Appeal No. 2005-2035 Page 5
Application No. 10/281,417
end. Since acoustic reflector 28 continuously rotates, acoustic signal 36 continuously
rotates. Echoes from each angular position are collected, processed and displayed on
a CRT screen.
Lochner's invention relates to a pasty damping medium for damping mechanical
and/or acoustic vibrations, based on a liquid phase and at least one finely-divided solid
material. Lochner teaches (column 5, line 64, to column 6, line 2) that:
The damping media according to the invention are suitable for
hydraulically-operating damping devices, especially as media for engine
bearings, wheel dampers, impact absorbers, steering dampers, shock absorbers,
devices for rail vehicles and aeroplanes, vibration absorbers of all kinds, seat
dampers and for vibration-free bedding of machines.
Lochner teaches that a polyglycol having a viscosity of at least 20 mm2/s at 50° C. is
used as basic material for the liquid phase. The liquid phase has added to it solids
which make up 20 to 80% by weight, based on the total weight of the damping medium.
If there is less than 20% by weight of solid material, the damping medium has too low a
viscosity, so that it can hardly be used as an effective damping medium. If more, than
80% by weight of solid material is used the resulting substance is so firm that the flow
property is impaired. The paste-like damping media has a viscosity of about 100000 to
4X106 mPa s, in particular of about 150000 to 3X106 mPa s at 18° C.
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