Expansion dowel

US4156381A · kind A · utility

Assignee

• Hilti Aktiengesellschaft · LI

Inventor

• Erwin Schiefer · Munich, DE

Key dates

• Filing date: Aug 15, 1977
• Grant date: May 29, 1979
• Expiry date: Aug 15, 1997

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16B13/0891
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An expansion dowel of the type anchored within a prepared borehole, consists of a dowel body, an expansion element and a separating member. The expansion element is defined by a pair of slots cut in the dowel body. The slots do not intersect leaving a web connecting the expansion element to the dowel body. When the dowel is inserted into the borehole, the separating member breaks the web freeing the expansion element. The expansion element is wedge-shaped as is the recess in the dowel body defined by the slots.