| 摘要 |
<p>A pyramidal link plate assembly for coupling a prosthetic limb upright assembly to another prosthetic limb component includes a base plate member (38) having a dome extending from a distal end, and a cavity opening (60) onto a distal apex of the dome, where the cavity includes a conically shaped portion with a diameter that widens with the distance from the distal apex of the dome; and a rotatable member (57) which includes a substantially conically shaped body (42) positioned within the conical portion of the cavity, and which includes a frusto-pyramidal boss (40) extending distally therefrom out through the opening in the distal apex of the dome. The conically shaped body of the rotatable member, positioned within the cavity, also widens with the distance from the distal apex of the dome. The boss is adapted to be received within a central opening of a conventional annular coupling socket. Set screws that extend radially into the central opening of the coupling socket are angled sightly distally so that when the set screws abut the outwardly angled faces of the frusto-pyramidal boss, further tightening of the set screws acts to pull the boss component in the distal direction, and thereby causing the outer conical surface of the rotatable member's conically shaped body to press against the inner conical surface of the cavity. Accordingly, when the set screws are tightened, surface friction between the two complimentary conical surfaces prohibits further rotation of the rotatable member within the base plate member.</p> |
