Appeal No. 2000-0581
Application No. 08/429,155
In describing the embodiment of Figures 3a, 3b, wherein a
threaded receptacle 23 is provided, appellant's specification
does not use the language "attaching device." However, the
specification does state on page 6 that
[b]y means of any fastening device such as a screw
28 or the like, the fan blade tips 24 and 25 can be
mounted on fan blade 14. The screw 28 or the like
engages the threaded receptacle 23 provided in the
plastic material as an alternative to the snap-on
device shown in Figs. 2-2b.
These disclosures imply, but do not expressly indicate,
that the attaching device includes cooperating structures on
both the blades and the blade tips.
With regard to the "aligning means" limitation,
appellant's specification discloses, in the first and second
embodiments, an aligning pin 19 on the tip. Presumably the
aligning pin is to be aligned with an associated recess on the
blade. Thus, the aligning means also appears to include
structures on both the blades and the blade tips.
With regard to the embodiment of Figures 4-4b,
appellant's specification describes an arrangement wherein one
of a cam and a recess is disposed on the tip and the other of
the cam and recess is disposed on the blade, but does not use
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