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Drill for smooth- and hex-shank bits

  • US 6,851,678 B2
  • Filed: 07/03/2002
  • Issued: 02/08/2005
  • Est. Priority Date: 02/20/2002
  • Status: Expired due to Fees
First Claim
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1. A drill comprising:

  • a drive unit having a spindle rotatable about an axis and having an axially forwardly directed front end formed centered on the axis with an axially forwardly open polygonal-section socket dimensioned to fit with a bit shank formed with a radially outwardly open groove;

    a chuck body mounted on the spindle, rotatable about the axis at the front end, and having an axially forwardly open tool recess;

    a plurality of jaws displaceable in the body to grip the bit shank in the recess;

    a retaining element radially displaceable in the spindle; and

    means for urging the retaining element radially inward into the groove of the shank in the socket, whereby the retaining element holds the shank in the socket.

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