Keyless drill chuck

Details Keyless drill chuck Keyless drill chuck

1997-08-27

1999-07-06

Pitts, Andrea L.

Chucks or sockets

Socket type

Loose jaws

279 60, 279902, 408226, B23B 522

Patent

active

059188863

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.

REFERENCES:
patent: 4527809 (1985-07-01), Umbert
patent: 4695065 (1987-09-01), Komatsu et al.
patent: 4848779 (1989-07-01), Wheeler et al.
patent: 5685549 (1997-11-01), Yang

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