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:
Jul. 22, 2014
Filed:
Sep. 09, 2010
Javier Ibarra, Schaumburg, IL (US);
Hagen Dost, Chicago, IL (US);
Jonathan Markwald, Elmhurst, IL (US);
Michael Gong, Elk Groove, IL (US);
Javier Ibarra, Schaumburg, IL (US);
Hagen Dost, Chicago, IL (US);
Jonathan Markwald, Elmhurst, IL (US);
Michael Gong, Elk Groove, IL (US);
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A drill bit for a boring tool comprises a shank configured for engagement with the boring tool and a working tip having a first end attached to the shank and an opposite second end, and a conical helical thread extending substantially continuously from end to end. The thread root may include a rounded portion while the crest may be flat. The configuration of the helical thread, such as the crest width, thread depth, thread angle, cross sectional area and base width are adjusted as a function of the length of the threaded working tip to maximize bending strength and optimize thread wear and operability.