Stepped drill bit having split tip

Details Stepped drill bit having split tip Stepped drill bit having split tip

2005-05-10

2005-05-10

Howell, Daniel W. (Department: 3722)

Cutting by use of rotating axially moving tool

Tool or tool with support

Having stepped cutting edges

C408S224000

Reexamination Certificate

active

06890133

ABSTRACT:
A drill bit is disclosed having a cutting portion having a plurality of axially aligned, graduated cutting members. Each of the members has cutting edges defined by a single slot extending therethrough. A tip portion at one end of the cutting portion defines at least a pair of cutouts therein, wherein one of the cutouts is aligned with the slot.

REFERENCES:
patent: 469057 (1892-02-01), Chesnut
patent: 550190 (1895-11-01), Myers
patent: 2276532 (1942-03-01), Welty
patent: 2786373 (1957-03-01), Patton
patent: 2984130 (1961-05-01), Lentz
patent: 3076356 (1963-02-01), Simich
patent: 3758222 (1973-09-01), Oakes
patent: 4127355 (1978-11-01), Oakes
patent: 4582458 (1986-04-01), Korb et al.
patent: 5466100 (1995-11-01), Ahluwalia
patent: 5816812 (1998-10-01), Kownacki et al.
patent: 5934845 (1999-08-01), Frey
patent: 19526686 (1996-03-01), None
patent: 29703475 (1997-07-01), None
patent: 20015550 (2000-11-01), None
patent: 995 043 (1965-06-01), None
patent: 11-239907 (1999-09-01), None

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