US Patent 5,119,831
United States Patent and Trademark Office
University of Iowa Research Foundation (Oakdale, IA, US)
A portable pressure detecting device is provided employing a fluid-filled bulb of a suitable size to fit within the mouth of a person to sense pressure generated within the mouth. In addition, a fluid-filled bulb of a suitable size to fit within the hand of the person serves to sense pressure generated by the hand. A transducer is alternatively connectable with each bulb for converting the pressure sensed by the connected bulb to an electrical signal representing the sensed pressure. A pressure comparator circuit is responsive to the electrical signal for comparing the sensed pressure to a selected predetermined pressure level for producing an output indicating the proportion of the sensed pressure relative to the predetermined pressure level. A peak pressure detection circuit is responsive to the electrical signal for detecting the peak pressure sensed by the bulb. An LCD display selectively displays the sensed moment-to-moment pressure, the peak pressure, or the selected predetermined pressure level. An LED display selectively displays the proportion of the sensed pressure relative to the predetermined pressure level.
Robin, Donald A. and Luschei, Erich S. System and method for detecting pressure of selected body parts. US Patent 5,119,831 filed January 11, 1991 and issued June 09, 1992. https://ir.uiowa.edu/patents/93