Sandvik Mining and Construction Tools Ab

Sandvik Mining and Construction Australia Pty Limited

Sandvik Mining and Construction Australia (production/supply) Pty Ltd

Sandvik Minina and Construction Tools Ab

Steven Weaver

Mieczyslaw Rataj

Bradley Darlington

Osvaldo Vallati

Mietek Rataj

Warren Roach

John Barry

Peter Young

A tension indication device for a rock bolt includes a support washer, a cover member having a central hole for receiving a trailing portion of the rock bolt, and an indicator substance provided in a first space in the cover member or in a recess in the support washer for facing the nut. Upon rotation of the nut, indicator substance is forced out of the first space such that the indicator substance is visible at inspection of the rock bolt, thereby indicating that the rock bolt has been tensioned.

Tension indicator for a rock bolt

A rotation indication device for a rock bolt including a central rod with a threaded trailing portion. The rotation indication device includes a blind nut having a threaded central recess for engaging the threaded trailing portion and a visual indication means provided at a bottom portion of the central recess and configured such that upon movement of the threaded trailing portion of the central rod into the bottom portion of the central recess, the central rod forces at least a portion of the visual indication means to move through a passage in the blind nut between the bottom portion of the central recess and the outside of the blind nut.

Visual indicator for correct torsion of a rock bolt

A rock bolt for installation within a bore formed in rock strata having an elongate shaft with the leading end for installation into the bore and a trailing end projecting from an open end of the bore. A locking nut is threadably attached to the trailing end and is arranged to display product information and the like at a display face. The display face is recessed axially into the nut to provide protection against damage to the display face that may otherwise render the information unreadable.

Rock bolt with information display region

A rock bolt arranged for installation within a bore formed in rock strata includes an elongate shaft with the leading end for installation into the bore and a trailing end projecting from an open end of the bore. A locking nut is threadably attached to the trailing end and is arranged to display product information and the like at a display face. The display face is recessed axially into the nut to provide protection against damage to the display face that may otherwise render the information unreadable.

Growing community of inventors

Heatherbrae, Australia

Steven Weaver