Appeal No. 2003-0084
Application No. 09/233,583
As noted on page 1 of the specification, appellants'
invention relates to a braking system for an automotive vehicle,
which is equipped with a vacuum booster, and more particularly to
a vehicle braking system capable of preventing a reduction in
braking effect due to reduction in the boosting function of the
vacuum booster. Even more specifically, appellants' braking
system includes a vacuum booster having a transition point at
which a boosting ratio of the vacuum booster is reduced during an
increase of the brake operating force before a boosting limit
point at which the booster has become inoperable to perform its
boosting function is reached, the transition point being kept
unchanged irrespective of a change in the pressure in the
negative-pressure chamber of the booster. The system further
includes a pressure increasing device, including a second
hydraulic pressure source, wherein the pressure increasing device
initiates a pressure increasing operation when the brake
operating force has increased to the transition point.
Independent claim 1 is representative of the subject matter on
appeal and a copy of that claim can be found in the Appendix to
appellants' brief.
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