Abstract:
A shoe construction for supporting an inner sole providing a plurality of spaced-apart pedestal sole support areas. Each pedestal support area is partially stabilized by adjacent supporting walls which walls have reduced height areas close to the support area. Partial stability provides adequate support for the active shoe wearer while at the same time permitting the pedestal support areas to move within a limited area or orbit.

Description:
BACKGROUND OF THE INVENTION 
     Numerous sole support structures have been suggested including a pattern of vertical support walls (U.S. Pat. No. 4,449,307) and configured web units (U.S. Pat. No. 5,337,492). 
     SUMMARY OF THE INVENTION 
     Broadly, the present invention comprises a shoe construction in which the inner sole is supported by a matrix of pedestals including a plurality of spaced-apart pedestal inner sole support areas. The pedestals are normally distributed throughout the underside of the inner sole configuration to provide sole support. Each pedestal area is supported and braced by support walls which have reduced height portions adjacent each pedestal to permit each pedestal area to move in numerous directions during shoe use including in a circular orbit about the pedestal&#39;s vertical axis. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a plan view of the shoe construction of the present invention; 
     FIG. 2 is a sectional view along line 2--2 of FIG. 1; 
     FIG. 3 is a sectional view along line 3--3 of FIG. 1; 
     FIG. 4 is a perspective view of an alternative sole support matrix including four longitudinal rows of pedestals; 
     FIG. 4a is a partial plan view of the matrix with an inner pedestal area of FIG. 4; 
     FIG. 4b is a partial plan view of the matrix with an outer pedestal area of FIG. 4; 
     FIG. 4c is a top view of an alternative pedestal area which is rectangular in shape; 
     FIG. 5 is a perspective and exploded view of a row of the support matrix and inner sole layers; and 
     FIG. 6 is a row of the support matrix deformed by the forces exerted on the shoe soles and support matrix when in use. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     In FIGS. 1-4, shoe 10 includes upper shoe portion 11 and outer sole 13 including arch 13a. Positioned on outer sole 13 is inner sole support web matrix 16 including heel section 17 and forward section 19. Web matrix 16 is made of rubber or other resilient material. 
     Support matrix heel section 17 includes longitudinal upright support walls 21, 22 and cross support walls 23a-g. Walls 21, 22 and 23a-g have lower surfaces 31 and top sole-support surfaces 33 which define their heights (h) (FIGS. 2 and 4). The height of walls 21, 22 and 23a-g are reduced at selected locations by openings 35 which are preferably V-shaped with lowest points 35p (FIG. 2). Other opening shapes may be used. Walls 21, 22 and 23a-g intersect to form surfaces 33 which are outer T-shaped pedestal areas 25a-d and cross shaped pedestal areas 27a-l. The cross pedestal areas and T-shaped areas provide support of inner soles 39a-c (FIG. 5). Support walls 21, 22 and 23a-g have height-reducing openings 35 which create support pyramid-shaped pedestals 37 with each pedestal 37 having a pedestal shoe support area 25a-d or 27a-l. The heel section of the shoe 10 (FIG. 1) has two longitudinal walls 21, 22 while the alternative matrix has four (4) longitudinal walls (FIG. 4). Any number or size of longitudinal and cross support walls may be used in the heel or toe section of the shoe. 
     Support matrix forward section 19 is constructed similarly to heel section 17 except support walls intersect at non-right (oblique) angles a and b. Support walls have less height in the toe section and openings 35 are shallower. 
     In FIG. 4a cross pedestal support seat area 27d consists of two intersecting rectangles r 1  and r 2 . Vertical axis (V) passed through pedestal 37. Pedestal 37 includes that portion of the walls adjacent the sole support area down to opening lowest points 35p. Also shown in FIG. 4a is circle C illustrating an area of movement that the pedestal top 37t and the vertical axis (V) passing therethrough and terminating in the support area plane may move through in shoe use as pedestal 37 torques, bends, twists, moves and otherwise deforms. T-shaped pedestal area 25a (FIG. 4b) and rectangular pedestal area 30 (FIG. 4c) are additional pedestal area shapes. Area 30&#39;s shape is created by having openings 35 positioned nearer the center (vertical axis (V)) of pedestal 37. 
     Turning now to FIGS. 5 and 6, a row of pedestals 37 is shown with deformation of the outer pedestal 37 less than the inner pedestal 37 with the variation in pedestal compressed height creating a curvature line (X) passing through or adjacent L-shaped pedestal sole support areas 28 and T-shaped sole pedestal support areas 25a. Forces F v  are the forces downward and F a  are the forces downward with horizontal components. Forces F 1  and F 2  are the forces exerted by pedestals 37 and openings 35 to withstand the downward forces. 
     In the operation of shoe 10 of the present invention, the wearer of the shoe places weight on the shoe by standing, walking or otherwise moving , which weight and forces are created by and are associated with such loading, movement, acceleration and deceleration of such wearer&#39;s illustrated by forces F v , F a , F 1 , F 2 , etc. (FIGS. 5 and 6). Support matrix 16 including pedestals 37 and their pedestal support seat areas 27a-l and areas 25a-d which areas support one or more shoe soles 39a-c. Lateral forces resulting from walking, running and stopping cause pedestal areas 25 and 27 to bend, compress and otherwise distort causing one or more pedestal vertical axes (V) to move in an orbit approximated by circle (C) (FIG. 4a). Axis (V) extends through pedestal 37 from lower surface 31 to upper surface 33. Sole 39a is preferably attached to sole support areas 33 including support areas 25a-d, 27a-l, 30 or other shaped sole support areas by adhesive or otherwise. Alternatively, sole 39a may rest on support areas 33 without attachment. Soles 39a-c may be attached to one another or may not be so attached. Attachment of sole 39a to areas 33 and attachment of one or more soles adds relative stability to pedestals 37. 
     The matrix construction of the present invention provides partial stability with the pedestals 37 permitting some movement of the areas 33 side-by-side, back and forth or a limited orbital area such as the circle (C) of FIG. 4a. By varying the number of supporting walls and their height adjacent the support areas, the relative stability of each pedestal is controlled.