Patent application number | Description | Published |
20090045106 | WATER TREATMENT SYSTEM - A water treatment system (“WTS”) includes a prefilter, a carbon block filter and a microbiological interception (“MI”) filter that operate in combination to treat a fluid stream, such as water. The WTS may include two prefilters, for example, both a multi-layer nonwoven prefilter and a pleated fabric prefilter. The MI filter may include carbon particles and a binder, and the carbon particles may have a mean particle diameter ranging from about 60 microns to about 80 microns and with a particle size distribution in which no more than about 10% by weight of the particles are larger than about 140 mesh and no more than about 10% by weight are smaller than about 500 mesh. In one embodiment, the water treatment system further includes a volumetric end-of-life filter monitor that monitors the life of the MI filter. | 02-19-2009 |
20110303589 | GRAVITY FEED WATER TREATMENT SYSTEM - A portable water treatment system includes at least one sub-system to treat water including a flocculation system, a chlorination system, and a bio-sand filter system. The water treatment system may include multiple sub-systems for treating water that feed into one another. The sand filter system may include a mini bio-sand filter, a foam filter, or a pressed block filter. The flocculation system may include a tank bottom that urges settling particles toward a sump and a ladle that removes settled particles. A manual pump or siphon may be included in the water treatment system. | 12-15-2011 |
20120001562 | INDUCTIVELY COUPLED BALLAST CIRCUIT - A ballast circuit is disclosed for inductively providing power to a load. The ballast circuit includes an oscillator, a driver, a switching circuit, a resonant tank circuit and a current sensing circuit. The current sensing circuit provides a current feedback signal to the oscillator that is representative of the current in the resonant tank circuit. The current feedback signal drives the frequency of the ballast circuit causing the ballast circuit to seek resonance. The ballast circuit preferably includes a current limit circuit that is inductively coupled to the resonant tank circuit. The current limit circuit disables the ballast circuit when the current in the ballast circuit exceeds a predetermined threshold or falls outside a predetermined range. | 01-05-2012 |
20120132575 | FOAM WATER TREATMENT SYSTEM - A foam filter is provided that may form a radial flow or a stacked flow filter. In the radial flow configuration, the foam may be wrapped around an inner support core. The inner support core may define holes to allow the water to enter the support core and exit the filter. More than one foam layer may be used, and a single sheet of foam wrapped in a spiral may form a multi-layer configuration. A non-permeable flexible layer may be positioned between adjacent foam layers to facilitate flow through the filter. In the stacked flow configuration, multiple foam layers may be used and water can flow successively or simultaneously through the foam layers. Functional layers may be added to provide other filtration functions. | 05-31-2012 |
20120145618 | GRAVITY FEED WATER TREATMENT SYSTEM WITH OXIDATION AND DISINFECTION STEPS - A portable water treatment system includes at least one sub-system to treat water including a primary disinfection system and a residual disinfection system. The water treatment system may include multiple sub-systems for treating water that feed into one another. The residual disinfectant may be administered to the water at a level below the taste threshold to prevent backgrowth of bacteria while leaving the taste of the water unaffected. The portable water treatment system may be designed to dispense water at a high-flow rate. | 06-14-2012 |
20120186658 | WATER TREATMENT SYSTEM - A water treatment system is provided including a disinfection system, a filter and a turbine generator. A manual pump is positioned downstream of the filter to create negative pressure to draw water through the filter. The manual pump also creates positive pressure to dispense treated water from the outlet of the system. The movement of the water through the system powers the turbine generator. The power generated can be used to monitor a characteristic of the water treatment system. | 07-26-2012 |
20140077696 | INDUCTIVELY COUPLED BALLAST CIRCUIT - A ballast circuit is disclosed for inductively providing power to a load. The ballast circuit includes an oscillator, a driver, a switching circuit, a resonant tank circuit and a current sensing circuit. The current sensing circuit provides a current feedback signal to the oscillator that is representative of the current in the resonant tank circuit. The current feedback signal drives the frequency of the ballast circuit causing the ballast circuit to seek resonance. The ballast circuit preferably includes a current limit circuit that is inductively coupled to the resonant tank circuit. The current limit circuit disables the ballast circuit when the current in the ballast circuit exceeds a predetermined threshold or falls outside a predetermined range. | 03-20-2014 |