Appeal No. 1998-1736
Application 08/282,847
means to achieve the recited arrangement of node and antinode
regions.
In describing the embodiment of Figure 1, the instant
application discloses at page 5, lines 14 to 23, with respect
to standing ultrasonic waves:
An ultrasonic transducer 16 is provided in one side of
the conduit 10. The transducer 16 is directed at a angle
to the horizontal axis 10b of the conduit to create
acoustic standing waves 20 in fluid 17 between the
transducer 16 and a reflective surface 18 provided in the
wall means 12. These standing waves 20 are preferably
emitted at an acute angle with respect to the horizontal
axis 10b of the conduit. The angle is preferably in the
range of 30E - 60E. The ultrasonic generating means in
the form of a transducer 16 and the reflecting surface 18
are provided for creating these standing waves.
Likewise, as to the embodiment of Figure 2 (page 7, lines 13
to
18):
Transducers 16a and 16b generate a plurality of standing
waves 20 at an angle to fluid flow 21. Standing waves 20
urge gas bubbles 15 upward and out of the fluid flow
region. Control means 26a and 26b allow the number of
standing waves 20 to be adjusted to separate gas bubbles
15 having various sizes from fluid 17.
In Figures 1 and 2, the standing waves 20 are shown as lines
which appear to be perpendicular to the common axis of the
transducer(s) 16 and reflector 18, and are at an angle % to
4
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