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Pocket-size electronic cuffless blood pressure and pulse rate calculator with optional temperature indicator, timer and memory

  • US 4,320,767 A
  • Filed: 04/07/1980
  • Issued: 03/23/1982
  • Est. Priority Date: 04/07/1980
  • Status: Expired due to Term
First Claim
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1. A cuffless electronic blood pressure device including a non-circumferentially engaging pressure applying means, transducer means responsive to the compression degree of the said pressure applying means, acoustical sensor means coupled to said pressure applying means for detecting pulse rate or heart rate sounds and producing an electrical signal in response thereto, systolic signal producing means coupled to said acoustical sensor means for producing a signal representing the systolic pressure of the user, diastolic signal producing means coupled to said acoustical sensor means for producing a signal representing the diastolic pressure of the user, the systolic and diastolic signals produced being an analog representation coordinated to the analog representation of the degree of compression and decompression of the subjected tissues by the non-circumferentially engaging pressure applying means, converting means for changing said analog representation of the systolic and diastolic signals to digital visual displays thereby indicating the respective systolic and diastolic pressure of the user.

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