Undercut self-cutting anchor

US6012887A · kind A · utility

Assignee

• Hilti Aktiengesellschaft · LI

Inventors

• Werner Kaibach · Buchloe, DE
• Stefan Raber · Kaufering, DE

Key dates

• Filing date: Dec 15, 1998
• Grant date: Jan 11, 2000
• Expiry date: Dec 15, 2018

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16B2013/007
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An undercut self-cutting anchor including an anchor rod (2) having a stem(3) provided with a load application element (4) at its rear end and with a head portion (5) at its opposite end, with the head portion (5) widening toward a front end (6) of the anchor rod (2), and an expansion sleeve (8) longitudinally displaceable over the head portion (5) and having, at its end adjacent to the head portion (5), a plurality of expansion tabs (11), which are separated from each other by longitudinal slots (10) and extending in a direction toward the head portion (5), and a plastic hinge-forming transition region (13) extending toward the expansion tabs (11), with a wall thickness (t) of the expansion sleeve (8) in the transition region (13) decreasing in a direction toward a front end (9) of the expansion sleeve.