| 摘要 |
An assembly for selectively closing a pneumatic discharge outlet, comprises a closure cap which, in a closed position, fits about and partially along to cover a free end of said hopper discharge outlet and which is movable to an open position relati ve to the free end of said hopper discharge outlet; structure for connecting said closure c ap to one side of the free end of said hopper discharge outlet in a manner permitting pivotal and sliding movements of the closure cap relative to the free end of said hopper dischar ge outlet; and a manually operated lock assembly pivotally attached at an opposite side of the free end of said hopper discharge outlet for cooperating with said structure in releasab ly maintaining said closure cap in said closed position while allowing for one-handed operation to move said closure cap to an open position.
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