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| Number | Title | Issue Date |
| 7204930 | Water purification system and method An oxidation filtration system for cleaning groundwater, the system having an aeration tower and a filtration tank. Within the filtration tank is an upper chamber and a lower chamber. Contained within the lower chamber is a plurality of Styrofoam™ filter media. Se... | 04/17/2007 |
| 7101519 | Zirconium basic carbonate and methods of making the same Methods of making zirconium basic carbonate are further described which involve titrating an aqueous slurry of sodium zirconium carbonate to a pH of from about 3.5 to about 4.0 with an acidic agent wherein the sodium zirconium carbonate has a moisture content of fro... | 09/05/2006 |
| 7045057 | Preparation of homogeneously loaded ion exchangers A process for preparing an ion-exchangeable media within a moving-bed or simulated moving-bed device, which can create a true or simulated media flow, comprising the steps of packing the bed with ion-exchangeable media and passing a solution, containing a mixture of... | 05/16/2006 |
| 7033498 | Cartridges useful in cleaning dialysis solutions Cartridges useful in regenerating or purifying dialysis solutions are described as well as methods to regenerate or purify spent dialysis solutions. Dialysis systems using the sorbent cartridges of the present invention are further described. ... | 04/25/2006 |
| 6962657 | Water treatment system A water treatment system for removing hard ions from source water. The water treatment system is of the type that includes a pair of ion-exchange water softener tanks connectable to a source of pressurized water and with a water system to supply softened water to th... | 11/08/2005 |
| 6913590 | Apparatus and method for peritoneal dialysis An apparatus and method for treatment of end stage renal decline and failure through peritoneal dialysis enabling ambulatory transfer of dialysate to and from the peritoneum of a renal patient, this in synthesis and coordination with normal physiological rhythms of ... | 07/05/2005 |
| 6596159 | Automatic regeneration valve for water softener A regeneration valve 131 is adapted for automatic activation of ion exchange resin in a water softener. The regeneration valve includes a switching valve 1, a control valve 32, a water injection valve 54, a cam mechanism (FIG. 13) and a timer mechanism wh... | 07/22/2003 |
| 6468421 | Bag filter wash-down system with vacuum break pulse A filtering assembly for removing particles from a liquid is positioned coaxially within a vertical, pressure-tight housing 11 having a tangential inlet 21 at an upper end and an outlet 24 at a bottom end thereof. The filtering assembly includes a filter ... | 10/22/2002 |
| 6444127 | Water conditioning unit control valve A highly versatile drive arrangement that drives a linearly reciprocating piston of a water conditioning unit control valve without imparting any significant side loads on the support structure for the piston's drive rod or the associated seals. The drive... | 09/03/2002 |
| 6402944 | Water softener control valve with removable seal stack A seal stack, configured for supporting, guiding, and sealing a piston of a water softener control valve or the like, can be preassembled prior to its insertion into the associated valve bore and compressed after it is inserted into the bore. This post-as... | 06/11/2002 |
| 6235200 | Method and apparatus for controlling recharging of water conditioning apparatus A controller and corresponding method have been developed for controlling recharging of a water conditioning apparatus. The apparatus includes an input component for receiving measurements of water usage by the apparatus, a storing component configured to... | 05/22/2001 |
| 6036866 | Apparatus and method for fluid treatment units connected in parallel An apparatus and method for operating a system of two or more fluid treatment units connected in parallel, which fluid treatment units need to be regenerated as they become depleted, whereby a method is provided for determining when to initiate a regenera... | 03/14/2000 |
| 5910244 | Adaptable control valve for fluid treatment system A control valve for a fluid treatment system, such as a water softener or a water filter, includes a manifold which mounts a pair of open-ended, cylindrical valve bodies having ports in fluid communication with passages in the manifold. Interchangeable si... | 06/08/1999 |
| 5908549 | Filtration and regeneration system A filtration and regeneration system for in-line filtration of dirt and impurities from a brine/solution having contaminant flushing capabilities and a direct non-saturated feed of liquid resin cleaners to resins or filter media. An alternate embodiment i... | 06/01/1999 |
| 5879559 | Valve controller for water conditioning system A control unit for operating a valve system in a water conditioner system includes a drive motor having an output shaft coupled to the valve system, a valve position slide switch, an electronic regeneration controller, and a settable mechanical clock. The... | 03/09/1999 |
| 5873996 | Community drinking water purification system This invention comprises a process and apparatus for producing purified drinking water from surface or ground fresh water sources using no chemical pretreatment or coagulants, by usage of a positively-charged filtration media to attract the typically nega... | 02/23/1999 |
| 5792342 | Apparatus for coordinating chemical treatment of sewage A method and apparatus for treating nuisance odor streams is provided. One embodiment of the invention is directed to a method and apparatus in which deodorizing chemical agents are applied to an evaporative reaction pack situated within a gas chamber hav... | 08/11/1998 |
| 5589058 | Apparatus for treatment of water The invention is directed to a water treatment system including a treatment tank having an ion-exchange mineral bed or filter bed therein, and a valve head assembly disposed on top of and in fluid communication with the treatment tank. The valve head asse... | 12/31/1996 |
| 5556535 | Filtration system for recycling water used in a car wash The invention relates to a method for the purification of a polluted liquid, especially a washing liquid used at a washing installation, by sucking the polluted liquid and leading it through at least one filter and next leading back the liquid purified th... | 09/17/1996 |
| 5544072 | Method for regeneration of a water softener A demand initiated method for regenerating a water softener which operates the softener ion exchange bed over a capacity range in which the resin is most efficiently restored by exposure to brine. The reserve capacity of the softener is adjusted in respon... | 08/06/1996 |
