The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 2009
Filed:
Mar. 28, 2006
David N. Nappier, Caseyville, IL (US);
Dorothy A. Nappier, Legal Representative, Caseyville, IL (US);
James L. Morrison, O'Fallon, MO (US);
David L. Fritsche, Forristell, MO (US);
David N. Nappier, Caseyville, IL (US);
Dorothy A. Nappier, legal representative, Caseyville, IL (US);
James L. Morrison, O'Fallon, MO (US);
David L. Fritsche, Forristell, MO (US);
The Boeing Company, Chicago, IL (US);
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.