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| Number | Title | Issue Date |
| 7857893 | Air cleaner and shut-down method An air cleaner is provided according to an embodiment of the invention. The air cleaner includes a high voltage power supply configured to provide a high voltage to a collector cell and a shut-down circuit coupled to the high voltage power supply. The shut-down circ... | 12/28/2010 |
| 7704302 | Electrostatic precipitator having a spark current limiting resistors and method for limiting sparking An electrostatic precipitator including: a collecting electrode in a gas passage; a discharge electrode in the gas passage and separated by a gap from the collecting electrode; a power supply applying a voltage to the discharge electrode, wherein the voltage establi... | 04/27/2010 |
| 7357828 | Air cleaner including constant current power supply An air cleaner including a constant current power supply is provided according to an embodiment of the invention. The air cleaner includes a collector cell and a constant current power supply coupled to the collector cell. The constant current power supply is config... | 04/15/2008 |
| 7295418 | Collimated ionizer and method An air ion collimator is added to ionizers with integrated fans that are used to remove static charge. Three mechanisms minimize air ion losses through recombination. Hence, the collimator increases the air ions that are available for charge removal. First, reducing... | 11/13/2007 |
| 7267711 | Electrostatic precipitator for diesel blow-by A compact electrostatic precipitator is designed specifically for use in connection with eliminating particles from crankcase emissions of a Diesel engine. Such emissions may carry solid soot particles as well as suspended oil droplets. The electrostatic precipitato... | 09/11/2007 |
| 7258723 | Particulate filter assembly and associated method A particulate filter assembly includes an electrode assembly, a particulate filter positioned in an electrode gap defined between two electrodes of the electrode assembly, a power supply electrically coupled to the electrode assembly, and a controller for controllin... | 08/21/2007 |
| 7258729 | Electronic bi-polar electrostatic air cleaner An electro-mechanical electrostatic air cleaner that combines a low air resistance dielectric fibrous filter material positioned between and electrically charged by two electrically resistant carbon coated screens. The screens are charged by a remotely mounted bi-po... | 08/21/2007 |
| 7101422 | Polarity reversing circuit for electrostatic precipitator systems A gas separation apparatus using electrostatic precipitators and mechanical rappers is enhanced by the addition of an opposite polarity refreshing power supply and a switching arrangement. The switching components selectively disconnect the primary power supply and ... | 09/05/2006 |
| 7081152 | ESP performance optimization control A gas separation apparatus which uses electrostatic precipitators and a DC power supply is controlled to optimally remove moderate to high resistivity ash. The DC power supply is pulse width modulated to maximize the product of the peak electric field and the averag... | 07/25/2006 |
| 7041157 | Filter system for spreading soot particles from a stream of exhaust gas An apparatus for separating and converting exhaust particulates from a stream of exhaust gas, especially a diesel engine, into gaseous substances, in which the exhaust gas is guided through a honeycomb filter (6) made from a porous ceramic material whose axia... | 05/09/2006 |
| 7001447 | Polarity reversing circuit for electrostatic precipitator system A gas separation apparatus using electrostatic precipitators and mechanical rappers is enhanced by the addition of an opposite polarity refreshing power supply and a switching arrangement. The switching components selectively disconnect the primary power supply and ... | 02/21/2006 |
| 6955708 | Air-treatment apparatus and methods Air-treatment apparatus and methods are disclosed that are especially suitable for treating the air in a room or other dwelling or working space. An apparatus embodiment of the subject apparatus includes a housing having air-intake and air-output openings. A gas-fil... | 10/18/2005 |
| 6951582 | Air purifier device An air purifier device includes a fan unit in an electrically conductive housing for drawing ambient air into the housing via an air inlet, and an electrically conductive dust-collecting member in the housing and disposed adjacent to an air outlet. A detecting unit ... | 10/04/2005 |
| 6471752 | Ionizing structure for ambient air treatment An ionizing structure for ambient air treatment wherein the structure, optionally having ceiling-mounting provisions, incorporates an ionizing element forwardly directed in the direction of airflow through the structure, an electrical power supply coupled... | 10/29/2002 |
| 6336961 | Electric precipitator and electric precipitation electrode used for the same A plurality of discharge electrodes are grouped for respective gas passages that are defined by collecting electrodes (11-15). The discharge electrodes in each group are connected to a common power supply unit for receiving output voltage through a diode ... | 01/08/2002 |
| 6115230 | Method and apparatus for detecting arcs and controlling supply of electrical power A method and apparatus for detecting electromagnetic noise generated by an arc and controlling a power supply that powers the arcs. In an embodiment of the invention, the apparatus includes an arc detection circuit and a power supply control circuit. The ... | 09/05/2000 |
| 4854948 | Supply circuit for electrostatic dust separator The pulse voltage for the electrode (12) of a dust separator (10) is generated by a thyristor circuit (19) to be transferred to a dust separator through a transformer (16). It being possible that voltage arcings take place at the dust separator (10), ther... | 08/08/1989 |
| 4659342 | Method of controlling operation of an electrostatic precipitator A method is disclosed for controlling the operating parameters of an electrostatic precipitator of the type having electrodes energized by pulses superimposed upon a DC-voltage. According to the method, the pulse height (i.e., amplitude) is continuously i... | 04/21/1987 |
| 4605424 | Method and apparatus for controlling power to an electronic precipitator A method and apparatus for controlling power to a precipitator 27. After each spark the power to the precipitator is reduced to zero, increased along a fast ramp 15 for a fixed period of time and then increased along a slow ramp 17 until a spark occurs. T... | 08/12/1986 |
| 4410849 | Electric dust collecting apparatus having controlled intermittent high voltage supply In an electric dust collecting apparatus of the type that a dust collecting effect is achieved by applying a high D.C. voltage between dust collecting electrodes, wherein the high voltage is controlled via a typical power control device including thyristo... | 10/18/1983 |
| 4354152 | Method for automatic control of the voltage of an electrostatic filter at the breakdown limit A method for controlling the voltage of an electrostatic filter at the breakdown limit in which, when a breakdown occurs, the voltage is reduced by an amount which is determined by the breakdown voltage and the prior history of the breakdown and the waiti... | 10/12/1982 |
| 4326860 | Ripple insensitive electric precipitator A control system for automatically maintaining a maximum output voltage across the electrodes of a precipitator under varying load conditions without requiring manual readjustment of sensitivity controls. A spark threshold detector provides a threshold cr... | 04/27/1982 |
| 4265641 | Method and apparatus for particle charging and particle collecting Method and apparatus for charging and collecting submicron particles. The particles are charged by a needle-to-plate ionizer having offset rows of needles which are spaced from the plate such that voltage gradients of 6 KV/cm and higher are achieved. Need... | 05/05/1981 |
| 3980455 | Particle charging device and an electric dust collecting apparatus making use of said device A particle charging device is herein disclosed in which discharge electrodes and opposite electrodes are disposed in an opposed relationship, third electrodes being provided in the proximity of each said discharge electrode, and there are provided a high ... | 09/14/1976 |
