Patent ID: 6460657
Filing Date: 2002-10-08
Classification: B66B

Abstract:
A conveyor apparatus for open-cut mining in a funnel-shaped excavation with removal of overburden and mined deposits, formation of stopes and increased width at an opening of the funnel-shaped excavation at grade level with increased excavation depth, said apparatus comprising:an inclined elevator extending from an edge of said opening at grade level to said floor level; a traveling platform riding on said inclined elevator and adapted to receive a truck to be filled with overburden or mined deposits; at least one cable passing over separate upper and lower cable pulleys and having an upper pass of the cable extending to said upper cable pulley from said traveling platform and a lower pass of the cable extending from said lower cable pulley along said elevator; a counterweight riding on said elevator and connected to said lower pass of said cable; and a conveyor mechanism operating at grade level at an upper end of said elevator and having a cable drum looped by a portion of said cable between said upper and lower cable pulleys, at least one of said platform and said counterweight having a traveling frame guided on said elevator and provided with a windlass drum around which said cable is windable in a plurality of turns, a plurality of said cables being provided, said traveling frame being provided with a support frame carrying a common shaft on which a plurality of said windlass drums are mounted, each of said windlass drums receiving a respective one of said cables.