Appeal No. 2000-0337
Application No. 08/825,449 Page 8
that the hub member is provided with an annular recess with a
ball lodging groove formed on the outer bearing member. Chuta
discloses (col. 4, lines 1-21) that to avoid deformation when
fixing the hub to the outer sleeve 18 of the bearing means 16 by
press fitting or temperature changes after assembly, an annular
recess is formed on the inner peripheral surface of the hub in
correspondence with one of the ball grooves 22 formed on outer
sleeve 18 (figure 1, and col.4, lines 9-11). Similarly, in the
second embodiment (col. 6, lines 47-56) annular recesses 144 and
146 are provided in those sections of the hub member 104 which
correspond to the ball lodging grooves of outer races 118 and 120
so that the thin walled portions of the outer races do not come
in contact with the inner peripheral surface of the hub member
104.
Thus, from this disclosure of Chuta, we find that the
recesses in the hub are placed at the locations of the ball
bearings to prevent deformation during the press fitting
operation or subsequent temperature changes. Turning to figure 2
of AAPA, we find that in the area between the outer bearing race
11 and the hub 14, a space already exists between the hub and the
outer race at the location of the ball bearings. As stated,
supra, Chuta’s purpose of providing the recesses at the location
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