Pond filter

Claim 2

For use within a body of liquid, a filter comprising means defining a casing having a chamber therein; said casing having a side wall portion about said chamber and there being a plurality of liquid inlet ports within said side wall portion, first filter means disposed within said chamber within the path of flow of liquid entering through said inlet ports, said first filter means comprising a mesh material wound upon itself into roll form and being coaxial with said casing, second filter means being of block character and of spongeous material provided at one end of said chamber and in planarwise perpendicular relationship to the axis of said first filter means, means defining a liquid collecting receptacle, means enclosing said liquid collecting receptacle coaxially of said casing on the side of said second filter means remote from said first filter means, pump means remote from said casing, conduit means connecting said liquid collecting receptacle and said pump means, third filter means presented intermediate said second filter means and said liquid collecting receptacle, and means maintaining said third filter means under compression.

Claim 3

The invention as defined in claim 1 and further characterized by said means mounting said liquid collecting receptacle comprising a base plate provided on said casing and having an opening therein, said second filter means abutting the inwardly directed face of said base plate, a companion plate fixed to the casing-adjacent portion of said liquid collecting receptacle for disposition in planarwise parallel relationship to said casing base plate, said companion plate having a plurality of perforations, said third filter means being presented between said base plate and said companion plate, and means for securing said base plate and said companion plates together with said third filter means being compressed therebetween.

Claim 4

The invention as defined in claim 1 and further characterized by buoyant means disposed in said casing at the end of said chamber remote from said second filter means, said buoyant material being of predetermined length relative to the length of said casing.

Claim 5

The invention as defined in claim 3 and further characterized by a reflector dome mounted on the exterior of said casing at the end thereof containing said buoyant material for normal presentation of said dome above the level of the body of liquid.

Claim 6

For use within a body of liquid, a filter comprising means defining a cylindrical casing having a side wall, a portion of said side wall being provided with a plurality of liquid inlet ports, a first filter disposed within said casing being coaxial therewith and being constituted of metallic mesh material wound upon itself to provide a multi-layered roll presented against the inner face of said side wall portion containing said inlet ports, said first filter centrally providing a compartment for accepting liquid filtered therethrough, means closing one end of said compartment, a second filter disposed within said casing foR closing disposition across the other end of said compartment and being of block character formed from spongeous material, the main plane of said second filter being perpendicular to the axis of said first filter, a third filter presented adjacent said second filter, being planarwise parallel therewith and formed of compressible foraminous material, means maintaining said third filter in compressed condition, means defining a liquid receptacle presented adjacent said third filter for receiving liquid moving therethrough, and pump means connected to said liquid receptacle for drawing liquid through said filter.

Claim 7

For use within a body of liquid, a filter comprising means defining a cylindrical casing having a side wall, a portion of said side wall being provided with a plurality of liquid inlet ports, a first filter disposed within said casing being coaxial therewith and being constituted of metallic mesh material wound upon itself to provide a multi-layered roll presented against the inner face of said side wall portion containing said inlet ports, said first filter centrally providing a compartment for accepting liquid filtered therethrough, means closing one end of said compartment, a second filter disposed within said casing foR closing disposition across the other end of said compartment and being of block character formed from spongeous material, the main plane of said second filter being perpendicular to the axis of said first filter, a third filter presented adjacent said second filter, being planarwise parallel therewith and formed of compressible foraminous material, means maintaining said third filter in compressed condition, means defining a liquid receptacle presented adjacent said third filter for receiving liquid moving therethrough, and pump means connected to said liquid receptacle for drawing liquid through said filter.

Claim 8

The invention as defined in claim 5 and further characterized by said casing being presented within the body of liquid so that its axis is parallel to the horizontal; support means for positioning said casing within said body of liquid below the liquid surface and spacedly from the liquid body bed.

Claim 9

The invention as defined in claim 6 and further characterized by said support means comprising a pair of parallel plates of substantially triangular configuration engaged at opposite end portions of said casing and having margins for disposition upon the liquid body bed.

Claim 10

The invention as defined in claim 5 and further characterized by said filter being presented vertically within said body of water, and said means closing one end of said compartment being a body of buoyant material received within said casing.