Coring bit

Details Coring bit Coring bit

2007-03-13

2007-03-13

Howell, Daniel W. (Department: 3722)

Cutting by use of rotating axially moving tool

Tool or tool with support

Having axial, core-receiving central portion

C408S206000

Reexamination Certificate

active

11118003

ABSTRACT:
A coring bit provides easy core removal by utilizing a series of lateral blades which extend from the top cutting surface to the base of the bit. The lateral blades and inner faces of the coring bit are biased to provide a conical shape to the core thus permitting the core to be easily extracted. Vents positioned approximate the lateral blades allow chips, debris and waste to be quickly dispelled. Various types of small center drill bits aid in the initial coring stages.

REFERENCES:
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patent: 5934845 (1999-08-01), Frey
patent: 6007279 (1999-12-01), Malone, Jr.
patent: 6599063 (2003-07-01), Capstran
patent: 6786684 (2004-09-01), Ecker
patent: 2635635 (1990-03-01), None
patent: 04105811 (1992-04-01), None
patent: 04141309 (1992-05-01), None

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