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Hardness tester for living body

  • US 5,879,312 A
  • Filed: 10/29/1997
  • Issued: 03/09/1999
  • Est. Priority Date: 11/08/1996
  • Status: Expired due to Term
First Claim
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1. A hardness tester for a living body, comprising:

  • a) an indentor which is urged by an indentor spring and moves against the indentor spring when pressed against a part of the living body;

    b) a sleeve in which the indentor is inserted and 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;

    c) a converter for converting an amount of movement of the indentor into an electrical signal;

    d) a trigger for generating a trigger signal when the sleeve has moved by a predetermined amount; and

    e) a control unit for carrying out a process when receiving the trigger signal, the process including steps of;

    receiving the electrical 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.

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