Screwdriver attachment
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United States of America Patent
Stats
-
Sep 9, 1980
Grant Date -
N/A
app pub date -
Dec 28, 1978
filing date -
Dec 28, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An elongated sleeve or tubular member is provided concentrically fixed about the shank of a screwdriver with the sleeve having an axially flexible section between its opposed ends to facilitate axial shortening of the sleeve when the screwdriver is used to rotate a fastener the head of which is captured within the open end of the sleeve proximal to the blade of the screwdriver. Such axial shortening of the sleeve automatically seats the screwdriver blade within the slot in the head of the fastener when the frictional force between the screw's threads and those of the tapped hole into which it is being driven overcomes the interference fit between the free end of the sleeve and the screw head.
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