Drill for smooth- and hex-shank bits
First Claim
Patent Images
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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Abstract
A drill has 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 standard-size bit shank, a chuck body mounted on the spindle, rotatable about the axis at the front end, and having an axially forwardly open tool recess, and a plurality of jaws displaceable in the body to grip a bit in the recess.
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Citations
10 Claims
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1. A drill comprising:
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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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2. A drill comprising:
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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;
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 a bit in the recess;
a radially displaceable retaining element, the bit shank being formed with a radially outwardly open groove;
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;
an annular retainer engageable with the retaining element, centered on the axis, movable axially between the actuated and unactuated positions, and displaceable between an unactuated position pressing the retaining element into the groove and an actuated position allowing the retaining element to move out of the groove; and
spring means urging the retainer into the unactuated position.
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3. A drill comprising:
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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;
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 a bit in the recess, one of the jaws being formed with a transversely open recess;
an element radially movable in the chuck body and engageable in the recess; and
a spring urging the element toward the one jaw, the recess and jaw being so positioned that the element can only engage in the recess when the jaw is retracted enough to allow a bit shank to pass the jaws and engage in the socket.
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4. A drill comprising:
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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;
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 a bit in the recess;
a radially displaceable retaining ball, the bit shank being formed with a radially outwardly open groove; and
means for urging the retaining ball radially inward into the groove of the shank in the socket, whereby the retaining ball holds the shank in the socket. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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Specification