Air cushion shoe sole
OwnerIng-Chung Huanginventor
Life of this patent
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Abstract
An air cushion shoe sole which is preferably blow molded of elastomeric material and has at least one cavity which in cross-section is substantially rectilinear. The cavity has a number of depressions and each cavity has an air valve for introducing a shock absorbing material, namely gas, liquid, or a combination thereof into that cavity. Each air valve has means in it for automatically bleeding off a portion of the shock absorbing material introduced into the cavity once the pressure of that material reaches a predetermined level.
Claims9
A method of forming an air cushion shoe sole comprising positioning elastomeric material in a split mold, which when it is in closed position, defines at least one substantially rectilinear cavity in cross-section, the cavity having a plurality of depressions, at least the top surface being substantially planar, and having at least one lateral cylindrical space;
- bringing the mold together and molding a hollow air cushion having a shape commensurate with the mold and including a lateral cylindrical shape;
- introducing an air valve in the molded lateral cylindrical shape;
- then introducing a shock absorbing material into said hollow air cushion to pressurize said hollow air cushion;
- and providing means in said air valve for automatically bleeding off a portion of the shock absorbing material in said hollow air cushion once the pressure therein reaches a predetermined level.
Dependencies are inferred from the claim text.