Load signaling device for a patient's foot
Patent 3974491 Issued on August 10, 1976. Estimated Expiration Date: 
August 10, 1993. 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 10, 1993. 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 1824663 2558805 2972132 3305036 3699398 3702999 3791375 InventorAssigneeApplicationNo. 490313 filed on 07/22/1974US Classes:340/573.1, Human or animal177/209, Interconnected load-supporting expansible chamber177/245, COMBINED177/46, In unbalance200/85R, WEIGHT200/86.5, FOOT OPERATED33/3A, Single measuring or indicating means340/666, Weight36/137, Light-reflecting or illuminating means36/139, Noise maker482/51, INVOLVING USER TRANSLATION OR PHYSICAL SIMULATION THEREOF482/8, Monitors exercise parameter600/592, Foot73/172ORTHOPEDIC PRESSURE DISTRIBUTIONExaminersPrimary: Caldwell, Sr., John W.Assistant: Wannisky, William M. Attorney, Agent or FirmAbstractA device for signaling a patient when a predetermined load is placed on the patient's foot comprises a resilient foot pad having a toe end and a heel end and adapted to substantially cover the inner sole of a shoe. A resilient liquid filled tube is mounted within the pad with the tube extending from adjacent the toe end to adjacent the heel end of the pad. A signaling device is controlled by a pressure responsive means in communication with the liquid in the tube for the actuation of the signaling means at a predetermined pressure of said liquid. | |
