Device for measuring force applied to a wearer's foot
Patent 5357696 Issued on October 25, 1994. Estimated Expiration Date: 
October 12, 2013. 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.
October 12, 2013. 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 References 1933243 3702999 3731674 3791375 Load signaling device for a patient's foot Flexible force sensor Flexible force sensor Multi-event notification system for monitoring critical pressure points on persons with diminished sensation of the feet Force sensing insole for electro-goniometer Systems for measurement and analysis of forces exerted during human locomotion InventorsApplicationNo. 134962 filed on 10/12/1993US Classes:36/136, Shoe attachment (e.g., ornament, pocket, etc.)36/137, Light-reflecting or illuminating means73/172, ORTHOPEDIC PRESSURE DISTRIBUTION600/592FootExaminersPrimary: Sewell, Paul T.Assistant: Kavanaugh, Ted Attorney, Agent or FirmForeign Patent References
International ClassA61B 005/11AbstractA device for monitoring force being applied by a wearer thereof to the wearer's foot, as during walking. The device is contained within a shoe-like structure which can be worn by a recuperating injured person or a person recovering from surgery, etc. The device includes a pressure sensitive element that produces an electrical signal that is related to the force, with this signal being used to alert the wearer when a force in excess of a preselected value occurs. Further, this signal can be used as input to data recording and analysis equipment. The signal transmission can be by direct wire connections, or via radio transmission. A vibratory motion is of particular value to alert the wearer of the point where the excess force occurs. The alerting device can be contained within the shoe, or in other apparatus utilized by a patient. Through the use of this device, a recovering patient will know how much weight to place on the leg in order to achieve maximum healing value.Other References
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