Appeal No. 1998-1533 Page 7
Application No. 08/411,202
leg 32 contains a hydraulic actuation piston 36 which is
located in bore 38 connected to a source of operational fluid.
Piston 36 engages backing plate 40 of the inboard friction pad
42. An indirectly actuated outboard friction pad 44 has its
backing plate 46 connected to outboard leg 30. When hydraulic
fluid is supplied to bore 38 through inlet port 48, piston 36
moves inboard pad 42 into engagement with face 50 on rotor 12
whereupon caliper 28 slides on pins to move backing plate 46
toward rotor 12 causing outboard pad 44 to engage face 52 on
rotor 12. Figure 3 is a table illustrating the measured
natural frequency of the rotor of the disc brake of Figure 1.
Tarter teaches that Figure 4 shows the geometrical
correlation that exists between the footprint 80 of the
friction pads 42 and 44, respectively, and the mode shape
corresponding to five nodal diameters (a-e) and a natural
frequency of 7000 hertz. It can be seen that the footprints 80
of the friction pads 42 and 44 are the same as shown in Figure
4. The footprints subtend an angle equal to that subtended by
a whole number of adjacent nodal diameters, in this case,
three. Tarter states (column 3, line 59, to column 31) that
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: November 3, 2007