Patent ID: 6684531
Filing Date: 2004-02-03
Classification: A43B

Abstract:
A space shoe comprisinga p-diamond sole, a compression limiting mechanism to limit the compression of said p-diamond sole, and a foot attachment means to attach said p-diamond sole to the foot of a wearer, wherein said p-diamond sole is a compressible structure, called a p-diamond, comprising an upper frame, a lower frame, one or more a p-diamond linkages each of which comprises eight links further comprising four diamond links, two end links, a top length link, a center length link, a bottom length, link wherein said nine links are hingeably connected by link hinges, wherein said top length link is rigidly attached to said upper frame, and said bottom length link is rigidly attached to said lower frame, wherein the four said diamond links are hingeably interconnected by said link hinges to form a diamond shape, with two top links and two bottom links wherein two diamond links with one bottom link, are called outside diamond links because they face away from the center of said p-diamond and the other two diamond links are called inside diamond links, wherein the two outside diamond links must be equal in length and the two inside diamond links must be equal in length with each other and with the two said end links, wherein a top link hinge connecting the top two said diamond links is hingeably connected to said top length link, wherein a bottom link hinge connecting the bottom two said diamond links is hingeably connected to said bottom length link, wherein the two said outside diamond links are hingeably connected by a link hinge called the outside link hinge, and the two inside diamond links are hingeably connected by a said link hinge called the inside link hinge, wherein said top length link is also hingeably connected to one of said end links, and said bottom length link is also hingeably connected to the other one of said end links, wherein said end links are hingeably interconnected by a link hinge called the end center link hinge, wherein said center length link is connected to said inside link hinge and said end center link hinge, wherein the overall configuration of said eight links of said p-diamond linkage is two parallelograms and a diamond which overlap one another and which is why the invention is referred to as a p-diamond, wherein the two said outside diamond links constrain said p-diamond to compress in such a manner that said top length link remains parallel to said bottom length link which means said p-diamond compresses without tilting.