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Class Information
Number: 210/278
Name: Liquid purification or separation > Particulate material type separator, e.g., ion exchange or sand bed > With rehabilitation means > Backwash or blowback means > Flow controller external of closed casing > Multi-way valve unit
Description: Apparatus in which a single valve controls communication with three or more flow lines.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7549446 |
Multi-functional flow control valve for water treatment systems |
Jun. 23, 2009 |
| 7491321 |
Oxidation tank control valve assembly and systems and methods for replenishing a charge of oxygen-containing gas within an oxidation tank |
Feb. 17, 2009 |
| 7468134 |
See-thru self cleaning biological filter system for aqua-culture |
Dec. 23, 2008 |
| 7364654 |
In-home water treatment system |
Apr. 29, 2008 |
| 7332080 |
Apparatus for salt free water softening |
Feb. 19, 2008 |
| 7300569 |
Water treatment system |
Nov. 27, 2007 |
| 7297256 |
Pressure gradient dosing system for fluid supply |
Nov. 20, 2007 |
| 7156995 |
Aeration tank control valve system |
Jan. 2, 2007 |
| 7081200 |
Swimming pool filter |
Jul. 25, 2006 |
| 6878293 |
Automatic valve assembly for water circulation systems |
Apr. 12, 2005 |
| 6787042 |
Automated radionuclide separation system and method |
Sep. 7, 2004 |
| 6776913 |
Water softening method and apparatus for use therewith |
Aug. 17, 2004 |
| 6709574 |
Fish pond filter system |
Mar. 23, 2004 |
| 6644349 |
In-tank water conditioner valve |
Nov. 11, 2003 |
| 6627070 |
Apparatus for aeration in a water filter system |
Sep. 30, 2003 |
| 6447678 |
Regeneration of water treatment media |
Sep. 10, 2002 |
| 6413423 |
Liquid treatment apparatus with backwash flow control valve |
Jul. 2, 2002 |
| 6398954 |
Multimedia backwashable filtration system |
Jun. 4, 2002 |
| 6293298 |
Water softener valve |
Sep. 25, 2001 |
| 6254772 |
Backwashable filtration system |
Jul. 3, 2001 |
| 6245233 |
Water filtering apparatus with water flow switch valve device |
Jun. 12, 2001 |
| 6238556 |
Filtration system including a back washable pre-filtration apparatus |
May. 29, 2001 |
| 6231763 |
Regeneration of water treatment media |
May. 15, 2001 |
| 6103108 |
Water treatment apparatus |
Aug. 15, 2000 |
| 6056873 |
Management of a body of water |
May. 2, 2000 |
| 6042729 |
Regeneration of water treatment media |
Mar. 28, 2000 |
| 6001262 |
Cascade ion exchange for high purity water production |
Dec. 14, 1999 |
| 5937903 |
High performance diverter valve |
Aug. 17, 1999 |
| 5891332 |
Magnetic filtration apparatus for purifying water |
Apr. 6, 1999 |
| 5879559 |
Valve controller for water conditioning system |
Mar. 9, 1999 |
| 5858219 |
Cooling tower water treatment system |
Jan. 12, 1999 |
| 5779771 |
Rotating flow distributor assembly for use in continuously distributing decontamination and regeneration fluid flow |
Jul. 14, 1998 |
| 5744040 |
Apparatus and method for removing dissolved hydrogen sulfide from water |
Apr. 28, 1998 |
| 5693219 |
Apparatus for backwashing a water filter |
Dec. 2, 1997 |
| 5628899 |
Control mechanism for controlling regeneration of two water treatment tanks |
May. 13, 1997 |
| 5597479 |
Electro-coalescence/magnetic separation (ECMS) system and components for removal of contaminants from water streams, including desalinization |
Jan. 28, 1997 |
| 5505844 |
Swimming pool backwash filter |
Apr. 9, 1996 |
| 5320750 |
Water clarifier with first filtrate isolation, improved backwashing and improved bubble generation |
Jun. 14, 1994 |
| 5288399 |
Gravity flow filter with backwash control chamber |
Feb. 22, 1994 |
| 5256283 |
Water conditioner system with injector valve |
Oct. 26, 1993 |
| 5212205 |
Regeneration of deep bed condensate polishers |
May. 18, 1993 |
| 5174337 |
Water conditioner rotary valve |
Dec. 29, 1992 |
| 5162080 |
Rotary flow control valve |
Nov. 10, 1992 |
| 5118418 |
Rotary multi-port platter valve and filter assembly |
Jun. 2, 1992 |
| 5116491 |
Comprehensive water treatment system |
May. 26, 1992 |
| 5089117 |
Apparatus for sequentially backwashing a plurality of seriate filter beds |
Feb. 18, 1992 |
| 5057214 |
Filtration and backwash control system for water filters associated with spigot faucets |
Oct. 15, 1991 |
| 5045187 |
Regeneration system for water conditioners such as water softeners |
Sep. 3, 1991 |
| 5045196 |
Apparatus for pre-concentration of a sample for spectroscopical reasons |
Sep. 3, 1991 |
| 5013882 |
Labyrinth filter for dielectric of spark erosion systems |
May. 7, 1991 |
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