Orthopedic device
First Claim
1. An implant device for fixating bone portions in a living body comprising an elongate, vertical shaft defining the central axis of the device, said shaft has an upper deployment end portion and a lower securement end portion, said shaft has a plurality of circumferentially spaced elongate longitudinally extending radially outwardly opening strut accommodating recesses with upper and lower ends in its deployment end portion;
- first cam means parts on said shaft related to each recess;
an elongate vertical sleeve with an upper deployment end portion and a lower securement end portion is engaged about and is shiftable axially relative to said shaft, said sleeve has circumferentially spaced longitudinally extending and radially opening strut accommodating slots, each registering with a related recess;
first pivot means parts related to each slot at the upper end portion of said sleeve on a turning axis normal to and extending transverse the radial plane of the recess;
a plurality of elongate flat blade-like struts with inner pivot ends and outer free ends, each strut is engaged in a related slot and recess with its flat plane parallel with said radial plane thereof;
a second pivot means part at the pivot end of each strut and engaged with said first pivot means parts related to the slot in which the strut is engaged, said struts are pivotally movable relative to said sleeve between unactuated positions where they extend longitudinally within their related slots and recesses to actuated positions where they extend radially and axially outward from said slots and recesses;
a lever arm projects from the pivot end of each strut and into its related recess;
each lever arm has second cam means parts engaged with the first cam means parts in its related recess to pivot said arm between its unactuated and actuated positiions upon axial movement of said shaft relative to said sleeve; and
manually accessible and operable drive means at and between said securement end portions of said shaft and sleeve to move said shaft axially relative to said sleeve.
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Accused Products
Abstract
An improved orthopedic implant device comprising an elongate shaft and an elongate sleeve engaged about and shiftable longitudinally of the shaft a plurality of elongate struts spaced circumferentially about the sleeve and shaft and shiftable between unactuated positions where they are parallel with the sleeve and actuated positions where they extend radially outward from the sleeve, pivot means connecting one end of the shafts with the sleeve, lever arms on the shafts projecting into the sleeve from the pivot means therefor and cam means between the lever arms and the shaft whereby the lever arms are pivoted between the unactuated and actuated positions upon axial shifting of the shaft relative to the sleeve.
610 Citations
18 Claims
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1. An implant device for fixating bone portions in a living body comprising an elongate, vertical shaft defining the central axis of the device, said shaft has an upper deployment end portion and a lower securement end portion, said shaft has a plurality of circumferentially spaced elongate longitudinally extending radially outwardly opening strut accommodating recesses with upper and lower ends in its deployment end portion;
- first cam means parts on said shaft related to each recess;
an elongate vertical sleeve with an upper deployment end portion and a lower securement end portion is engaged about and is shiftable axially relative to said shaft, said sleeve has circumferentially spaced longitudinally extending and radially opening strut accommodating slots, each registering with a related recess;
first pivot means parts related to each slot at the upper end portion of said sleeve on a turning axis normal to and extending transverse the radial plane of the recess;
a plurality of elongate flat blade-like struts with inner pivot ends and outer free ends, each strut is engaged in a related slot and recess with its flat plane parallel with said radial plane thereof;
a second pivot means part at the pivot end of each strut and engaged with said first pivot means parts related to the slot in which the strut is engaged, said struts are pivotally movable relative to said sleeve between unactuated positions where they extend longitudinally within their related slots and recesses to actuated positions where they extend radially and axially outward from said slots and recesses;
a lever arm projects from the pivot end of each strut and into its related recess;
each lever arm has second cam means parts engaged with the first cam means parts in its related recess to pivot said arm between its unactuated and actuated positiions upon axial movement of said shaft relative to said sleeve; and
manually accessible and operable drive means at and between said securement end portions of said shaft and sleeve to move said shaft axially relative to said sleeve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
- first cam means parts on said shaft related to each recess;
Specification