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:
Aug. 28, 2007
Filed:
Aug. 20, 2004
Werner Kleine, Achim, DE;
Werner Britten, Landsberg, DE;
Werner Kleine, Achim, DE;
Werner Britten, Landsberg, DE;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
A shank for a working tool has at least three recesses () provided within the lockable region () and arranged in a cross-section (c-c) to the tool axis (A) at least at angles of 0°, 120°, and 240° within the radial reference dimension (R) of the shank, with at least one of the recesses () being axially closed toward a free end of the shank (), and at least one protrusion () arranged circumferentially between two adjacent recesses () outside of the radial reference dimension, with the sum of central recess angles (α) of the recesses amounting to at least 150°, and a central protrusion angle (β) of the at least one protrusion () being smaller than a central recess angle (α).