Expansion dowel for a structural component having a hollow space

US4462729A · kind A · utility

Assignee

• Hilti Aktiengesellschaft · LI

Inventors

• Raimer Uhlig · Munich, DE
• Gusztav Lang · Munich, DE

Key dates

• Filing date: Dec 2, 1981
• Grant date: Jul 31, 1984
• Expiry date: Dec 2, 2001

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16B13/061
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Expansion dowels for use in slabs, masonry and similar structural components having a face surface and a hollow space inwardly of the face surface so that the dowel can be inserted through the face surface into the hollow space. The dowel has a shaft part which extends through the face surface into the hollow space. Expansion arms are flexibly articulated to the shaft part and are located in the hollow space when the dowel is inserted. Support levers are flexibly articulated to the expansion arms and are interconnected by a link. The support levers are also located within the hollow space when the dowel is fully inserted. The expansion arms and support levers can be angularly displaced between an insert position so that the dowel can be inserted into the hollow space and an expansion position for holding the dowel in the inserted position. Releasable stops are provided for securing the expansion arms and support levers in the insert position.