Patent ID: 6375682
Filing Date: 2002-04-23
Classification: A61B,A61F

Abstract:
A collapsible, rotatable and expandable spinal hydraulic prosthetic device comprising:a pair of opposed vertebra engaging members, each having a first vertebra engaging surface for joining said vertebra engaging member to a vertebra and having a second bearing surface; a pair of thrust bearing members, each having a radial bearing assembly, said pair of radial bearing assemblies being fixedly secured to said vertebra engaging members, each of said members being contiguous and rotatable with respect to said second bearing surfaces; a pair of collapsible, extendable bellows, each having an end cap formed on a first end thereof, said end cap having a bearing recess formed therein, said bearing recess receiving said radial bearing assembly of said thrust bearing member, said thrust bearing member being contiguous and rotatable with respect to said end cap; and, a base plate member having opposed annular surfaces, each of said annular surfaces being fixedly secured to a second end of said collapsible, extendable bellows, said base plate member having a fluid channel formed therethrough for allowing said bellows to be filled with a fluid.