Surgery – Instruments – Cutting – puncturing or piercing
Reexamination Certificate
2008-07-01
2008-07-01
Jaworski, Francis J. (Department: 3768)
Surgery
Instruments
Cutting, puncturing or piercing
Reexamination Certificate
active
07393356
ABSTRACT:
In an ultrasonic operation apparatus according to the present invention, in order to detect the initial resonance frequency (Fro) promptly once a foot switch is pressed, under the control of a sweeping speed control circuit, the D/A converter D/A converts 8-bits of signals (phase difference amount signal Δθ) representing the amount of the phase difference detected by the phase comparator, and the output of the D/A converter is output to a VCO so as to become a clock for a sweep circuit. When a phase difference amount between θi and θv is large and a drive frequency setting signal (Fs) is far from Fro, the sweeping speed for Fro detection is increased. When a phase difference amount between θi and θv is small and Fs is close to Fro, the sweeping speed for Fro detection is decreased.
REFERENCES:
patent: 6678621 (2004-01-01), Wiener et al.
patent: 2002-45368 (2002-02-01), None
patent: 2002-177292 (2002-06-01), None
Jaworski Francis J.
Olympus Corporation
Scully , Scott, Murphy & Presser, P.C.
LandOfFree
Ultrasonic operation apparatus for detecting initial... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ultrasonic operation apparatus for detecting initial..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic operation apparatus for detecting initial... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2797199