Gundrill

Details Gundrill Gundrill

2006-12-12

2006-12-12

Carter, Monica (Department: 3722)

Cutting by use of rotating axially moving tool

With means to apply transient, fluent medium to work or product

Including tool with duct

C408S199000, C408S705000

Reexamination Certificate

active

07147411

ABSTRACT:
A method of forming deep holes and a gundrill therefore is disclosed. The gundrill has an elongate tubular shank and a cutting tip, each provided with a tubular central region supplying pressurized drilling fluid and a non-circular fluid cross-section defining a drilling fluid return path in conjunction with the hole being formed. The cutting tip flute defines a primary rake surface terminating in an offset point, and a secondary flank surface for forming an outlet with the hole being drilled, sized to maintain fluid pressure in the bottom end space to cool the cutting surfaces and to effectively remove chips as they are formed. The drilling fluid exiting an orifice of the cutting tip, forms a maximum angle β relative to the hole axis when viewed radially, which is greater than sixty-six degrees in order to minimize drilling fluid stagnation in an elongate fluid return path.

REFERENCES:
patent: 1513350 (1924-10-01), Stolle
patent: 2325535 (1943-07-01), Nordberg
patent: 3054308 (1962-09-01), Larry
patent: 3260139 (1966-07-01), Sanborn
patent: 4092083 (1978-05-01), Larry
patent: 4137002 (1979-01-01), Barker et al.
patent: 4395169 (1983-07-01), Kashiwagi et al.
patent: 5443585 (1995-08-01), Kawase et al.
patent: 5486075 (1996-01-01), Nakamura et al.
patent: 5947660 (1999-09-01), Karlsson et al.
patent: 6481938 (2002-11-01), Widin
patent: 6626614 (2003-09-01), Nakamura
patent: 6676342 (2004-01-01), Mast et al.
patent: 6698981 (2004-03-01), Beno et al.
patent: 2003/0175085 (2003-09-01), Prokop
patent: 2004/0091328 (2004-05-01), Astakhov et al.
patent: 1 552 463 (1970-07-01), None
patent: 984664 (1965-03-01), None
patent: 52136488 (1977-11-01), None
patent: 01140909 (1989-06-01), None
patent: 2001009613 (2001-01-01), None
patent: 732087 (1980-05-01), None
patent: 975240 (1982-11-01), None
patent: 1199480 (1985-12-01), None
European Search Report—mailed Apr. 29, 2004 for EP 03 10 4139, foreign equivalent of co-pending U.S. Appl. No. 10/655,983.

Affiliated with

Also associated with

Rating

Gundrill does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3682438