| 5538640 | Pervaporation apparatus and process A pervaporation apparatus and process adapted to handle a diverse range of feed stream compositions and volumes. The apparatus includes a pervaporation unit and condenser, one or more tanks and a control system to direct liquid flows within the apparatus ... | 07/23/1996 |
| 5480555 | Control system for a water softener, control device therefor and methods of making the same A control system for a water softener, control device therefor and methods of making the same are provided, the system comprising a microcontroller operatively interconnected to an output of a comparator to effect a subsequent operation of a recycling uni... | 01/02/1996 |
| 5451314 | Plant for the treatment of drinking water from raw water A plant (200) for treatment of drinking water from raw water has a treatment tank (202) which is supplied with raw water and a storage tank (204) placed downstream of the treatment tank. The treatment tank supplies water on demand to a point of use (224).... | 09/19/1995 |
| 5320747 | Apparatus for removing solid matter from fluid systems A method and apparatus for removing solid matter from fluid systems which does not require system shutdown and minimizes the loss of system fluids. The invention first isolates the solid matter collection reservoir from the fluid system and then purges th... | 06/14/1994 |
| 5273070 | Water treatment apparatus Water treatment apparatus having a raw water inlet and a treated water outlet and at least a first and second water treatment tank plus conduit means for passing water from the inlet to the outlet through the first and second tanks in parallel flow relati... | 12/28/1993 |
| 5256371 | Method and arrangement for disinfecting a dialysis fluid circuit Not only the dialysis machine, but also its outer supply conduits and connection tubes together with the associated water distribution system can be flushed and disinfected in the present disinfection method by including these members in the cleaning circ... | 10/26/1993 |
| 5234601 | Apparatus and method for controlling regeneration of a water treatment system A water treatment apparatus has a tank that contains a resin bed through which water flows. The apparatus is controlled by occasionally measuring the conductivity of the resin bed at two spaced apart locations to produce first and second conductivity meas... | 08/10/1993 |
| 5202016 | Streaming current detector with head-creating passageway and fluid treatment system using same A device for detecting and monitoring the charge condition of finely divided solid charged particles in a fluid-flow is so devised as to accept the continuous and full volumetric flow of the fluid and to automatically and repeatedly sample and measure the... | 04/13/1993 |
| 5176836 | Regenerable biocide delivery unit A method and apparatus are disclosed for maintaining continuous, long-term microbial control in the water supply for potable, hygiene, and experimental water for space activities, i.e., space shuttle, orbiter lab, Lunar base, Mars base, deep space mission... | 01/05/1993 |
| 5139655 | Integrated system marine sanitation device A sanitation system, particularly for use in vehicles such as marine vessels (boats), trains, planes, etc. Into a holding tank with a sloping bottom containing sewage from a toilet system, such as a vacuum toilet system, about eight ounces of deodorant ch... | 08/18/1992 |
| 5089140 | Comprehensive water treatment system In its broadest aspects, a method for the cyclic regeneration of a water softening system is disclosed. The water softening system comprises an exchange medium in a tank which is in fluid communication with a brine storage tank. This method comprises the ... | 02/18/1992 |
| 5073255 | Water treatment apparatus Water treatment apparatus having a raw water inlet and a treated water outlet and at least a first and second water treatment tank plus conduit means for passing water from the inlet to the outlet through the first and second tanks in parallel flow relati... | 12/17/1991 |
| 5069796 | System for removing volatile components from water derived from wells A unitized system for the processing of well water that is contaminated with volatile substances, such as organic substances, at a site where the contaminated water exists. This system has the primary components thereof mounted on a skid/frame that can be... | 12/03/1991 |
| 5064529 | Apparatus for testing membrane filters A membrane filter testing apparatus uses a control circuit for increasing the pressure at the primary side of a membrane filter fixedly accommodated in a housing and wetted with a liquid, by a gas at a predetermined rate, and checking whether the pressure... | 11/12/1991 |
| 5061372 | Water treatment system with preservice rinse A water treatment system is provided including a service step, a regenerating step and a rinse step. The service step includes introducing water to be treated into the inlet, through a treatment medium and out the outlet to a service location. If a prolon... | 10/29/1991 |
| 5045187 | Regeneration system for water conditioners such as water softeners A regenerating control system for liquid conditioners includes ball valves positioned and sized so that they do not cause any flow restriction during the normal operation of the conditioner. The valves are operated by low voltage D.C. motors which require... | 09/03/1991 |
| 4970003 | Water softening process with preservice rinse A water softening system is provided including a service step, a regenerating step and a rinse step. The service step includes introducing relatively hard water into the inlet, through an ion exchange resin and out the outlet to a service location. The re... | 11/13/1990 |
| 4925551 | Portable water purification system including electronic memory panel assembly An electronic memory panel assembly controls the operation of a portable water purification system which has a reverse osmosis unit having an inlet. The assembly includes a solenoid device with piping having an inlet end fitting for attachment to a source... | 05/15/1990 |
| 4917794 | Regeneration sensing device The disclosure herein describes an apparatus for determining the state of water softening material and water in a water softening tank with a view to determining when regeneration of the water softening material is needed. Top and bottom primary sets of e... | 04/17/1990 |
| 4883589 | System for removing contaminants from ground water A system for removing contaminants from ground water, includes a plurality of tubular members made of a liquid pervious fabric material and having a rigid plastic core therein; a contaminant-absorbing material in each tubular member; an anchor cap secured... | 11/28/1989 |
