Connecting part between leg prosthesis components

a technology of connecting parts and components, applied in the direction of basic electric elements, couplings, medical science, etc., can solve the problem that the remaining adjustable area is no longer sufficient for adjustment according to biomechanical criteria

Inactive Publication Date: 2000-01-18
OTTO BOCK ORTHOPADISCHE IND BESITZ & VERW
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

By rotating the rectangular four-holed flange in 90.degree. segments around its central axis defined by the circular centering collar, it is now possible to make a center skew notch in the adjusting element in various directions for compensatory pre-positioning, without having to make use of the direction-specific adjusting field to any noticeable degree.

Problems solved by technology

In the case of poor stump positioning, for example in the flexing and / or splaying direction, which can be found in particular in the constantly growing group of geriatric patients with amputated legs, in some circumstances it may be necessary in designing the prosthesis to use most of the adjustment area which is available in each direction but which is limited by its construction, so that the remaining adjustable area is no longer sufficient for adjustment according to bio-mechanical criteria.

Method used

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Examples

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Embodiment Construction

FIG. 5 shows an illustration from the previously published German Patent No. 19 22 619. Attached to a leg prosthesis component 1 is a flange (not illustrated in greater detail) on which an adjusting element is placed, composed of cup 2 and a four-sided pyramid 3 positioned centrally on the cup on its point. A bushing 5 is attached to the upper end of a second leg prosthesis component 4 in FIG. 5 and its upper free end is constructed as ball socket 6, which rests on cup 2 and has four boreholes in its surrounding shell, set at 90 degrees to each other and threaded on the inside, each with set screw 7 threaded into it, the inner end of which lies against the attached wall of the four-sided pyramid 3.

By loosening one set screw 7 and correspondingly tightening the opposing set screw, the adjustable ball joint can be swung in one defined plane and, upon corresponding adjustment of the two other set screws 7, in a second swinging plane perpendicular to the first plane. Adjustment of the t...

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Abstract

A connecting part of a ball joint between leg prosthesis components with a flange intended to fasten to the one component, the flange having an adjusting element position on it, consisting of a cup and a four-sided pyramid positioned centrally upon its point. To improve the adjustability of the connecting part, the flange is a rectangular flange with four holes, upon which the adjusting element is eccentrically positioned.

Description

BACKGROUND OF THE INVENTIONThe invention relates to the connecting part of a ball joint between leg prosthesis components with a flange, intended to attach to one of the components, on which there is an adjusting element, which consists of a cup and four-sided pyramid set on its point on the center of the cup.A corresponding embodiment can be derived from German Patent No. 19 22 619. In this case, the adjusting element composed of the cup and the pyramid is placed exactly in the middle of the attachment flange. By adjusting either of the two positional screws placed opposite each other, the ball joint can be adjusted in only two defined levels. This makes it possible, for example, to position a leg prosthesis advantageously on the load axis.This previously known adaptor is generally used to connect the prosthetic substitute system to the prosthetic shaft for lower leg stumps and short to medium-long upper leg stumps. In the case of poor stump positioning, for example in the flexing ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): A61F2/50A61F2/76A61F2/00A61F2/60A61F2/62
CPCA61F2/76A61F2002/30276A61F2002/30507Y10T403/32311A61F2002/5096A61F2220/0025A61F2230/0086A61F2002/5018
Inventor HIEMISCH, CHRISTIAN
Owner OTTO BOCK ORTHOPADISCHE IND BESITZ & VERW
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