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7513993 Filter devices including a porous body  
Fluid filter devices include at least one porous body. In one example, the fluid filter device can be incorporated as part of a fluid filter apparatus. The fluid filter apparatus can include a...
7252761 Filtration installation for filtering the water of a water pool  
A filtration installation for a swimming pool ( 2 ) comprising a filter vessel ( 4 ) containing a filter bed ( 5 ), an inlet pipe ( 6 ) extending between the pool and the filter vessel, a return...
7018547 Filtration covering apparatus  
A filtration covering apparatus for use covering diatomaceous earth filter grids for swimming pools. The filtration covering apparatus has a replaceable cover having two closed sides, a bottom...
6238556 Filtration system including a back washable pre-filtration apparatus  
A filtration system for filtering particulate matter from a liquid, the filtration system comprises a pre-filtration apparatus and a main filtration apparatus. The pre-filtration apparatus...
6143186 Device for continuous filtration of liquids  
A continuous filter device for liquids has a filter chamber that receives a granular bulk material forming a filter bed. The filter chamber has rectangular inner-walls with a liquid-permeable inlet...
6056873 Management of a body of water  
The installation disclosed comprises a body of water, a pump, a filter and pipes connecting the body of water, pump and filter. Additional pipes lead from the pipe to the return pipe and to waste....
5980761 Filter system and a cartridge containing a cellular granular material  
The main application of the invention lies in making cartridges, filters and complete filter systems for regeneration purposes, in particular for regenerating swimming pool water, and for that...
5882528 Method for extending useful life of filter aid in a filter with hydraulically deformable system  
A device for filtering fluid includes a hollow housing having a fluid inlet and a fluid outlet. A filter element formed of fluid permeable material is disposed within the housing for filtering...
5871641 Fluid filter with pleated septum  
A device for filtering fluid includes a hollow housing (10) having a fluid inlet (26) and a fluid outlet (28). A filter element (50) formed of fluid permeable material is disposed within the...
5804080 Computer controlled method of operating a swimming pool filtration system  
A method of operating a filter system of a swimming pool in proportion to the degree of contamination of the water in said pool by processing a signal representative of the number of persons within...
5762785 Swimming pool filter  
A swimming pool filter including a cylindrical receptacle made of plastic material and casket-forming ends to which a valve head is coupled, the latter to be connected by conduits to a diffusor and...
5759414 Swimming pool main drain assembly  
A swimming pool main drain assembly comprises a cup-shaped fitting recessed in a pool bottom and having an open mouth substantially coplaner with the pool bottom. A port is provided in the fitting...
5730861 Swimming pool control system  
A swimming pool control system automatically controls the daily maintenance functions of a swimming pool. The control system actively monitors system conditions, makes adjustments for abnormal...
5628896 Apparatus for operating a filter arrangement  
A method and apparatus for operating a filter system of a swimming pool in proportion to the degree of contamination of the water in said pool by processing a signal representative of the number of...
5616239 Swimming pool control system having central processing unit and remote communication  
The present invention relates to a control system adapted to control water flow in a swimming pool system including a swimming pool having a filter tank. The pool control system includes a control...
5505844 Swimming pool backwash filter  
A swimming pool backwash filter which separates backwash contaminates from the backwash water so that the may be discarded separately, for connecting to a standard pool filtration system, having a...
5505847 Water circulation system for a multiple mineral bath  
The present invention is a bath which circulates and recycles a multiple mineral solution. The solution is released from the bathtub, filtered at the hair collector and the filtration device,...
5397465 Diatomaceous swimming pool filter with regenerative plates  
A filter including one or more regenerative plates which can be moved along the surfaces of filter grids to simultaneously create turbulence and physically dislodge a filter media cake within the...
5217607 Water decontamination system with filter, electrostatic treatment and UV radiation chamber  
A system minimizing inorganic and organic contaminants in water circulating in a water system comprises a flow-through filter vessel containing a filter medium and whose outlet is connected by a...
5047146 Bidirectional flow vacuum filter for a swimming pool having influent and effluent conduits as structural members  
A swimming pool bi-flow filter has been described herein. The invention includes the following integral structural components: an influent conduit, an effluent conduit, an influent trough and a...
5008008 Universally adaptable pool water filter structure  
A universal swimming pool water filter apparatus for a bottom opening tank comprising multiply useful dual reverse flow port means and cooperating filter medium support having various filtered...
4997558 Suction control filter system for swimming pools  
A suction control filter system for swimming pools is provided, in which the vacuum filter of the water recirculation system features positive suction backwash of the filter during cleaning.
4943211 Sand filter cleaning system  
A sand filter cleaning apparatus includes a suction head having an enlarged intake opening for sucking materials thereinto attached to an exhaust hose for receiving material sucked into the suction...
4902412 Swimming pool water recirculation system  
There is disclosed a water recirculation system for a swimming pool including assemblies installed in the drain openings in the skimmer and lower end of the pool for shredding leaves solely in...
