Appeal No. 2000-1633 Page 4
Application No. 08/994,159
i.e., all limitations of the claim are found in the reference,
or 'fully met' by it."
Durand discloses a drive sprocket for driving an endless
track of a track-type vehicle. The drive sprocket comprises a
hub having a plurality of circumferentially-disposed teeth on
the
periphery thereof to define a notch between each pair of
adjacent teeth. A U-shaped metallic insert is disposed in
each of the notches and is secured to the hub by retaining
means. A layer of elastomeric material may be disposed
between each of the inserts and the hub to absorb shock loads
imposed on the sprocket during vehicle operation. Each insert
defines a substantially smooth and uninterrupted root profile
or bearing surface thereon adapted to engage a bushing of the
track for track driving purposes. In the embodiment of Figure
7, the drive sprocket 10c includes a hub 17c having inserts
20c cradled in notches 19c defined between pairs of
circumferentially-adjacent teeth 18c. Each insert comprises a
single pair of laterally-spaced tabs 22c each disposed in a
notch 23c formed on a respective outboard side of hub 17c. A
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