Chuck for miniature rotary tool

Details Chuck for miniature rotary tool Chuck for miniature rotary tool

1979-01-29

1980-11-18

Briggs, William R.

Chucks or sockets

Socket type

Side detent

279 1B, 279 1C, 279 79, B23B 3108

Patent

active

042342015

ABSTRACT:
The present invention is directed to a chuck for use in a motor driven tool. The chuck is internally mounted within a transverse opening which intersects a longitudinal opening in the output shaft of the motor driven tool and includes an internal, transversely mounted hardened roller which locks a tool bit in the motor output shaft only when a torque or resistance is applied to the tool bit. The torque or resistance creates a twisting moment applied about the axis of the tool bit to lift the roller into engagement with an interior portion of the transverse opening to thereby lock the bit relative to the motor driven tool. In the quiescent state the tool bit is unlocked and may be readily removed from the motor driven tool or inserted at almost any given angle. The motor output shaft and associated bearings provide essentially the entire structural support for the tool housing. One of these bearings is disposed on the opposite side of the chuck from the motor thus providing balanced support for the long motor output shaft, which precludes wobble and malalignment of the chuck.

REFERENCES:
patent: 799787 (1905-09-01), Gessert
patent: 1071433 (1913-08-01), Kenerson
patent: 1753441 (1930-03-01), Morehouse
patent: 2259797 (1941-10-01), Cohen
patent: 2356245 (1944-08-01), Johnston
patent: 3132426 (1964-05-01), White
patent: 3495844 (1970-02-01), Dee
patent: 3709508 (1973-01-01), Dudley
patent: 3795455 (1974-03-01), Kosmowski

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