CONTACT SHOE OF TROLLEY-BUS TROLLEYS AND CURRENT-CONDUCTING COMPOSITE MATERIAL FOR MAKING THE SHOE Russian patent published in 1999 - IPC

FIELD: mechanical engineering; city transport. SUBSTANCE: contact shoe is made two-layer. Upper layer with working surface corresponding to contact wire profile is made of graphite-base composite material. Lower layer is made of graphite-base composite material with metal addition in form of powder, particle size not exceeding 150 150μm. Relation between components in material of lower layer is as follows, mas.%: electrode graphite, 4.5-29; phenol-formaldehyde resin, 5-16; urotropin, 0.5-1.6; metal powder, 60-90. EFFECT: increased wear resistance. 3 cl, 1 tbl, 1 dwg