comprises return tube 52 having first and second ends and a seat 56 at or near the first end 54. An exhaust sleeve 58 has: a section 60 seated and resiliently supported on the seat 56; and, a portion 62 that extends to and includes an end 64 of the exhaust sleeve 58 distal the section 60. The portion 60 surrounds a length of the return tu...