Countersink drill system

Details Countersink drill system Countersink drill system

2006-03-28

2009-11-10

Howell, Daniel W (Department: 3726)

Cutting by use of rotating axially moving tool

With control means energized in response to activator...

To control infeed

C408S015000, C408S130000

Reexamination Certificate

active

07614832

ABSTRACT:
A portable, air powered drill has an automated feed system and an adjustable dwell for producing countersunk holes in a workpiece. The feed system uses hydraulic cylinders and pneumatic control logic to control the feed rate, and the dwell time of a countersink drill bit at the end of the drill stroke. A movable mechanical stop permits an operator user to adjust countersink depth. The control logic provides fully automatic feed of the drill bit, and adjustment of the dwell time to consistently produce identical countersunk holes in a variety of workpiece materials.

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patent: 4867617 (1989-09-01), Maass et al.
patent: 5222844 (1993-06-01), Maass et al.

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