Drill string for upward drilling and components therefor

Details Drill string for upward drilling and components therefor Drill string for upward drilling and components therefor

2006-10-31

2006-10-31

Neuder, William (Department: 3672)

Boring or penetrating the earth

With tool shaft detail

C175S417000, C173S104000

Reexamination Certificate

active

07128172

ABSTRACT:
A rock drill includes a housing in which are disposed a reciprocable percussive device, slidably mounted in the housing, a rotary device, and a shank adapter aligned with the percussive device. The shank adapter includes first and second adapter portions. The first adapter portion has a front end and a rear end, the rear end arranged to be impacted by the percussive device and rotated by the rotary device. The second adapter portion has a rear end releasably connected to the front end of the first adapter portion, and a front end carrying a coupling adapted for connection with a drill rod component.

REFERENCES:
patent: 3554306 (1971-01-01), Wilburn
patent: 4296821 (1981-10-01), Larson
patent: 5415240 (1995-05-01), Mundjar
patent: 6092612 (2000-07-01), Brady
patent: 6102141 (2000-08-01), Engstrom et al.
patent: 6241033 (2001-06-01), Hoffman
patent: 6293360 (2001-09-01), Liljebrand et al.
patent: 509 425 (1996-04-01), None

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