Boring or penetrating the earth – Bit or bit element – Core forming type
Reexamination Certificate
2008-03-12
2009-11-24
Bagnell, David J (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Core forming type
C299S041100
Reexamination Certificate
active
07621352
ABSTRACT:
A core catcher includes a catcher rod removably attachable to a core drill. The catcher rod is inserted through a pilot hole in a substrate from which a core is to be removed. A catching element is removably attachable such as by clamping the catching element to a distal end of the catcher rod on an underside of the substrate. A bearing may be disposed between the catching element and the substrate. When severed from the substrate, the core falls only a short distance along the catcher rod and comes to rest on the bearing and the catching element. Thus, the core is inhibited from falling to a floor or ground below the substrate. A bucket may also be supported on the distal end of the catcher rod in order to collect cutting fluid.
REFERENCES:
patent: 4279551 (1981-07-01), Wilterding
patent: 6206616 (2001-03-01), Smith et al.
patent: 6514017 (2003-02-01), DeBlasio
patent: 6558089 (2003-05-01), DeBlasio
patent: 7357605 (2008-04-01), Weiler
patent: 2004/0191014 (2004-09-01), May
Bagnell David J
Kunzler & McKenzie
Sayre James G.
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