Patent ID: 7159707

Claim:
A pusher for scraper chain conveyors of the kind used in underground mining, comprising an upper member and a connectable lower member, said two members being connectable by means of a bolted connection, each member of said pusher featuring one part of one or more chain beds through which a flat jointing plane runs, as well as one part of the recesses provided for the bolts of the bolted connection and located to the outside of the chain bed, the upper member and the lower member embracing each other at least partially, and the upper member being configured as a bow-like bridge element with a bar-like central part and with downwardly projecting cuneiform ends that wrap over both ends of the bar-like lower member by the cuneiform ends from above, the two cuneiform ends of the bridge-like upper member having upper and lower guide surfaces sloping towards each other in V-formation, and the upper member and the lower member engaging each other at each end by means of nose-like centering projections on the upper member or the lower member, said projections engaging complementary recesses in contact surfaces of the lower member or the upper member, wherein supporting surfaces are provided between the upper member and the lower member in the area between the cuneiform ends at at least one of the bar-like central part of the upper member and the bar-like lower member, said supporting surfaces effecting a gap between the upper member and the lower member, at least in a vicinity of the bolted connections.