Rotationally and axially restrained drill bit and chuck assembly

Details Rotationally and axially restrained drill bit and chuck assembly Rotationally and axially restrained drill bit and chuck assembly

1990-01-29

1991-02-05

Howell, Daniel W.

Cutting by use of rotating axially moving tool

Means to drive tool

Universal or flexible drive connection to rotate tool

408226, 408240, B23B 4700

Patent

active

049900382

ABSTRACT:
A drill bit and chuck for interconnection with the end of a flexible drive shaft which axially and rotationally restrains the drill bit against becoming separated from the chuck during an operation requiring bone drilling, for example. The drill bit drive end has an eccentrically mounted boss with an enlarged head. A collet has an internal wall with an eccentric opening for receiving and locking with the drill bit boss head. The opposite end of the collet is staked onto the flexible shaft.

REFERENCES:
patent: 256050 (1882-04-01), Richmond
patent: 556182 (1896-03-01), Grady
patent: 2025779 (1935-12-01), Roelke
patent: 2188426 (1940-01-01), Blair
patent: 2773693 (1956-12-01), Chittenden

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