Patent ID: 7132032
Filing Date: 2006-11-07
Classification: A43B

Abstract:
1. A method of manufacturing a shoe sole that includes a fluid-filled bladder, the method comprising the steps of: forming an envelope from a first outer layer and a second outer layer of barrier film material sealed along their peripheries; locating a first inner layer of barrier film material between the first outer layer and the second outer layer to define a first fluid layer between the first outer layer and the first inner layer; attaching the first inner layer to the first outer layer to subdivide the first fluid layer into at least two first chambers isolated from fluid communication with each other, at least one of the first chambers extending only partially across a width of the first fluid layer; pressurizing the first chambers with fluids having differing fluid pressures; locating a second inner layer of barrier film material between the first inner layer and the second outer layer to form: that are isolated from fluid communication with each other; pressurizing at least one of the second fluid layer and the third fluid layer with a fluid having a fluid pressure that is different from at least one of the fluid pressures in the first chambers; and incorporating the bladder into the shoe sole.