Expansion anchor assembly including an interconnecting device

US4122753A · kind A · utility

Assignee

• Hilti Aktiengesellschaft · LI

Inventors

• Wolf Kuhlmann · Nürnberg, DE
• Gerhard Rumpp · Herrsching am Ammersee, DE
• Albert Busler

Key dates

• Filing date: Aug 13, 1976
• Grant date: Oct 31, 1978
• Expiry date: Aug 13, 1996

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16B13/045
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In a straddling dowel or expansion anchor assembly, a threaded bolt or stud has a head or nut adjacent one end for securing a member onto a support structure. The bolt is threaded into one end of a sleeve-like member and a threaded projection extends axially from the other end of the member with the projection extending axially through an expansion sleeve. A spreader is threaded onto the outer end of the projection for use in expanding the expansion sleeve. A device interconnects the bolt or stud and the sleeve-like member so that rotation of the bolt is transmitted to the sleeve-like member for pulling the spreader into and expanding the expansion sleeve. When a minimum anchoring value of the anchor within a borehole is achieved, the interconnection is disengaged. By continued rotation of the bolt or stud the member can be secured to the support structure with the interconnecting device being completely enclosed within the anchor structure.