UNIT FOR MINING IRON-MANGANESE CONCRETIONS Russian patent published in 1994 - IPC

FIELD: sea mining. SUBSTANCE: unit comprises hollow cylindrical casing open at the bottom and provided with side openings, load grabs installed on casing, and flexible hanger for connection to service vessel. Unit has drive shaft with wrenching head, installed along casing axis, blade working wheel secured by coil spring on casing and on bushing having profiled hole, locking mechanism of coil spring in the form of jaw coupling and stop. Load grabs have the form of cylindrical springs with plugs disposed on side openings of casing. Flexible length limiters of cylindrical springs are also secured on casing. EFFECT: improved design. 2 cl, 4 dwg