Spreading anchor

US5941668A · kind A · utility

Assignee

• Hilti Aktiengesellschaft · LI

Inventors

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

Key dates

• Filing date: Aug 10, 1998
• Grant date: Aug 24, 1999
• Expiry date: Aug 10, 2018

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16B13/065
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A spreading anchor including an anchor rod (2) having, at its one end, a cone-shaped head portion (3) widening in a setting direction and, at its opposite end, a load application element, the anchor further including a sleeve (5, 16) surrounding the anchor rod (2) and having at its end adjacent to the head portion (3), an expansion section (7, 17) formed of a plurality of expansion tabs (9, 18) separated from each other by axially extending slots (8), and extending form a plastic hinge (11) in a direction toward the head portion (3), the expansion tabs (9) expanding radially upon relative displacement of the sleeve (5, 16) and the head portion (3), and the expansion tabs (9) having convexly curved, in the direction toward the head portion (3) free front edges (10, 19), with convexly curved free front edges (10, 19) of the expansion tab (9) forming, in a completely expanded position of the expansion tabs (9, 18), substantially arc sections of a circle (R).