Hollow drilling tool

Details Hollow drilling tool Hollow drilling tool

1989-07-20

1990-10-30

Howell, Daniel W.

Cutting by use of rotating axially moving tool

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

Including tool with duct

408204, B23B 5104

Patent

active

049665022

ABSTRACT:
A hollow drilling tool includes a tubular support with cutting members inserted in axially extending recesses in its leading end. The cutting members alternately project radially outwardly from and radially inwardly from the outer and inner surfaces of the support. An effective removal of drilled materials is possible by partly annular gaps between the cutting members and the borehole surface and the surface of the drilled core.

REFERENCES:
patent: 53722 (1866-04-01), Wyckoff
patent: 2188631 (1940-01-01), Kraus
patent: 3244035 (1966-04-01), Jehle et al.
patent: 3817648 (1974-06-01), Miller
patent: 4274769 (1981-06-01), Multakh
patent: 4539750 (1985-09-01), Jarvi et al.

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