Multi-zone drilling system with spiral drills and quick adjustme

Details Multi-zone drilling system with spiral drills and quick adjustme Multi-zone drilling system with spiral drills and quick adjustme

1977-03-29

1978-09-05

McGehee, Travis S.

Cutting by use of rotating axially moving tool

Tool-support with means to permit positioning of the tool...

Including tool-holding clamp and clamp actuator

279 22, 279 75, 408226, 408240, B23B 3144, B23B 522

Patent

active

041115929

ABSTRACT:
The multi-zone drilling system consists of a spiral drill provided, over its whole length, with continuous spiral slots and a uniform core diameter, which drill is driven by steel clamps mounted in the bottom portion of the drill chuck and engaging the spiral slot surfaces. The spiral drill is furthermore provided, at its upper end, with an annular slot pin, extractably fixed in an annular slot-locking sleeve; this annular slot-locking sleeve is in turn mounted in a pressure element which is vertically adjustable in a delicately stepped way via a connecting bush, for the purpose of altering the jutting-out length of the drill attachment in the drill chuck.

REFERENCES:
patent: 2751229 (1956-06-01), Schultz
patent: 3816015 (1974-06-01), Bliz et al.

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