Chucks or sockets – Socket type – Obliquely guided reciprocating jaws
Patent
1982-06-21
1984-01-03
Briggs, William R.
Chucks or sockets
Socket type
Obliquely guided reciprocating jaws
279 60, B23B 3112
Patent
active
044238819
ABSTRACT:
The chuck comprises a cylindrical body portion attached to the drill motor shaft and formed with inwardly and downwardly inclined slots which holds its jaws. Those jaws carry circumferential threads on their outer surfaces. An internally threaded ring rotatable about the chuck body meshes with the teeth on the jaws and causes them to move downwardly or upwardly as the ring is rotated. The ring is provided with an external groove which is not quite fully circumferential. The chuck body and ring are enclosed by a rotatable sleeve having an internal recess in the plane of the groove only large enough to hold a ball bearing between it and the groove on the ring. The chuck body and sleeve are provided with interlocking means which prevent longitudinal displacement but permit rotational movement therebetween. The chuck is caused to grasp the drill stem by holding the sleeve in hand and starting the drill motor. Rotation of the body portion carries the ring with it until an end of the groove makes contact with the ball bearing. Further rotation of the body portion causes the jaws to move downwardly against the drill stem. The drill is released in the same way by reversing the drill motor.
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patent: 3929343 (1975-12-01), Wanner et al.
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Briggs William R.
Webb Glenn L.
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