SOLID SELF-REINFORCEMENT HATCH COVER Russian patent published in 2011 - IPC B64C1/14 B63B19/12 B64D1/06 

FIELD: transport.

SUBSTANCE: invention relates to solid self-reinforcement hatch cover. Composite hatch cover comprises first layer that makes hatch cover outer wall with inner surface and second layer that hatch cover inner wall. Second hollow layer serves to make internal reinforcing frame that doubles as a stiffness member of hollow frame with convex beads intended for rigid connection with said first layer. Said frame has side referred to as a top side and connection flanges arranged between said beads and said top side. Said frame is formed by second layer with cutouts defined by stiffness elements that make said frame. Aforesaid frame formed by second layer and first layer form solid self-reinforcement hatch cover.

EFFECT: reduced weight.

11 cl, 9 dwg