Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Backhead and drill assembly with backhead

Backhead and drill assembly with backhead

US Patent 7617889 · Granted Nov 17, 2009

Assignee

No assignee recorded.

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Backhead and drill assembly with backhead2011
Keyed connection for drill bit2008
Percussive rotational impact hammer2003
Percussive down-the-hole hammer for rock drilling, and a drill bit used therein2003
Percussive down-the-hole hammer and a piston and drill bit therefor2001
Percussive down-the-hole rock drilling hammer and piston therefor2000
Percussive down-the-hole hammer and a drill bit therefor2000
Precussive down-the-hole rock drilling hammer2000
Method, drilling tool and rock drill bit for transferring impact energy from a t2000
Rock drilling tool, drill bit and a method of transferring percussive energy1999
Hammer device1999
Hammer device1994