Patent ID: 8721733

Claim:
A sleeve for use in a prosthetic joint system, the sleeve comprising: first and second ends, an axial length between the first and second ends, a terraced portion, a fin and an inner wall defining a channel extending between the first and second ends, the channel having a central longitudinal axis; the terraced portion including a plurality of adjacent terraces, each terrace having an outer edge around its perimeter, the outer edge of each terrace lying in a plane substantially perpendicular to the central longitudinal axis of the channel; and the fin including a pair of outer surfaces spaced from each other at a first distance nearest the first end of the sleeve and a second smaller distance nearest the second end of the sleeve to define a wedge shape; wherein: the outer surfaces of the fin are continuous and non-terraced; the fin has a fin edge connecting the outer surfaces of the fin, the fin edge being spaced from the terraced portion of the sleeve; the planes of the outer edges of the terraces are substantially perpendicular to a plane through the fin edge; the planes of the outer edges of a plurality of the terraces extend through the fin edge; the fin edge tapers toward the central longitudinal axis of the channel so that a first distance between the central longitudinal axis and the fin edge nearest the second end of the sleeve is less than a second greater distance between the central longitudinal axis and the fin edge nearest the first end of the sleeve; and the outer surfaces of the fin taper toward the fin edge and toward the second end of the sleeve.