Abrading – Machine – Rotary tool
Reexamination Certificate
2007-02-06
2007-02-06
Rachuba, M. (Department: 3723)
Abrading
Machine
Rotary tool
C451S233000, C451S375000, C451S453000
Reexamination Certificate
active
10529426
ABSTRACT:
A drill sharpener is provided which has a point-splitting port which simplifies the procedure for producing a split point on a drill bit undergoing sharpening. The point-splitting port is positioned relative to a grinding wheel assembly such that, when the drill held by a chuck is advanced toward the grinding wheel, a flute of the drill at the drill tip is brought into contact with the grinding wheel. The port has alignment stops therein which mate with flats provided on the barrel of the chuck to ensure proper alignment of the chuck and drill relative to the grinding wheel. The stops also limit the extent of inward travel of the chuck and drill to a predetermined distance. A debris or grit collection tube is also provided to be inserted into an unused port of the drill sharpener, to contain and confine any debris or grit attempting to exit the sharpener through the unused port.
REFERENCES:
patent: 2109308 (1938-02-01), Adams
patent: 2377271 (1945-05-01), Schumann
patent: 2426478 (1947-08-01), Whipple
patent: 2881066 (1959-04-01), Sproull et al.
patent: 3126679 (1964-03-01), Abadjieff
patent: 4093247 (1978-06-01), Bernard et al.
patent: 4471581 (1984-09-01), Bernard et al.
patent: 4485596 (1984-12-01), Bernard et al.
patent: 4551948 (1985-11-01), Kindig et al.
patent: 4916866 (1990-04-01), Bernard et al.
patent: 5031925 (1991-07-01), Tatsu et al.
patent: 5062322 (1991-11-01), Sinko
patent: 5097634 (1992-03-01), Hulme
patent: 5179809 (1993-01-01), Schroeder
patent: 5400546 (1995-03-01), Christian et al.
patent: 5549509 (1996-08-01), Hirst et al.
patent: 5735732 (1998-04-01), Bernard
patent: 5788559 (1998-08-01), Jungnitsch
patent: 6110018 (2000-08-01), Hepworth
patent: 3342914 (1985-06-01), None
Bernard David A.
Christian William C.
Harris Scott
Mosttler Keith
Fellers , Snider, et al.
Professional Tool Manufacturing, LLC
Rachuba M.
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