Fastening element with a cavity containing an explosive charge

US4271747A · kind A · utility

Assignee

• Dynamit Nobel GmbH · DE

Inventors

• Hellmut Bendler · Birkenfeld, DE
• Axel Homburg · Bensberg, DE
• Horst Penner · Fürth, DE

Key dates

• Filing date: Jun 8, 1978
• Grant date: Jun 9, 1981
• Expiry date: Jun 8, 1998

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F42B3/006
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A fastening element having a cavity containing an explosive charge arranged so that, upon explosion of the explosive charge, anchoring of the fastening element in a bore of a workpiece takes place automatically. This fastening element functions both as a rivet and nail in combination and comprises sleeve means defining the cavity containing the explosive charge at one end and providing an aperture at the other end, and a nail disposed within the sleeve means, said nail comprising a head, shank and a tip and being arranged to be driven outside the aperture formed in the other end of the sleeve means. The head of the nail acts as a piston which can be driven by explosion of the explosive charge and as a stop which arrests the driving-out movement when the shank of the nail has passed through said aperture.