Surgery – Diagnostic testing – Measuring anatomical characteristic or force applied to or...
Patent
1997-10-29
1999-03-09
Hindenburg, Max
Surgery
Diagnostic testing
Measuring anatomical characteristic or force applied to or...
73 81, A61B 500
Patent
active
058793127
ABSTRACT:
In a hardness tester according to the present invention, an indentor is urged by an indentor spring and moves against the indentor spring when pressed against an object part of a living body. The indentor is inserted in a sleeve which is urged by a sub spring weaker than the indentor spring and moves against the sub spring when pressed against the part of the living body. A converter converts an amount of movement of the indentor into an electrical signal. A trigger generates a trigger signal when the sleeve has moved by a predetermined amount. A control unit carries out a process when receiving the trigger signal, the process including steps of: receiving the digital signal from the converter; displaying the amount of movement of the indentor on a display; storing the amount in a memory unit; calculating a difference in hardness of the part of the living body between a relaxed condition and a strained condition; and displaying the difference on the display.
REFERENCES:
patent: 4159640 (1979-07-01), Leveque et al.
patent: 4217912 (1980-08-01), Hubmann et al.
patent: 4331026 (1982-05-01), Howard et al.
patent: 4503865 (1985-03-01), Shishido
patent: 5305633 (1994-04-01), Weissenbacher et al.
Hindenburg Max
Imoto Machinery Co., Ltd.
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