Apparatus for controlling movement of flowable particulate material
AssigneeElsie Spry
InventorWILLIAM J. SPRY
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Abstract
The present invention is directed toward various valving arrangements to control the flow of granular material. In one embodiment, a valve is provided which facilitates flow of the material in one direction, but resists flow in another direction. In another embodiment, a retaining wall is provided with a plurality of generally horizontal passageways, which, under normal circumstances, resist passage of the flowable granular material positioned therebehind and, under modified circumstances, can serve as relief valves to avoid pressure on the wall which might cause the wall to move in an undesirable manner. In a third embodiment, a plurality of valving units is provided for beach retention of sand through efficient separation of sand from incoming waves.
Claims16
-20. (canceled)
A beach erosion control system for removing sand from incoming water comprising
- a plurality of generally horizontally oriented, vertically spaced separation units having a wave-deflecting ramp for receiving said sand containing water thereover, a plurality of elongated, generally vertically oriented, relatively spaced barrier plates oriented generally parallel to each other and spaced from said wave deflection ramp, a plurality of elongated slots for facilitating downward transfer of sand, and at least one anchor for securing said unit to said sand.
-35. (canceled)
Dependencies are inferred from the claim text.