Patent ID: 6572657
Filing Date: 2003-06-03
Classification: A61F

Abstract:
A prosthetic lock assembly for interconnecting a liner for a prosthetic socket with a prosthesis, comprising:a thermoforming plate having a central bore formed therein, said central bore having a longitudinal axis substantially coincident to a longitudinal axis of said prosthetic socket liner; an elongate latching pin adapted to be slidingly received within said central bore, said elongate latching pin having a plurality of closely spaced apart, annular ratchet means formed therein along the length thereof, said annular ratchet means being disposed normal to a longitudinal axis of said elongate latching pin; said elongate latching pin adapted to depend from a distal end of said prosthetic socket liner; a lock body adapted to abuttingly engage said thermoforming plate; said lock body including a pyramid formed integrally therewith, said pyramid adapted to engage a pylon of said prosthesis; fastener means for releasably interconnecting said thermoforming plate and said lock body; latching means formed in said lock body for releasably engaging said elongate latching pin; an opening formed in said lock body; a centrally apertured latching block disposed within said opening; said latching block adapted to engage said elongate latching pin between contiguous ratchets of said annular ratchet means and to hold said elongate latching pin against longitudinal movement when so engaged; said opening having an extent in a preselected dimension greater than an extent of said latching block in a corresponding dimension so that said latching block has a first position at a first end of said opening, a second position at a second end of said opening, and an infinite plurality of positions therebetween; a bias means positioned within said opening, said bias means urging said latching block into engaging relation to said elongate latching pin when said bias means is in repose; and release means for overcoming said bias means so that said elongate latching pin and hence said socket liner are removable from said lock body and hence from said laminating ring when said release means is activated; whereby said liner is connected to said prosthesis when said elongate latching pin is engaged by said latching means; and whereby loosening or removal of said fastener means enables separation of said laminating ring and said lock body so that jamming of said latching means by a sock may be overcome in the absence of a need to cut off said socket.