Sole construction for shoes

Abstract

A sole construction for shoes is disclosed which includes at least two independently prefabricated wooden parts which are interconnected by at least one foamed polyurethane intermediate part. The interfacing surfaces between the wooden parts and the intermediate part are substantially free from sharp edges and the upper portions of the interfacing surfaces taper gradually arcuately upwardly and outwardly to the marginal areas thereof adjacent the surface supporting the sole of the wearer's foot, said marginal areas terminating in tangential relation with the latter surface without forming a step therewith.

What is claimed is: 
     
       1. A sole construction for shoes, comprising at least two .[.independently.]. prefabricated parts formed of a wood material, said wood parts being interconnected to each other at an area that is located beneath the ball of the foot of the wearer by at least one flexible intermediate part that consists of foamed polyurethane, said intermediate part including a first outer portion located adjacent to the sole of the wearer's foot, a second outer portion located adjacent to the walking surface of said sole and a middle neck portion disposed beneath said first and second outer portions, the width of said intermediate part as measured in the longitudinal direction of said sole being greater at the marginal areas of said first and second outer portions than at the smallest width of said middle neck portion, the interfacing surfaces between said wood parts and said intermediate part being free from sharp edges, the upper portions of said interfacing surfaces tapering gradually arcuately upwardly and outwardly from said middle portion to the marginal areas of said first and second outer portions, and the portions of said interfacing surfaces in the marginal areas adjacent to the surface supporting the sole of the wearer's foot each being tangent to said latter surface without forming a step therewith. 
     
     
       2. A sole construction as claimed in claim 1, the interfacing surfaces between said wood parts and the intermediate part in the marginal area adjacent to the walking surface being tangent to the surface of said wood parts adjacent to the walking surface. 
     
     
       3. A sole construction as claimed in claim 1, the surface adjacent to the sole of the wearer's foot being uncovered. 
     
     
       4. A sole construction as claimed in claim 1, said intermediate part being symmetrically shaped relative to the vertical axis thereof, and extending essentially perpendicular relative to the walking surface and also extending essentially in the longitudinal direction of the sole. 
     
     
       5. A sole construction as claimed in claim 4, protrusions extending from the middle area of said intermediate part essentially in a longitudinal direction of the sole and from opposite sides of said intermediate part, said protrusions being formed integral with said intermediate part. 
     
     
       6. A sole construction as claimed in claim 5, said protrusions being formed with undercuts at the outer ends thereof. 
     
     
       7. A sole construction as claimed in claim 6, the surfaces of said protrusions being connected to the middle area of the intermediate part and defining rounded surfaces therewith. 
     
     
       8. A sole construction as claimed in claim 1, said intermediate part being located parallel to the walking surface which is formed in an arcuate shape. 
     
     
       9. A sole construction as claimed in claim 8, said walking sole being formed integral with said intermediate part.