Core cutter

Details Core cutter Core cutter

2004-05-28

2009-11-03

Howell, Daniel W (Department: 3726)

Cutting by use of rotating axially moving tool

Tool or tool with support

Having axial, core-receiving central portion

C408S206000

Reexamination Certificate

active

07611312

ABSTRACT:
A core cutter comprises a cylindrical base, a plurality of cutting portions provided at a tip end of the base, discharge grooves configured to discharge chips cut by the cutting portions, and an attaching portion. Each of the cutting portions2includes a block and at least three cutting blades. A first cutting blade2amay be located radially inward relative to the second and third cutting blades2band2cand the second cutting blade2cis located between the first and third cutting blades in a radial direction, and the cutting blades deviate rearward in a rotational direction. A wall3bof the discharge groove3corresponds to a cutting surface2kof the third cutting blade, and a gallet4is provided adjacent each cutting portion, the gallet formed by cutting an outer peripheral surface of a tip end portion.

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International Search Report for International Patent Application No. PCT/JP2004/007740 by the Japanese Patent Office dated Jul. 1, 2004 (2 pages).

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