Keyless drill chuck
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United States of America Patent
Stats
-
Jul 6, 1999
Grant Date -
N/A
app pub date -
Aug 27, 1997
filing date -
Aug 27, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A keyless drill chuck includes a raising-and-lowering member which moves back and forth with reference to a shaft in order to secure a rear portion of the cutting tool, and jaws which grip the cutting tool in association with the movement of the raising-and-lowering member toward the jaws while the internal diameter of a circle defined by the jaws. The rear portion of the cutting tool is automatically gripped without the use of a chuck handle by means of a machining resistance transmitted to the jaws from the cutting tool and of the movement of the raising-and-lowering member caused by torsional torque transmitted to a shaft. A V-shaped recess is formed in the end of the raising-and-lowering member facing the jaws, so that the rear portion of the cutting tool can be removable, yet attached to the V-shaped recess.
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Cited Art Landscape
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