Screw extractor
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United States of America Patent
Stats
-
Jun 28, 1983
Grant Date -
N/A
app pub date -
Mar 3, 1981
filing date -
Mar 3, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A tool for use in removing broken or inoperative screw fasteners. The tool has a tubular-shaped extension at one end with cutting teeth projecting axially from the extension. The teeth can cut around a fastener when the tool is rotated in one direction to provide a stub end on the fastener over which the extension fits. The extension is then tightened on the stub end and teeth, extending radially inwardly from the extension, tightly grip the stub end so that the fastener can be unscrewed on reverse rotation of the tool.
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Cited Art Landscape
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