Appeal No. 2001-1473
Application 08/946,736
the motor, either Borazon or diamond cutting grit electroplated
on the cutting surfaces of the wheels 20, 22, and a drill chuck
24 having peripheral cam surfaces 48 and 50.
The appellant does not dispute the examiner’s assessment
(see page 5 in the revised answer) that Christian responds to all
of the limitations in claim 29 except for those requiring a
grinding wheel which comprises a hollow cylindrical metal ring
having diamond particles plated to its outer surface and a hub
around which the cylindrical ring is fitted, wherein the hub
includes means for coupling to a motor shaft. To cure these
deficiencies in Christian, the examiner turns to Wiand.
Wiand discloses several embodiments of a grinding wheel
generally composed of a core element rigidly secured to a drive
shaft via a set screw and typically made of brass, and a drop-on
cylindrical grinding bit slidably engageable with, and readily
removable from, a cylindrical portion of the core element and
made of a metal such as brass or steel with a diamond abrasive
grit electroplated thereon. According to Wiand (see column 1,
lines 50 through 60; column 2, lines 53 through 57; and column 6,
lines 4 through 12), the two-part nature of the assembly permits
worn grinding surfaces to be replaced in an expeditious and cost
effective manner.
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