Unit and device having a unit for positioning a prosthetic component
A prosthesis delivery handle with a bushing ( 66 ) with two adjacent internal threads ( 64, 74 ) with different diameters and pitch surrounding a tubular threaded first shaft member ( 36 ) cooperating with the first thread ( 64 ) and a second inner member with a protrusion ( 82 ) extending through an axial slot in the tubular first member such that the protrusion runs in the second thread ( 74 ). First and second members are connected to an external shaft ( 112 ) and an internal element ( 102 ) so that when the bushing is rotated first and second members travel axially with different speeds the internal shaft and an external shaft move accordingly.
1. A device ( 100 ) for placing a prosthetic component ( 120 ), the device ( 100 ) comprising a unit ( 10 ) operationally connected to an inner element ( 102 ) and an outer element ( 112 ), between which is configured for placement of a prosthetic component ( 120 ), wherein the unit ( 10 ) comprises a carrier part ( 30 ) comprising a threaded shaft ( 36 ) and a cooperating part ( 60 ) comprising two sets of internal threads ( 64 , 74 ) having a different diameter from one another and arranged in series along a longitudinal extent of the cooperating part ( 60 ),
wherein one set of the internal threads ( 64 ) is guided by the threaded shaft ( 36 ) to move the outer element ( 112 ) and another set of the internal threads ( 74 ) cooperates with a guidable member ( 82 ) that extends radially through the threaded shaft ( 36 ) to move the inner element ( 102 ) in a direction opposite to the movement of the outer element ( 112 ), thereby sheathing or unsheathing the prosthetic component.
2. The device according to claim 1 , wherein rotation of the cooperating part ( 60 ) moves the inner and outer elements ( 102 , 112 ) along different distances.
3. The device according to claim 1 , wherein one of the sets of internal threads ( 64 ) has a smaller pitch than the other set of the internal threads ( 74 ).
4. The device according to claim 1 , wherein the threaded shaft ( 36 ) cooperates with the set of internal threads ( 64 ) having the smaller diameter.
5. The device according to claim 1 , wherein the threaded shaft ( 36 ) has an opening ( 86 ) through which the guidable member ( 82 ) radially extends from the inner element ( 102 ).
6. The device according to claim 1 , wherein the unit ( 10 ) is configured as a twist-grip handle.
7. The device according to claim 1 , wherein the internal shaft ( 102 ) protrudes through the unit ( 10 ) at its proximal end ( 12 ).
8. The device according to claim 1 , wherein the internal shaft is connected to the guidable member ( 82 ).
9. A device ( 100 ) for placing a prosthetic component ( 120 ), the device ( 100 ) comprising a unit ( 10 ) operationally connected to an inner element ( 102 ) and an outer element ( 112 ), between which is configured for placement of a prosthetic component ( 120 ), wherein the unit ( 10 ) comprises a carrier part ( 30 ) comprising a threaded shaft ( 36 ) and a cooperating part ( 60 ) comprising two sets of internal threads ( 64 , 74 ) having a different diameter from one another and arranged in series along a longitudinal extent of the cooperating part ( 60 ),
wherein one set of the internal threads ( 64 ) is guided by the threaded shaft ( 36 ) to move the outer element ( 112 ) and another set of the internal threads ( 74 ) cooperates with a guidable member ( 82 ) that extends radially through the threaded shaft ( 36 ) to move the inner element ( 102 ) along a different distance and/or a different speed than the outer element ( 112 ), thereby sheathing or unsheathing the prosthetic component.