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US 4,364,189 AGranted
Running shoe with differential cushioning
OwnerBarry T. Batesinventor
Life of this patent
Estimating the term…
Abstract
A sports running shoe constructed to minimize impact shock and to maximize lateral stability. The shoe's midsole is formed with a medial layer portion having one overall firmness, and a lateral layer portion having a lesser overall firmness.
Claims5
Sole means in a sports shoe for absorbing shock on impact, and for producing lateral foot stability when the shoe is used for running, said means comprising
- a heel section formed of a resilient material whose overall firmness on the inner side of a longitudinal heel midline axis is greater than that on the outer side of said midline axis, and
- a forefoot section formed of a resilient material whose overall firmness on the outer side of a longitudinal forefoot midline axis is substantially the same as that on the outer side of said heel midline axis in said heel section.
Sole means in the heel region of a sports shoe for absorbing shock on impact, and for producing lateral foot stability when the shoe is used for running, said means comprising
- a first elastomeric slab portion having one density and having its mass distributed primarily on the medial side of the midline axis in such heel region, and
- a second elastomeric slab portion having another density which is less than said first density and having its mass distributed primarily on the lateral side of said midline axis.
Dependencies are inferred from the claim text.