Appeal 2006-2825
Application 10/691,916
electromagnet 44 can be generated by an emergency stop device which is
not shown. It ascertains whether there is a malfunction or power failure”
(Specification 5:12-14).
FF2. Toomey discloses two conventional dual master cylinders 6, 15 each
connected, via Tee valves 22 and threaded connections 28, to the wheel
cylinders 29 of each of the four hydraulic brakes (Toomey, col. 2, ll. 1-23
and 59-60).
FF3. Master cylinder 6 is actuated by brake pedal 5 and master cylinder 15
is actuated by emergency brake 14, which may be either a hand brake or a
foot brake (Toomey, col. 2, ll. 3-5 and 13-17).
FF4. Toomey’s threaded connection 28 is threaded into a threaded bore of
leg 27 of Tee valve 22 (Toomey, Fig. 3) and connects Tee valve 22 to wheel
cylinder 29 (Toomey, col. 2, ll. 59-60, Figs. 2 and 3). The threaded
connection 28 is a braking conduit to which both master cylinder 6 and
emergency master cylinder 15 are connected, via Tee valve 22.
FF5. Toomey does not teach or suggest actuation of either master cylinder
6 or 15 by an electric magnet.
FF6. Kessler discloses an electromechanical hydraulic trailer braking
system for towed vehicles such as trailers (Kessler, col. 1, ll. 4-8). In
Kessler’s system, the powered vehicle 10 is provided with an electrical
control means 14 capable of receiving an input signal 16 indicative of the
need to engage or disengage braking means in a towed vehicle 12 (Kessler,
col. 4, ll. 3-9). Input signal 16 may be taken from the position or motion of
the brake pedal or master cylinder piston rod of powered vehicle 10 or may
be generated manually (Kessler, col. 4, ll. 10-15).
5
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Last modified: September 9, 2013