Self-ventilating device for a shoe insole
Patent 5068981 Issued on December 3, 1991. Estimated Expiration Date: 
November 30, 2010. 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.
November 30, 2010. 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 337146 2442026 Toe ventilating pneumatic shoes Footwear having ventilation and shock-absorbing properties Patent #: 4860463 InventorApplicationNo. 619994 filed on 11/30/1990US Classes:36/3R, Ventilated36/3B, Soles36/7.8, Spring36/29, Pneumatic36/35B, Pneumatic36/38Metallic springExaminersPrimary: Sewell, Paul T.Assistant: Patterson, M. D. Attorney, Agent or FirmForeign Patent References
International ClassesA43B 007/06A43B 013/20 A43B 021/30 Foreign Application Priority Data1990-10-27 KRAbstractA self-ventilating device for a shoe insole, which includes a heel chamber body having a spring disposed therein, an inlet valve having a plurality of sole aperture for communicating with a plurality of channels in the sole portion of the shoe insole, and a pair of outlet valves disposed in both side walls thereof for communicating to the atmosphere, whereby when each step is taken by the shoe user, a moisture and odor waste quantity of air is forced from the channels in the sole portion through the inlet valve to the heel chamber body when the pair of outlet valves are closed and expelled through the pair of outlet valves to the atmosphere automatically when the inlet valve is closed. | |
