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:
Sep. 07, 1999
Filed:
Apr. 14, 1998
Thomas O Blankenship, O'Fallon, MO (US);
James L Morrison, O'Fallon, MO (US);
Brian J Martinek, Moscow Mills, MO (US);
Dan B Hoelter, Dittmer, MO (US);
Abstract
The drill/countersink nosepiece assembly of the present invention permits the fabrication of a precise hole and countersink in a structural assembly workpiece in a single operation with the aid of a drill plate or other hole template. The small size of the nosepiece tip enables multiple holes to be closely spaced without interference between drill plate engagement slots. A close fit between the shaft of the rotating drill/countersink bit and the inner surface of the sleeve prevents the bit from wandering upon repeated or heavy use. The drill/countersink nosepiece comprises a combination drill/countersink bit to be received by a drill motor chuck, a bushing to be received by a fixed housing portion of the drill motor, a sleeve telescopically mounted within the bushing, a spring within the bushing to bias the sleeve forward, and fingers or other features at the end of the sleeve for engaging an alignment slot in a drill plate. In operation, the nosepiece is attached to a power feed or hand-held drill motor and tooling slots or other features about the hole template in the drill plate are engaged by the sleeve fingers, which extend longitudinally from the retractable sleeve and lie within the infinite cylinder defined by the outer diameter of the sleeve. The drill/countersink nosepiece is adapted to be mated interchangeably with power feed and hand-held drill motor units.