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. 15, 1998
Filed:
Feb. 13, 1997
Applicant:
Inventors:
Gerald D Booher, Greenville, NC (US);
Juergen Wiker, Louisville, KY (US);
Philip O McKinney, LaGrange, KY (US);
Assignee:
Credo Tool Company, Woodburn, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
408224 ; 408226 ; 408230 ;
Abstract
A wood drill with a point, cutting lips at the point, a shank and a body. The body having lands defining between them flutes. The flutes have a high helix reach extending from a distance from the cutting lips toward the shank, an intermediate helix reach extending from the high helix reach toward the shank and a low helix reach extending between the intermediate reach and the shank. The drill has screw threads in a peripheral surface of the lands from a point adjacent the cutting lips a distance toward the shank less than the length of the high helix reach of the flutes.