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:
Jan. 14, 2003
Filed:
Jul. 13, 2000
Werner Kaibach, Buchloe, DE;
Stefan Raber, Kaufering, DE;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
A drill for forming undercuts in cylindrical bores formed in stone or concrete and including a drilling member ( ) having a stem ( ) provided, at its opposite longitudinal ends, respectively, with a shank ( ) receivable in a chuck of a hand-held drilling tool and a cutting head ( ) with abrasive cutting bodies, and a sleeve ( ) for receiving the drilling member ( ) and having, at its end adjacent to the shank ( ), a radial collar ( ), a drag bearing ( ) arranged in side the sleeve for supporting the drilling member ( ), and at least one opening ( ) formed in a front, in a direction toward the cutting head ( ), section of the sleeve and spaced axially from the drag bearing ( ) by a distance (a) amounting to from about 0.05×D to about 0.6×D, where D is an outer diameter of the sleeve in the drag bearing region of the sleeve.