Expansion anchor assembly

US4482277A · kind A · utility

Assignee

• Hilti Aktiengesellschaft · LI

Inventor

• Erwin Schiefer · Munich, DE

Key dates

• Filing date: Feb 22, 1983
• Grant date: Nov 13, 1984
• Expiry date: Feb 22, 2003

Classification

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

Abstract

An expansion anchor assembly is made up of an anchor bolt and an expansion sleeve encircling and secured in an annular recess on the bolt. Adjacent the annular recess, the anchor bolt has a frusto-conical section. The expansion sleeve has diametrically opposite reduced thickness wall sections with a projection extending outwardly of the surface of the sleeve along each of the reduced thickness wall sections. When the expansion anchor assembly is inserted into a prepared borehole and the frusto-conical section is drawn into the sleeve, the sleeve breaks into axially extending sections along the reduced thickness wall sections and a uniform contact is provided between the sleeve section and the borehole surface.