Bit head retaining system and method of installing a bit...

Details Bit head retaining system and method of installing a bit... Bit head retaining system and method of installing a bit...

2005-09-06

2005-09-06

Bagnell, David (Department: 3672)

Boring or penetrating the earth

Processes

C175S415000

Reexamination Certificate

active

06938710

ABSTRACT:
A bit head retaining system includes a bit head having an upper end and a working face, and a retention sleeve adapted to be connected to an end of a drill casing and having an internal opening in which at least a portion of the bit head above the working face is disposed, the bit head being secured to the retention sleeve so as to be axially immovable relative to the retention sleeve. A method of installing a bit head in a percussion drill is also disclosed.

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patent: 6290008 (2001-09-01), Portwood et al.
patent: 6698537 (2004-03-01), Pascale et al.

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