4874509 Oxidation saturation device  
An apparatus and method for dissolving a gas in a liquid comprising a long tube or conduit having an inlet connected to a source of gas and liquid mixed together under pressure and an outlet...
4867874 Device for filtering water from an overflowing swimming pool, using an accumulating tank acting as a gravity filter  
An accumulating tank serving as a filter for an overflowing swimming pool, and more particularly a device for filtering water from an overflowing swimming pool using an accumulating tank acting as...
4657673 Dual filtering system for swimming pools  
A dual filtering system, especially for swimming pools, in which dirt and any large particulates are removed by passing a liquid feed through sand filter bed and minute impurities are then removed...
4652369 Filtering system for swimming pools  
A filter assembly especially suitable for filtering swimming pool water includes an upright tank, and a flexible, cylindrical porous filter bag supported on star shaped core elements which are...
4627118 Vacuum filter for swimming pools controlling water recirculation capacity to accommodate varying gutter flow  
A vacuum filter is provided for vacuum flow filtration through a filter bed of water from a swimming pool including flow from the pool and from the gutter of the swimming pool, and controlling...
4622137 Filtering system for swimming pools, with removable manifold assembly and braided filter grid units  
A filtering system, especially for swimming pools, by which a liquid or gas may be cleansed of suspended particles by passing the liquid or gas, under a pressure differential, through a...
4606819 Swimming pool apparatus  
Improved swimming pool apparatus includes contiguous, separate pool and secondary water chambers. The secondary chamber receives pool surface water via a skimmer weir regulated by the main pool...
4578186 Swimming pool filter system  
A swimming pool filter system is comprised of a pump, a filter and a water conduit means for hydraulically connecting the pump and filter in a hydraulic loop with a swimming pool. The filter is a...
4169793 Tank drain assembly for swimming pool filters  
A tank drain assembly for swimming pool filters is provided characterized by an improved locking and orienting structure individually locking collector tubes into their respective sockets in the...
4127485 Vacuum filter for swimming pools  
A vacuum filter for vacuum flow filtration through a filter bed of water from a swimming pool is provided, comprising an open-top tank; a filter bed of particulate material in the tank; fluid flow...
4105555 Multi-port valve  
A valve is provided adapted to multiple modes of use including filter, backwash, rinse, recirculate, and direct to waste, on a swimming pool filter of the type normally filtering water under...
4002566 Water purifying systems  
A system for purifying water includes flowing the water through a closed path, supporting a bacteria culture in the path of water disposed transversely thereto, and aerating the water in the path...
3969248 Pool filtering system  
A pool filtering system is shown. Dirty water from the pool passes into a stilling or surge chamber under the control of a float valve, then passes through a large particle interceptor screen into...
3957644 In-line filtering device  
An in-line filter unit is provided for use in a circulating fluid system. Such a unit is made essentially into one piece to insure watertight. A debris reservoir is provided to store the debris...
3774772 SWIMMING POOL FILTER  
An improved swimming pool filter is provided which includes arcuately-shaped internal filter elements, and which is constructed to provide a maximum filter area in a given cylindrical housing...
3767050 FILTRATION SYSTEM FOR LIQUIDS  
A filtration system for liquids employs a sealed tank that is partially filled with sand or the like to provide a filtration bed in the lower portion thereof. An underdrain device is buried in the...
3653513 SWIMMING POOL FILTER APPARATUS  
A plurality of generally planar filter elements are arranged in a mutually spaced stack which is mounted within a filtering chamber with the filter elements maintained planarly vertical. The stack...
3622001 SYSTEM AND DEVICE FOR VISUALLY INDICATING THE DEGREE OF CONTAMINATION OF THE FILTER MEDIA IN FILTRATION APPARATUS  
This device provides a visual media for instantly determining the then-filtering capacity of the filter elements or media in a water filtration apparatus. The system includes a bypass channel or...
3618774 COMBINATION SWIMMING POOL FILTER, SURFACE SKIMMER AND WATER LEVEL CONTROL DEVICE  
A swimming pool filter unit comprising filter and sand layers, some of the sand cleanable by removing a containing basket, the unit also having automatic pool fill control and overflow drain means.
3581895 AUTOMATIC BACKWASHING FILTER SYSTEM FOR SWIMMING POOLS  
A pressure-responsive switch senses the rising back pressure in a sand filter caused by debris collected in the filter, and at a predetermined pressure indicating the need for cleaning the filter,...
3550779 SWIMMING POOL FILTER  
3491884 FILTER AND VALVE ASSEMBLY FOR WATER CIRCULATION SYSTEMS  
3487934 SWIMMING POOL FILTER AND HEATER DEVICE  
3420376 FILTER APPARATUS FOR SWIMMING POOL WATER  
3402817 Ballast operated filter  
3365064 Swimming pool system and backwash assembly therefor  
Matches 1 - 50 out of 77 1 2 >