Interference fit screw driver
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United States of America Patent
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N/A
Issued Date -
N/A
app pub date -
Nov 18, 2002
filing date -
Jun 28, 2001
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
An interference fit screw driver has a polygonal driving surface to impart torque to a corresponding surface in a screw. The end of the polygonal driving surface has a frusto-conical shaped gripping member which fits into an aperture in the screw to create a friction fit between the screw and screw driver. This allows the screw to be attached to the screw driver to facilitate installation of the screw. The friction fit is tight enough to hold the screw to the driver, yet allows the driver to be easily disengaged from the screw by pulling the driver away from the screw once the screw is lodged in place. The interference fit screw driver is particularly useful in turning bone screws into the spine of a patient during orthopedic surgery.
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