Patent ID: 7124693

Claim:
An outlet gate assembly adapted to be mounted on a hopper container, said assembly comprising: a frame defining a generally rectangular discharge opening, said frame having a pair of frame side members and a transverse member extending between the side members; an upper gate assembly mounted on the frame, the upper gate assembly including an upper plate having top and bottom surfaces; a lower gate assembly mounted on the frame, the lower gate assembly including a lower plate having top and bottom surfaces; said upper plate being movable in a longitudinal direction between open and closed positions; said lower plate being movable in a longitudinal direction between open and closed positions; wherein the outlet gate assembly has a cavity below the bottom surface of the upper plate of the upper gate assembly and above at least part of the top surface of the lower gate assembly when the upper and lower plates are in the closed positions; a seal between the transverse member of the frame and the bottom surface of the upper plate, said seal extending transversely across at least part of the upper plate; an ultra high molecular weight seal between the transverse member of the frame and the top surface of the lower plate, said seal extending transversely across at least part of the lower plate; an ultra high molecular weight seal between another portion of the frame and the top surface of the lower plate, said seal extending transversely across at least part of the lower plate.