METHOD FOR CONCRETION PRODUCTION FROM SEA BED Russian patent published in 2007 - IPC E21C50/00 

FIELD: obtaining minerals from underwater, particularly to produce ferromanganesian concretions from Baltic sea shelf in the case of low concretion depth.

SUBSTANCE: concretion production device comprises main watercraft, receiving means and winch mounted on the watercraft, as well as angle pulleys, head and rear haulage ropes, perforated vessel having rectangular cross-section and provided with cutting edges and locking means. Device also has movable means for rear haulage rope angle pulley fixation in space. The movable means is made as supplementary watercraft fastened to main one by means of two steel wire rope branches. The steel rope passes over additional angle pulley arranged on supplementary watercraft. Free steel rope ends are fastened to drum of additional winch installed on main watercraft. Running wheels are arranged in upper vessel part by means of holders so that they may cooperate with both steel wire rope branches in top and bottom parts thereof and displace above branches in longitudinal direction. Vessel locking means is made as rotary sector connected with crank installed on vessel side wall through connecting-rod. Crank may cooperate with curvilinear strap supported by main watercraft. Rear haulage rope is fastened to upper sector edge. Both winches are secured to rotary platform, which may rotate in horizontal plane with respect to main watercraft body. Distance between steel wire rope branches exceeds vessel width. Additional angle pulley diameter exceeds that of angle pulley of rear haulage rope. Both pulleys are in axial alignment with each other and provided with means, which prevents rope dislodgement.

EFFECT: increased efficiency of concretion production equipment due to decreased labor inputs and increased concretion output.

6 dwg