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:
Jun. 13, 2000
Filed:
Dec. 09, 1998
Werner Kaibach, Buchloe, DE;
Stefan Raber, Kaufering, DE;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
An undercut self-cutting spreading anchor with an anchor rod (5) provided, at one of its ends with a load application element and at another, opposite of its ends, with a head portion (7) a diameter of which increases toward a free end (6) of the anchor rod (5), with the head portion (7) having a substantially crowned shape, a largest diameter region (9), and at least two sections (11, 13) which adjoin the largest diameter region (9) and diameters of which diminish toward the free end (6) of the anchor rod (5), the adjoining section (11, 13) having annular surfaces (12, 13) mean inclination angles of which toward an axis (A) of anchor rod (5) increases in a setting direction (S); and a sleeve (2) displaceable axially along the anchor rod (5) and having a plurality of expansion tabs (3) separated by longitudinal slots and which expand radially upon sliding over the head portion (7) of the anchor rod (5).