FASTENING DEVICE TO CONNECT RAIL TO SLEEPERS Russian patent published in 2006 - IPC E01B9/30 

FIELD: rail road building, particularly fastening on wooden or concrete sleepers or on masonry with by resilient steel clips.

SUBSTANCE: fastening device comprises resilient clip with working parts supported by rail base through insulating means, as well as anchoring unit secured in concrete sleeper and having head provided with slots for resilient clip ends fixation. The head has upper surface defined by two planes inclined one to another. Plane located closer to rail base is of descending type. Adjoining plane is of ascending type. Anchor head comprises grooves having end walls, which form single contact plane along with end anchor surface. Upper inner groove parts are defined by adjacent surfaces inclined to each other. Resilient clip ends bent upwards are located on surfaces arranged closer to rail base.

EFFECT: increased contact area between insulation means and end surface of anchoring unit head, increased efficiency of clip restriction against displacement during dynamic clip oscillations.

3 cl, 4 dwg