B - Operations – Transporting – 61 – D
Patent
B - Operations, Transporting
61
D
302/29, 222/110.
B61D 7/04 (2006.01)
Patent
CA 1074369
Abstract of the Disclosure A discharge outlet for attachment to the bottom of a hopper which has a longitudinally extending discharge open- ing between spaced inner edges of the outlet side walls. An elongate control valve is mounted for rotation about a hori- zontal axis in the discharge opening between a pair of longi- tudinally extending parallel seats on opposed sides of the valve, and the control valve has its axis of rotation closer to one side of the control valve than to its other side where- by from a closed position weight of lading on the valve urges the valve in one direction of rotation to an open position in which lading is discharge about both sides of the control valve. The control valve includes a body portion extending longitudinally in the discharge opening, and a moment portion extending transversely and eccentrically relative to the axis of the rotation of the body portion. The body portion includes a body portion edge which in closed position engages or is closely adjacent to a body portion valve seat located on or attached to the near side wall. A moment portion valve seat is provided on or attached to the opposite side wall, trans- versely spaced from the control valve. The control valve moment portion includes a moment portion edge which in closed position seats on or adjacent to the moment portion valve seat. The control valve is rotated to move the valve from the closed to open position in which the body portion edge is spaced from the body portion valve seat and the moment portion edge is spaced the moment portion valve seat. The weight of the lading acting on the eccentrically mounted portion creates a moment about the control body portion which reduces the torque re- quired to move the control valve to the open position. The control valve is preferably also movable to a metering posi- tion in which the body portion is spaced from the body portion valve seat, while the moment portion remains in engagement with or closely adjacent to an extension of the moment portion valve seat, to allow controlled lading discharge between the body portion and the body portion valve seat. The body por- tion preferably has an arcuate upper surface with its center coincident with the axis of rotation and is movable from the closed to the open position without substantial upward dis- placement of lading. The frictional resistance of the lading on the arcuate upper surface of the body portion effectively counterbalances the unbalanced force urging the valve to the open position, thereby to permit rotative movement of the control valve to open position with a controlled minimum torque.
300603
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