Drill chuck for smooth- and hex-shank bits
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United States of America Patent
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-
Apr 27, 2004
Grant Date -
Aug 21, 2003
app pub date -
Jul 3, 2002
filing date -
Feb 20, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A drill chuck has a chuck body centered on an axis and forming an axially forwardly open bit-receiving recess, an axially forwardly open polygonal-section seat at a base of the recess, and a plurality of jaws spaced angularly around the seat. The jaws can be displaced radially inward and outward to grip a bit in the recess. An element can move in the base of the recess between a blocking position in front of the polygonal-section seat and preventing entry of a bit thereinto and a freeing position clear of the seat and permitting entry of a bit thereinto. This element can be actuated for movement between the blocking and freeing positions either manually or automatically.
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