Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Reexamination Certificate
2004-04-23
2009-06-16
Fitzgerald, John (Department: 2856)
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
C073S861270, C600S407000
Reexamination Certificate
active
07546776
ABSTRACT:
A leak detector sequentially emits pulse signals toward a human body at a position at which a needle is inserted, detects pulse signals reflected inside of the human body, and measures a time interval between the emission and the detection for each of the pulse signals. Then, the leak detector calculates the difference between the measured interval and a predetermined time interval, and generates a leak warning for notification when the difference exceeds an acceptable range. Since a swelling on the surface of the human body causes a path of the pulse signal to extend, the leak detector can detect, based on the extended signal path, that the needle has come off a blood vessel.
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Fitch Even Tabin & Flannery
Fitzgerald John
Nemoto Kyorindo Co., Ltd.
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