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. 25, 2025
Filed:
May. 05, 2022
Guehring KG, Albstadt, DE;
Markus Kraus, Burladingen, DE;
Guehring KG, Albstadt, DE;
Abstract
Twist drill bit having a cutting tip () with a stepped structure, consisting of a shank (), a guide region () and the adjoining cutting tip () with a stepped structure, the stepped structure of which is interrupted by two flutes () winding about a drill bit axis (), wherein the cutting tip () with a stepped structure has a drill bit tip () with a radius (r), at which a pair of first main lips () are formed, and a multiplicity of coaxially arranged cutting steps (), which each have a conical step portion (), in which in each case a pair of further main lips (-) are formed, and a cylindrical step portion (), wherein the cylindrical step portions () have, towards the shank (), an increasingly large radius (r-r), wherein the difference between in each case one of the radii and the next one of the radii (Δr) is chosen such that, upon rotation about the drill bit axis (), the pair of further main lips (-) arranged therebetween sweep in each case over an annular face (A-A), coaxial with the drill bit axis (), on an imaginary plane (E) arranged perpendicularly to the drill bit axis (), and the annular faces (A-A) have an identical surface area, such that, during drilling, an identical chip volume is carried away with each pair of the further main lips (-).