Adjustable arch support orthosis including variably tensioned arch curve and method of utilizing orthosis

A foot support orthosis including an arch support brace having an arch curve being variably tensioned during use, the foot support orthosis being fittable underneath the foot and being sized and shaped to be removably placed proximal a foot supporting surface of a foot enclosure worn by a user, comprising:

• an orthosis being sized for support of the foot from underneath about the metatarsal bones of the foot, to underneath about the calcaneus bone of the foot, said orthosis having a first surface being contoured for support of the foot, having a second surface being downwardly faced for contact with the foot supporting surface of the shoe, and having a medial side and a lateral side on opposed sides of a central longitudinal midline of said orthosis;
• a forefoot portion of said first surface being arcuately shaped to be positionable underneath the metatarsal bones of the foot;
• a heel portion of said first surface being arcuately shaped to be positionable underneath the calcaneus bone of the foot;
• a medial longitudinal arch curve proximate said medial side of said orthosis, said medial longitudinal arch curve being shaped to be positionable underneath the arch of the foot, said medial longitudinal arch curve having an upper surface being curved upwardly along a crown portion, said medial longitudinal arch curve including:
• an anterior slope being inclined from said upper surface of said medial longitudinal arch curve toward said forefoot portion of said orthosis;
• a posterior slope being inclined from said upper surface of said medial longitudinal arch curve toward said heel portion of said orthosis;
• and
• a medial slope being inclined from said upper surface of said medial longitudinal arch curve toward said lateral side of said orthosis;
• and
• said anterior slope having an anterior base of a first thickness, said posterior slope having a posterior base of a second thickness, said crown of said medial slope having a third thickness along said upper surface of said medial longitudinal arch curve, said medial side of said medial longitudinal arch curve being disposed in a continuous arched curve along a length dimension of said medial side;
• means for tensioning said medial longitudinal arch curve, said means for tensioning connectable between an underside portion of said anterior slope and an underside portion of said posterior slope, said means for tensioning having means for adjusting manipulated by the user for adjustment of said means for tensioning between a neutral length, a decreased length, and an extended length between said anterior slope and said posterior slope, said means for tensioning including:
• an anterior bracket being L-shaped, said anterior bracket having a distal portion being connected under said anterior slope proximal to said medial side, said anterior bracket having a proximal portion extended downwardly from said anterior slope;
• a posterior bracket being L-shaped, said posterior bracket having a distal portion being connected under said posterior slope proximal to said medial side, said posterior bracket having a proximal portion extended downwardly from said posterior slope;
• an anterior linkage aligned with said anterior bracket, said anterior linkage having a distal end pivotably connected with said proximal portion of said anterior bracket, said anterior linkage having a proximal end disposed underneath said crown portion of said medial longitudinal arch curve;
• a posterior linkage aligned with said posterior bracket, said posterior linkage having a distal end pivotably connected with said proximal portion of said posterior bracket, said posterior linkage having a proximal end disposed underneath said crown portion of said medial longitudinal arch curve;
• and
• said means for adjusting the neutral length between said distal end of said anterior linkage and said distal end of said posterior linkage, said means for adjusting having opposed ends being disposed to accept therein respectively said proximal ends of said anterior linkage and said proximal linkage, said means for adjusting being manipulated by the user;
• whereby said anterior linkage and said posterior linkage are retracted into respective opposed ends of said means for adjusting by manipulation thereof, the neutral length between said respective distal ends is shortened to said decreased length, said anterior and posterior linkages engage respective proximal portions of said anterior bracket and said posterior bracket, thereby respective anterior and posterior brackets pivot inwardly, thereby pulling said underside of said anterior slope and said posterior slope toward each other and increasing the tension along said medial longitudinal arch curve;
• whereby when each of said anterior linkage and said posterior linkage is extended from said means for tensioning by manipulation of said means for adjusting, the neutral length between said respective distal ends is lengthened to said extended length, thereby each distal end extends against said respective proximal portions of said anterior bracket and said posterior bracket which pivot against the underside of said anterior slope and said posterior slope, thereby pushing said underside of said anterior slope and said posterior slope apart and reducing the tension of said medial longitudinal arch curve, with resulting decrease in the stiffness of said arch curve for reduced support of the arch of the user's foot;
• whereby said medial longitudinal arch curve being tensioned by prior manipulation of said means for adjusting by the user, said arch curve is further tensioned intermittently during each foot-strike by force being transferred by the user's foot from said heel portion and on to said medial longitudinal arch curve of said orthosis, thereby the tension along said medial longitudinal arch curve is intermittently increased without significantly decreasing the height of the arch curve thereby supporting the arch of the user's foot while said crown portion of said medial longitudinal arch curve flexibly rebounds to an unweighted position by force being transferred by the user's foot from said medial longitudinal arch curve and on to said forefoot portion of said orthosis during each foot-strike by the user wearing said orthosis.