Shoe and foot prosthesis with bending beam spring structures
Patent 6029374 Issued on February 29, 2000. Estimated Expiration Date: 
May 28, 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.
May 28, 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 ReferencesInventorsApplicationNo. 864467 filed on 05/28/1997US Classes:36/27, Spring heel36/7.8, Spring36/38, Metallic spring36/92, Heel support36/151, Including metal spring means36/158, By spring placement36/168, Including metal spring means36/179, Including metal spring means623/55ResilientExaminersPrimary: Sewell, Paul T.Assistant: Stashick, Anthony Attorney, Agent or FirmForeign Patent References
International ClassesA43B 013/18A43B 021/30 A43B 021/32 A61F 002/66 AbstractA midsole system for a running shoe or foot prosthesis have a sole spring, a heel spring and/or a forefoot spring stores energy of foot impact and releases it during the running cycle. A preferred embodiment provides bending beam sole systems for shoes or foot prostheses comprising a bending beam heel spring, a bending beam forefoot spring, a two coupled spring sole system, and a three coupled spring sole system. The sole systems of this invention maximize stability, cushioning, and walking or running economy.Other References
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