Appeal No. 2003-0084
Application No. 09/233,583
Simply stated, while Pueschel mentions a pressure increasing
device or "hydraulic aggregate" that can work with a conventional
vacuum booster and which initiates a pressure increasing
operation when the brake operating force has increased to a
pressure threshold value of 30 bar (col. 4, lines 4-9), we find
no correlation between this value and any characteristic of the
vacuum booster in Pueschel and no suggestion that such value is
attained before the boosting limit point of the vacuum booster
and at a point where the boosting ratio of the vacuum booster is
reduced during an increase of the brake operating force. Like
appellants, we find the examiner's conclusions about when the
alleged transition point of 30 bars is reached, or whether it is
affected or unaffected by a vacuum booster limit, to be wholly
without foundation and based on pure speculation. As appellants
have urged on page 3 of the reply brief, since Pueschel describes
the vacuum booster and power brake unit therein as being
"conventional," it is far more likely that boosting by the
"hydraulic aggregate" would not occur until the boosting limit of
the vacuum booster is reached, as in the prior art discussed by
appellants on pages 1-4 of their specification, not before, as
contended by the examiner.
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