Plastic bellows inserted into soles
October 10, 2020. 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 1568405 Footwear having improved shock absorption Inflatable sole construction Shoe sole having compressible shock absorbers Self-ventilating device for a shoe insole Shoe with pneumatic inflating device Shoe with sole including hollow space inflatable through removable bladder Shoe with inflatable height-adjustment cushion Shock absorbing system for human feet Footwear with a sole provided with a damper device InventorAssigneeApplicationNo. 686340 filed on 10/10/2000US Classes:36/29PneumaticExaminersPrimary: Kavanaugh, TedAttorney, Agent or FirmForeign Patent References
International ClassA43B 013/20Foreign Application Priority Data1999-10-21 MTAbstractA plastic bellow system inserted into the sole of a shoe. The system having a first pair and a second pair of side-by-side plastic bellows in the forward portion and the rear portion of the shoe sole. The bellows placed in hollows formed in a midsole. The first pair of bellows having two convolutions with an opening formed in the lower convolution. The second pair of bellows having three convolutions with an opening formed in the lower convolution. A pneumatic valve associated with each bellows and the exterior of the midsole. The user can modify foot position by operating the valve of each bellows of the first and second pair of plastic bellows to inflate or deflate each bellows to thereby modify the volume of each bellows. | |
