Appeal No. 2000-0617
Application 08/706,025
balls (13, 14 and 24, 25) for supporting the rotor 8. (Fig.
1).
13. Prior art Fig. 3 of Nagata shows a three ball pivot
bearing 63 at one end and a single ball pivot bearing 61 at
the other end.
14. Prior art Fig. 3 further shows an intermediate
bearing 62.
15. Nagata describes the need to eliminate the
intermediate bearing 62, and does so by replacing the single
ball pivot bearing 61 with a three ball pivot bearing.
(Nagata, column 2, lines 12-19).
The Nakagawa reference
16. Nakagawa describes a bearing structure for a
stepping motor.
17. Nakagawa describes a rotor 1 with a ball 4 at one
end. (Figs. 1-3).
18. The other end of the rotor 1 does not show a ball
pivot bearing. (Fig. 1).
19. The rotor is further supported by intermediate
bearing 2. (Figs. 1 and 4).
20. Nakagawa describes a prior art pivot bearing with
three balls. (Fig. 4).
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Last modified: November 3, 2007