| 摘要 |
A restorable sand or pellet pile is provided for use as an amusement device. A sand or pellet collection chamber has inclined side walls that converge toward each other in a downward direction and having a bottom surface connected to the side walls to form a collection chamber. A support deck is mounted on top of the side walls of the collection chamber and is adapted to support sand on its upper surface. A safety grating is formed around the perimeter of the support deck to allow sand or pellets to flow downwardly therethrough into the collection chamber as children play on the pile. A diaphragm pump is positioned in the collection chamber and pumps sand upwardly through a vertically extending conduit to restore the pile. The pump may be operated intermittently or continuously. Other pumping mechanisms may be used.
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