| 摘要 |
A mechanical device for automatically positioning a closure plate for sealin g the opening created by the folding of adjacent segments of an articulated chute to thereby prevent undesired discharge or leakage from the chute is provided. The device, which is particularly useful on cement trucks, include s a closure plate rotatably connected to one segment of the chute and disposed to articulate upon an adjacent segment of the chute so that the closure plat e seals the opening when the chute is in a folded configuration and, when the segments are unfolded to deliver a charge, rotates to a position clear of th e discharge path. The device also includes means for sealably biasing the closure plate toward the opening when the segments are folded and for biasing the closure plate away from the discharge path when the segments are in an unfolded position.
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