Undercut self-cutting spreading anchor

US6074145A · kind A · utility

Assignee

• Hilti Aktiengesellschaft · LI

Inventors

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

Key dates

• Filing date: Dec 9, 1998
• Grant date: Jun 13, 2000
• Expiry date: Dec 9, 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 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).