US 2014/0173931 A1Published application

Adjustable spring device f0r walking and running

OwnerSergey V. KRUGLOVinventor

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Abstract

An adjustable spring device for walking and running is attachable to the user's footwear. The device includes —an upper sole coupled to the footwear, —a lower elastic sole, and —a support bracket configured as a curvilined confined band that includes a flat top fastened to the upper sole, and a concaved bottom fastened to the lower sole. The lower sole is furnished with a plurality of slots, preferably straight-lined, and aligned at a predetermined angle, cut from the periphery towards the longitudinal axis of lower sole and ending at predetermined points thereof. The slots are preferably so arranged that, if the predetermined points are linked by four straight lines extending therethrough, the four lines will form a rhomb-shaped figure having two vertexes positioned at the front and the rear ends of the lower sole. Means for variable adjustment of the support bracket are provided, creating comfortable energy exchange conditions.

Claims6

Dependent claims

An adjustable spring device usable by a user for walking and running, said device is associated with the user's footwear, said device comprising:

an upper sole of a predetermined stiffness attached to or integrated into the footwear;
a lower sole of a predetermined elasticity, situated below the upper sole, the lower sole includes a central longitudinal axis, a periphery, a front end located on said central longitudinal axis and on said periphery at the very front point of said lower sole, and a rear end located on said central longitudinal axis and on said periphery at the very rear point of said lower sole;
a support bracket configured as a curvilined confined band of a predetermined stiffness, the support bracket includes a flat top and a concaved bottom, wherein the flat top is fitted and fastened to the upper sole, whereas the concaved bottom is fastened to the lower sole;
wherein said lower sole is furnished with a plurality of slots, wherein each said slot is cut from the periphery towards the central longitudinal axis and ending at a predetermined point of said lower sole.

1 more element

Dependencies are inferred from the claim text.