Height-Adjustable Spinal Implant
First Claim
1. A height-adjustable spinal implant, comprising:
- a) first and second components rotatably fixed relative to one another and axially movable along a central longitudinal axis of the spinal implant;
each of said first and second components having at least two wall segments fixed on a base and extending in a direction of said central longitudinal axis at a radial spacing distance therefrom and forming an interior of the implant;
with two circumferentially adjacent wall segments each flanking a space in which a wall segment of the respectively other component extends and is axially guided;
b) a drive element;
disposed in said interior of the implant enclosed by said wall segments;
engaging said second component in a screw mechanism relationship;
having a toothed ring arranged coaxially with respect to said central longitudinal axis and used for rotary actuation thereof; and
bearing on said first component in a load direction;
c) a wall segment of said first component and said toothed ring being formed with an access opening extending therethrough for rotary actuation of said drive element by way of a maneuvering tool; and
d) a holding element in said interior connecting free ends of said wall segments of said first component to one another.
1 Assignment
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Accused Products
Abstract
A height-adjustable spinal implant has first and second components that are rotationally fixed relative to one another and axially movable along a central longitudinal axis of the implant. Each of the components have at least two wall segments that are fixed on a base and that extend in the direction of the central longitudinal axis and are at a radial distance from the latter. Circumferentially adjacent wall segments each flank a space in which a wall segment of the respective other component extends and is axially guided. A drive element is disposed in the interior of the implant that engages with the second component in a meshing relationship. The drive element bears, in the load direction, on the first component and has a toothed ring that is used for its rotary actuation. For the rotary actuation of the drive element, an access opening is present in a wall segment of the first component. The free ends of the wall segments of the first component are connected to each other by a holding element.
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Citations
19 Claims
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1. A height-adjustable spinal implant, comprising:
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a) first and second components rotatably fixed relative to one another and axially movable along a central longitudinal axis of the spinal implant; each of said first and second components having at least two wall segments fixed on a base and extending in a direction of said central longitudinal axis at a radial spacing distance therefrom and forming an interior of the implant; with two circumferentially adjacent wall segments each flanking a space in which a wall segment of the respectively other component extends and is axially guided; b) a drive element; disposed in said interior of the implant enclosed by said wall segments; engaging said second component in a screw mechanism relationship; having a toothed ring arranged coaxially with respect to said central longitudinal axis and used for rotary actuation thereof; and bearing on said first component in a load direction; c) a wall segment of said first component and said toothed ring being formed with an access opening extending therethrough for rotary actuation of said drive element by way of a maneuvering tool; and d) a holding element in said interior connecting free ends of said wall segments of said first component to one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification