Appeal No. 96-0323
Application 08/131,684
such an estimate can be very inaccurate, and that there can be
a large difference between wheel speed and actual vehicle
speed. Column 1, lines 40-45. As a solution to that problem,
Kageyama suggests using a pseudo speed based not only on wheel
speed sensors but also on an acceleration sensor. Column 2,
lines 1-6. The pseudo speed is further adjusted for
controlling the anti-lock braking system at low vehicle
speeds. Column 2, lines 7-14.
Thus, the combined teachings of the prior art would have
suggested the desirability of borrowing the ABS pseudo speed
signal (as in Kageyama) as the speed signal needed to control
the power steering (as in Shimizu).
Nishikawa was not applied to Claims 1-4, 6-7, and 10-11,
and is unnecessary to our decision on those claims. However,
Nishikawa confirms that the skilled artisan was motivated to
share pseudo speed data among the various systems in a vehicle
that need vehicle speed data, including the ABS system 11 and
the power steering system 25, in order to provide for more
reliable control. Column 1, lines 33-57; Figure 1(b).
Moreover still, Nishikawa’s Figure 1(b) appears to show
all of the elements of the claimed invention, considering the
4
Page: Previous 1 2 3 4 5 6 7 Next
Last modified: November 3, 2007