Rotary drilling instrument

Details Rotary drilling instrument Rotary drilling instrument

1996-01-31

1998-10-06

Lucchesi, Nicholas D.

Dentistry

Apparatus

Tool bit

A61C 302

Patent

active

058168079

ABSTRACT:
There is provided a rotary drilling instrument having uniform hardness, free from rust, and made of austenitic stainless steel possessing a hardness substantially the same as quenched steel or quenched martensitic stainless steel. The rotary drilling instrument is formed with a cutting section formed at one end of a body, a shank formed at the other end of the body, and a neck portion formed between the cutting section and the shank. The rotary drilling instrument is made of austenitic stainless steel having a fibriform organization elongated in a longitudinal direction and has a surface having a predetermined hardness.

REFERENCES:
patent: 4315742 (1982-02-01), Nash et al.
patent: 5259398 (1993-11-01), Vrespa
patent: 5297909 (1994-03-01), Tsay et al.

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