Appeal No. 2001-1473
Application 08/946,736
a motor disposed in said housing having a motor shaft
extending therefrom;
a grinding wheel assembly comprising a grinding wheel
operatively coupled to said motor shaft;
a drill mounting chuck;
a pair of peripheral cams carried by the barrel portion of
the chuck;
said housing defining at least one chuck receiving ports
[sic, port] having a chuck receiving sleeve therein to position
the chuck and a drill in operative relation to a grinding surface
of the grinding wheel;
wherein said grinding wheel is made of steel and is of a
small diameter, and said grinding surface comprises diamond
plated to said grinding wheel; and
wherein said motor operates at speeds on the order of 15,000
revolutions per minute.
29. A drill sharpener comprising:
a housing;
a grinding wheel assembly comprising a grinding wheel and
means for coupling said grinding wheel assembly to a motor shaft;
said housing defining at least one chuck receiving port
having a chuck receiving sleeve therein to position a chuck and a
drill to be sharpened in operative relation to a grinding surface
of the grinding wheel;
wherein said grinding wheel comprises a hollow cylindrical
metal ring having diamond particles plated to an outer surface
thereof to form said grinding surface, and a hub around which
said cylindrical ring is fitted, wherein said hub includes said
means for coupling said grinding wheel assembly to a motor shaft.
THE EVIDENCE
The items relied on by the examiner as evidence of
obviousness are:
Liss 3,574,975 Apr. 13, 1971
Christian et al. (Christian) 5,400,546 Mar. 28, 1995
Wiand 5,681,211 Oct. 28, 1997
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