IMPROVED SLIDING ANCHOR Russian patent published in 2012 - IPC E21D21/00 

FIELD: mining.

SUBSTANCE: sliding anchor includes anchor bar and anchor plate. Sliding control element with through channel is located on anchor bar. Sliding control element includes cage for sliding bodies at least with one cavity for receiving sliding body being in contact with side surface of anchor bar. Anchor plate is intended to be superimposed on the area enveloping the well mouth when sliding anchor is introduced to the well. Anchor plate has force transmitting connection with the above cage. Each cavity for receiving the sliding body passes in the above cage tangentially to side surface of anchor bar. Side surface of each cavity projects to free cross section of through channel by the pre-determined value. Each sliding body fills in the cross section of the cavity intended for it.

EFFECT: improving structural conditions for installation of the device that points quickly and reliably at still available sliding stroke.

19 cl, 9 dwg