Ball draw-off apparatus for shaft prostheses
The invention relates to a ball draw-off apparatus for shaft prostheses with balls ( 3 ) which can be placed onto the prosthesis neck ( 2 ). The apparatus has two rotary bodies ( 5 a , 5 b ) which are rotatably supported in a housing ( 4 ), which can in each case be rotated with a lever arm ( 6 a ,...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The invention relates to a ball draw-off apparatus for shaft prostheses with balls (
3
) which can be placed onto the prosthesis neck (
2
). The apparatus has two rotary bodies (
5
a
, 5
b
) which are rotatably supported in a housing (
4
), which can in each case be rotated with a lever arm (
6
a
, 6
b
) and which with their axes of rotation (
7
a
, 7
b
) lie in a common plane and form an open gap S in the projection onto the plane F for the introduction of the prosthesis neck (
2
). The rotary bodies have a profile which with increasing rotation decreases the gap S for clamping the prosthesis neck (
2
) and causes an increase of the distance of its upper edge (
9
a
, 9
b
) from the plane F in order to produce a draw-off force P at the placed on ball directly or indirectly via an intermediate body. |
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