Welded hip prosthesis
AssigneeOrtho Innovations, LLC
InventorsRobert Doubler, John Hammill
Life of this patent
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Abstract
A hip prosthesis has a neck, a trochanter, a link, and an intramedullary rod. The intramedullary rod and the link are formed as a sub-assembly connected together endwise by a universal joint formed as a tubular extension. The link is telescoped into the trochanter and the neck, successively. A bolt is threaded into a threaded bore in one end of the link and draws the intramedullary rod and link into the trochanter resulting in an immovable press fit.
Claims9
In a modular prosthesis to be used in bone joint replacement having a weight bearing component with a proximal end, a distal end, and a through bore therebetween, an intramedullary rod having a distal end and a proximal end adapted to be connected to said weight bearing component, the improvement comprising a sub-assembly composed of an elongated link having a proximal end and a distal end, said distal end of said link connected with a tubular extension having a mouth, said connection permitting relative rotational and longitudinal movement between said tubular extension and said link, said tubular extension rigidly affixed to said proximal end of said intramedullary rod whereby said proximal end of said link is adapted for insertion in said through bore.
A modular joint prosthesis comprising a neck, a trochanter, a fastener and a sub-assembly including an intramedullary rod and a link, said neck having a through bore, said trochanter having a through bore, said link and said intramedullary rod of said sub-assembly relatively movable, said link adapted to be telescoped with said through bore of said trochanter and said through bore of said neck whereby said trochanter is between said intramedullary rod and said neck and said fastener is adapted to lock said neck, said trochanter and said sub-assembly together.
An artificial hip joint comprising a neck having a longitudinal axis with an arm for receiving a ball extending at an angle from said longitudinal axis, a through bore with an annular skirt along said longitudinal axis, said through bore being countersunk, a trochanter with a through bore, a portion of said trochanter through bore adapted to receive said annular skirt for rotational movement, an end portion of said trochanter through bore being tapered, and an integrally formed sub-assembly having a link and a intramedullary rod connected by a tubular extension with the link and the intramedullary rod being relatively movable, said link including a threaded bore, said link adapted for insertion in said countersunk through bore and said trochanter through bore, said tubular extension having a taper complementary with said taper of said tapered end portion of said trochanter through bore whereby
Dependencies are inferred from the claim text.