Body function sensor

• US 3,154,067 A
• Filed: 10/11/1961
• Issued: 10/27/1964
• Est. Priority Date: 10/11/1961
• Status: Expired due to Term

• Current Assignee: Arthur J. Stenstrom, Richard L. Walus
• Original Assignee: Arthur J. Stenstrom, Richard L. Walus
• Inventors: Stenstrom, Arthur J., Walus, Richard L.
• Application Number:
  US04/144,387
• Time in Patent Office: 1,112 Days
• US Class Current: 600/500
• CPC Class Codes: A61B 2562/0247 Pressure sensors
• CPC Class Codes: A61B 5/02233 Occluders specially adapted therefor tourniquets A61B17/132
• CPC Class Codes: A61B 5/02444 Details of sensor A61B5/02427 takes precedence

Claims

1. A BLOOD PULSE SENSOR COMPRISING:

(A) A DEFLECTION MEMBER CONSTRUCTED AND ARRANGED TO BE PIVOTALLY SUPPORTED AND DEFLECTED ABOUT ITS CENTRAL TRANSVERSE AXIS, SAID MEMBER EXTENDING LONGITUDINALLY TO DEFINE A LONGITUDINAL AXIS PERPENDICULAR TO SAID TRANSVERSE AXIS;

(B) A STRAIN GAUGE FIXEDLY FASTENED TO SAID DEFLECTION MEMBER SO THAT DEFLECTION OF SAID STRAIN GAUGE IS OBTAINED WHEN SAID DEFLECTION MEMBER IS DEFLECTED THROUGH A SMALL INCREMENT ABOUT SAID TRANSVERSE AXIS;

(C) A FLEXIBLE BAND FASTENED TO SAID DEFLECTION MEMBER FOR HOLDING SAID DEFLECTION MEMBER UNDER MODERATE PRESSURE ALONG ITS LONGITUDINAL AXIS AGAINST A BODY APPENDAGE IN DEFLECTED POSITION, BUT WHERE THE CIRCUMFERENTIAL LENGTH OF SAID FLEXIBLE BAND AND SAID DEFLECTION MEMBER ARE GREATER THAN THE CIRCUMFERENTIAL DIMENSIONS OF SUCH BODY APPENDAGE;

(D) AND ELECTRICAL APPARTUS CONNECTED TO SAID STRAIN GAUGE TO PROVIDE ELECTRICAL SIGNALS REPRESENTATIVE OF A TEMPORARY INCREASED DEFLECTION CAUSED BY A TEMPORARY CHANGE IN APPENDAGE VOLUME DUE TO A SLIGHT RISE IN BLOOD PRESSURE WITHIN AN ARTERY OF SUCH APPENDAGE CREATED BY HEART BEAT ACTION.