E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 10/36 (2006.01) E21B 1/00 (2006.01) E21B 4/06 (2006.01) E21B 17/07 (2006.01)
Patent
CA 2206169
A bit retention device for a bit and chuck assembly of a down-the-hole, percussive drill, for retaining a head section of a bit should the head section separate from a shank of the bit includes a chuck adapted for threadable connection to a drill casing, a drill bit, a bit retaining shoulder in the the assembly; a wear collar concentric about the chuck and bit and a flexible retaining member removably connected to the assembly, the retaining member extending radially between the wear collar and bit a sufficient distance to contact the retaining shoulder should the bit drop axially downwardly.
Atlas Copco Secoroc Llc
Ingersoll-Rand Company
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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