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US 4,058,465 AGranted
Filter for fish pond
AssigneeLois Enebrad
InventorPaul McKee
Life of this patent
Estimating the term…
Abstract
A filter structure includes a central perforated cylinder surrounded by flexible separable filter units of self-standing porous material through which water is drawn by a pump connected to a cylinder for filtering algae and the like from the water. The central cylinder is apertured at the junction of separate filter units so that water may be drawn through the structure even though the filter units become clogged with filtered material.
Claims3
An improved filtering device comprising
- a laterally apertured pipe having one end thereof closed and the other end thereof adapted for connection to the inlet of a suction pump,
- a plurality of filter pieces of centrally apertured dimensionally stable and resiliently flexible porous material disposed about said apertured pipe with said pipe extending through the central aperture of each piece and said filter pieces being disposed in contiguous relation about all of the lateral apertures of said pipe,
- means retaining said filter pieces in position about said pipe, and
- the separation of apertures in said central pipe being related to the dimensions and positions of said filtering pieces about said pipe so that at least some of the contiguous edges of filter pieces are aligned with lateral apertures in said pipe whereby liquid may be drawn into said pipe between said filter pieces as the filter becomes clogged.
1 more element
Dependencies are inferred from the claim text.