DREDGER Russian patent published in 1995 - IPC

FIELD: fishery; catch of bottom-dwelling organisms; extraction of solid mineral resources. SUBSTANCE: dredger has a wedge-shaped frame with vertical brackets, s strengthening boom with rests arranged along the wedge apex, and a collector-sack with an opening formed by its upper and lower recesses. The sack edges are elongated as wings, and they are attached to the vertical brackets. The dredger also has protective nets attached to the frame. the sack is provided with struts fastened in its center and tail part, and the brackets are joined by means of booms supporting a wing that forms the flow. A stabilizing plate is attached to the frame and side edges of the sack. The flow-forming wing and stabilizing plate are located in symmetry relative to the frame longitudinal axis. the side wings are provided with struts, and the sack also has protective curtains hinged to the sack so that their front edges overlap. The booms differ in diameter, and the curtains have holes matching the sack cells in size. Edges of the holes have protuberances. The dredge does not damage the bottom-dwelling biocenosis. EFFECT: higher catching ability. 4 cl, 7 dwg