Drill with improved cutting insert formation

Details Drill with improved cutting insert formation Drill with improved cutting insert formation

2008-07-01

2008-07-01

Carter, Monica S. (Department: 3722)

Cutting by use of rotating axially moving tool

Tool or tool with support

Having peripherally spaced cutting edges

C408S144000, C408S227000, C408S713000

Reexamination Certificate

active

10257267

ABSTRACT:
A drill includes a tip-forming front end having at least two straight cutting edges and at least two chip flutes extending from the tip end towards a rear end. Each cutting edge includes an inner portion disposed near a center line of the drill, and an outer portion disposed farther from the center line. The peripheral end of each cutting edge is in the form of a smoothly curved nose portion protruding radially with respect to the center line. The nose portion is formed by several circular segments having mutually different radii (R1, R2, R3). Adjacent ones of the radii are of different size.

REFERENCES:
patent: 4210406 (1980-07-01), Berry, Jr.
patent: 4222690 (1980-09-01), Hosoi
patent: 4381162 (1983-04-01), Hosoi
patent: 4684298 (1987-08-01), Roos
patent: 4817742 (1989-04-01), Whysong
patent: 4950108 (1990-08-01), Roos
patent: 5049011 (1991-09-01), Bohnet et al.
patent: 5273380 (1993-12-01), Musacchia
patent: 5312209 (1994-05-01), Lindblom
patent: 5492187 (1996-02-01), Neukirchen et al.
patent: 5630681 (1997-05-01), Paya
patent: 5634745 (1997-06-01), Wiman et al.
patent: 5807041 (1998-09-01), Lindblom
patent: 5918105 (1999-06-01), Anjanappa et al.
patent: 5971673 (1999-10-01), Berglund et al.
patent: 5988953 (1999-11-01), Berglund et al.
patent: 6086980 (2000-07-01), Foster et al.
patent: 6183688 (2001-02-01), Karlsson et al.
patent: 6217263 (2001-04-01), Wiman et al.
patent: 6224302 (2001-05-01), Cole
patent: 6244791 (2001-06-01), Wiman et al.
patent: 6485235 (2002-11-01), Mast et al.
patent: 6527486 (2003-03-01), Wiman et al.
patent: 6551035 (2003-04-01), Bruhn et al.
patent: 2003/0202853 (2003-10-01), Ko et al.
patent: 2001341020 (2001-12-01), None
patent: 200236018 (2002-02-01), None
patent: 1782196 (1992-12-01), None
patent: WO 99/00207 (1999-07-01), None
patent: WO 00/21704 (2000-04-01), None

Affiliated with

Also associated with

Rating

Drill with improved cutting insert formation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Drill with improved cutting insert formation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drill with improved cutting insert formation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3918556