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Ankle foot orthoses known as lower leg walkers

  • US 5,429,588 A
  • Filed: 02/16/1994
  • Issued: 07/04/1995
  • Est. Priority Date: 02/17/1993
  • Status: Expired due to Term
First Claim
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1. An ankle foot orthosis known as a lower leg walker and comprising:

  • a foot platform base comprising;

    a substantially rigid chassis constructed as an open grid structure of the form of a modified right prism or parallelepiped having no entire upper or lower bounding wall and having side-walls which bound a first series of ribs disposed in a longitudinal manner and a second series of ribs disposed in a transverse manner and substantially enclosed within an over-mould formed in a resilient material to produce a shoe shape for supportively accommodating a human foot and incorporating an integral sole for contact with the ground, said sole being provided with a first longitudinally curved profile extending over the forward part of said integral sole and a second longitudinally curved profile extending over the rear part of said sole;

    said second longitudinally curved profile providing progressive rolling contact with the ground during that part of the ambulatory cycle of movement or gait cycle known as heel strike; and

    said first longitudinally curved profile providing rolling contact with the ground during that part of the ambulatory cycle of movement or gait cycle known as toe off;

    said sole thereby providing first and second zones of contact with the ground such that the upper surface of said foot platform base is substantially level when a human patient secured to it, stands still in that part of the ambulatory or gait cycle known as mid-stance; and

    attachment means for securing a pair of upright side-members disposed laterally and medially with respect to said foot platform base; and

    securing means for releasably securing said upright side-members to wrap means for enclosing a human foot, ankle and lower leg; and

    strap means for securing said orthosis to a human foot, ankle and lower leg.

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