High resolution pressure sensing device having an insulating flexible matrix loaded with filler particles
Patent 6073497 Issued on June 13, 2000. Estimated Expiration Date: 
August 5, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 5, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesPattern recognition system Pressure sensitive switch structure Pressure sensitive conductor Coordinate input apparatus Tactile sensing transducer Patent #: 5060527 InventorsApplicationNo. 906583 filed on 08/05/1997US Classes:73/862.68By measuring electrical propertiesExaminersPrimary: Fuller, Benjamin R.Assistant: Thompson, Jewel V. Attorney, Agent or FirmForeign Patent References
International ClassG01L 001/16AbstractA high-resolution pressure-sensing device is disclosed. The device includes an insulating flexible matrix having a plurality of filler particles. Application of a force to the matrix causes compression of the matrix. This results in the filler particles occupying a greater amount of space within the matrix relative to when no force is applied. A detector attached to the matrix detects or measures the volume of the filler particles relative to the volume of the matrix, and therefore determines the force applied to the matrix. Preferably, the resistivity of the matrix is inversely proportional to the volume percent of the filler particles, in which case the detector is a resistance-measuring circuit.Other References
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