FIELD: mining; applicable in mine working bolting. SUBSTANCE: anchor tightening device includes three-stage nut: the first stage is cylindrical, the second stage-pressing one is conical in shape with angle of cone inclination less than friction angle between nut and washer; the third stage-tightening stage whose shape provides for its tightening by required tool. Washer is made with flat base on face and with two-stage holes, one stage is cylindrical and the second stage is conical congruent to conical surface of nut. EFFECT: higher strength of anchor tightening device. 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| FOUR-STAGE THREE-BLADED ROTARY BIT FOR ROTARY BLASTHOLE DRILLING | 2014 |
|
RU2558097C1 |
| TANGENTIAL TURNING CUTTING TOOL | 2001 |
|
RU2212535C2 |
| ANCHOR TIGHTENING DEVICE | 1999 |
|
RU2165023C1 |
| INTERMEDIATE RAIL FASTENER ON REINFORCED CONCRETE BASE | 2002 |
|
RU2205258C1 |
| KVZ SCREW ANCHOR CLAMP | 2021 |
|
RU2774264C1 |
| EDGELESS DRILL BIT | 2001 |
|
RU2212511C2 |
| BIT FOR BLASTHOLE DRILLING | 2001 |
|
RU2212510C2 |
| BUILDING STRUCTURE CONCRETE STRENGTH TEST METHOD, PROFILED GROOVE BORING DEVICE, ANCHORING MEANS FOR BUILDING STRUCTURE CONCRETE STRENGTH TEST AND FORCE-APPLYING DEVICE THEREFOR, AS WELL AS ORIFICE DRILLING JIG | 2004 |
|
RU2271528C1 |
| DRILL CUTTER, DRILL CUTTER BODY AND DRILL CUTTER CARBIDE PLATE | 2022 |
|
RU2809269C1 |
| PEDESTRIAN RAILING OF SCREEN TYPE | 2007 |
|
RU2364677C2 |
