| 摘要 |
A filter system for insertion and assembly in a storm drain collection box. The filter includes a frame having a removable back and legs for easy assembly in the storm drain collection box. The frame includes a bed portion which is telescopic so as to be expandable to accommodate the width of the collection box. A sheet of filter medium is placed on the filter bed and back, and the filter frame is then urged against the front of the collection box by pneumatic cylinders. Silt and other debris collects in the filter compartment until full, and then the excess drainage water overflows unrestricted over the back of the filter frame.
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