Expanding masonry attachment plug

US3937122A · kind A · utility

Assignee

• Tox-Dubel-Werk Richard W. Heckhausen KG

Inventor

• Josef Riedel · Altötting, DE

Key dates

• Filing date: Jan 7, 1974
• Grant date: Feb 10, 1976
• Expiry date: Jan 7, 1994

Classification

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

Abstract

The specification describes an expanding masonry attachment plug, whose plug head has a wide insertion hole and whose shank, provided with a through hole, is divided by longitudinal slits into expanding segments. The latter join at the far end to form a plug foot. To enable use of the plug both in dense masonry material and also in light weight building materials the plug has the following features. Internally the expanding segments delimit a guide hole adapted to bring about expansion, with a diameter which is less than the diameter of the appropriate screw. The plug foot consists of a closed sleeve adapted to bring about a bending outwards of the expanding segments by axial compression or clamping of the shank, with a through hole for the cutting of a tension thread on complete driving of the screw into position.