Screwdriver for an Inner Profile Screw
AssigneeStryker Trauma GmbH
InventorPeter Witte
Life of this patent
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Abstract
A screw driver for a screw having a drive socket having an axially extending shaft with a bifurcated tip, the tip having a cross-sectional profile for insertion into a cross-sectional profile of the screw socket. The shaft has a tapered section adjacent the bifurcated tip. A bushing is mounted on an outer surface of the shaft for axial movement therealong. The bushing has inwardly extending protrusions for engaging the tapered section on the shaft upon movement in the axial direction along the shaft in a direction. away from the tip. This allows the selective capture or release of the screw by the shaft tip by axial movement of the bushing away from and towards the shaft distal tip.
Claims11
A screwdriver for an inner profile screw comprising an axially extending shaft and a tip at a distal shaft region having a profile formed in a manner which corresponds to an inner profile recess of an inner profile screw, whereby the tip at the distal region of the shaft has an outer profile formed in a split manner to form at least two sections and the shafts is received within a moveable bushing, whereby at least the one of the sections of the shaft formed by the split is provided with an oblique contact member,
- whereby the bushing is provided with a contact ring which acts upon the oblique contact member(s), and
- whereby through a movement of the bushing relative to the shaft, the section of the shaft provided with the oblique contact member is deflected away from the other section, clamping the inner profile recess with the tip.
A screw driver for a screw having a drive socket comprising:
- an axially extending shaft with a bifurcated tip, the tip having a cross-sectional profile for insertion into the cross-sectional profile of the screw socket, the shaft having a tapered section adjacent the bifurcated tip;
- a bushing mounted on an outer surface of the shaft for axial movement therealong, the busing having an inwardly extending protrusion for engaging the tapered section on the shaft upon movement in the axial direction along the shaft in a direction away from the bifurcated tip to expand the tip.
Dependencies are inferred from the claim text.