Spannungsanzeige für Felsanker

Details

Veröffentlichungs-Nr.

EP3910163

Aktenzeichen

EP20174642

Anmeldetag

14. Mai 2020

Veröffentlichung

11. Oktober 2023

Erteilung

11. Oktober 2023

Rechtsraum

EP

IPC

E21D21/02F16B31/02

Abstract

A tension indication device 1 for a rock bolt 2 wherein the tension indication device 1 comprises a support washer 5, a cover member 6 with a central hole for receiving a trailing portion of the rock bolt 2, and an indicator substance 7 provided in a first space 8. The first space 8 is provided in the cover member 6 or in a recess in the support washer 5 for facing the nut 4. Upon rotation of the nut 4, indicator substance 7 is forced out of the first space 8 such that the indicator substance 7 is visible at inspection of the rock bolt 3, thereby indicating the rock bolt 3 has been tensioned.

Anmelder

Firmen

Sandvik Mining and Construction Tools AB
Sandvik Mining and Construction Australia Pty Ltd

Land

🇸🇪 Schweden

Fachgebiete