Appeal No. 2004-1109
Application No. 09/754,686
OPINION
The examiner finds that Campau discloses a master cylinder
12, reservoir 20, gas-filled emulator 31, and a spring emulator
26b (Paper No. 7, page 2). The examiner recognizes that Campau
fails to disclose the details of the master cylinder, that the
specific gas-filled emulator may be a gas-filled bellows
emulator, and that the emulators may be integral with the master
cylinder (id. at pages 2-3). Therefore the examiner applies the
Complete Car Care Manual for its teachings that a standard master
cylinder in a hydraulic brake system contains two pistons, each
with a seal, and corresponding first and second chambers and
bypass ports (id., paragraph bridging pages 2-3).3 The examiner
also applies Sasaki for the teaching of a bellows type
accumulator, noting that Campau discloses that the accumulator,
which is structurally similar to an emulator, can be a bellows
type (id. at page 3). Finally, the examiner applies Feigel for
the teaching of a “brake-by-wire” system with a spring type
travel simulator integral with the master cylinder (id.). From
these findings, the examiner concludes that it would have been
obvious to one of ordinary skill in this art at the time of
3Campau discloses that the master cylinder is preferably a
tandem master cylinder having two service pistons (col. 3, ll. 6-
10, and col. 20, ll. 38-42).
4
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