Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Atlas Copco AB
Original Assignee
Atlas Copco AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from NO812997Aexternal-prioritypatent/NO159201C/en
Application filed by Atlas Copco ABfiledCriticalAtlas Copco AB
Publication of ES273697UpublicationCriticalpatent/ES273697U/en
Expansion bolt for the stabilization of rocks, comprising a closed tube at its ends, with an inlet for a fluid at one of its ends, by means of which it is subjected to pressure to achieve its expansion within a borehole, characterized in that the tube has along the part to be inserted in the hole or hole a deep longitudinal depression, of sufficient width and depth to allow an increase in the section of the tube of at least 40%, before said depression tends to disappear by the expansion of said tube. (Machine-translation by Google Translate, not legally binding)
ES1982273697U1981-09-031982-09-02Expansion bulk for the stabilization of rocks (Machine-translation by Google Translate, not legally binding)
PendingES273697U
(en)