Screwdriver for an inner profile screw
AssigneeStryker Trauma GmbH
InventorPeter Witte
Life of this patent
Estimating the term…
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.
Claims20
A method of using a screwdriver with an inner profile screw having an inner profile recess, the method comprising steps of:
- providing an axially extending shaft including a distal tip having a profile corresponding with the inner profile recess of the inner profile screw, the distal tip having an outer profile formed in a split manner defining at least two sections, at least one of the at least two sections having an oblique contact member, and
- moving a bushing disposed about the shaft in an axial direction along the shaft toward the distal tip such that an inwardly extending contact ring disposed around a circumference of the bushing disengages from the oblique contact member, thereby allowing the at least two sections of the distal tip to deflect away from one another to clamp the inner profile recess with the distal tip.
A method of using a screwdriver with a screw having a drive socket, the method comprising steps of:
- providing an axially extending shaft with a bifurcated tip having two sections, the tip having a cross-sectional profile corresponding with a cross-sectional profile of the drive socket, the shaft having a tapered section adjacent the bifurcated tip;
- and
- moving a bushing disposed about the shaft in an axial direction along the shaft from the tapered section toward the bifurcated tip such that an inwardly extending protrusion disposed around a circumference of the bushing disengages from the tapered section on the shaft, thereby allowing the two sections of the tip to expand apart from one another.
A method of using a screwdriver with an inner profile screw having an inner profile recess, the method comprising steps of:
- engaging a distal tip of an axially extending shaft into the inner profile recess of the inner profile screw, the distal tip having a profile corresponding with the inner profile recess of the inner profile screw, the distal tip having an outer profile formed in a split manner defining at least two sections, at least one of the at least two sections having an oblique contact member,
- clamping the inner profile recess with the distal tip by moving a bushing disposed about the shaft in an axial direction along the shaft toward the distal tip such that an inwardly extending contact ring disposed around a circumference of the bushing disengages from the oblique contact member, thereby allowing the at least two sections of the distal tip to deflect away from one another to engage walls of the inner profile recess, and
- rotating the shaft about a central axis of the shaft to drive the engaged inner profile screw.
Dependencies are inferred from the claim text.