Drilling tool assembly and its center drill and cup shape drill

Details Drilling tool assembly and its center drill and cup shape drill Drilling tool assembly and its center drill and cup shape drill

1996-11-27

1998-09-29

Howell, Daniel W.

Cutting by use of rotating axially moving tool

With product handling or receiving means

Ejector

408204, 408207, 408224, 175403, B23B 4700

Patent

active

058138021

ABSTRACT:
A center drill used for machining a hole in a work piece which is adapted to be partially enclosed in a cup shape drill member in a side view thereof, includes a drill portion provided on a leading end of the center drill, and a dust extractor radially outwardly extending from a portion of the center drill which is enclosed in the cup shape drill member.

REFERENCES:
patent: 3390596 (1968-07-01), Trevathan
patent: 4322187 (1982-03-01), Hougen
patent: 4500234 (1985-02-01), Orth et al.
patent: 4693644 (1987-09-01), Takahashi
patent: 4966502 (1990-10-01), Magyari
patent: 4968192 (1990-11-01), Hamilton
patent: 5035548 (1991-07-01), Pidgeon
patent: 5096341 (1992-03-01), Despres
patent: 5171111 (1992-12-01), Kishimoto
patent: 5417526 (1995-05-01), Stock et al.
patent: 5435672 (1995-07-01), Hall et al.

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