Class / Patent application number | Description | Number of patent applications / Date published |
055294000 | Relatively movable pneumatic nozzle (e.g., scanning nozzle) | 6 |
20090056288 | METHOD AND APPARATUS FOR CLEANING DIESEL PARTICULATE FILTERS AND FOR DIAGNOSING DAMAGE THERETO - An apparatus for pneumatic cleaning of diesel particulate filters (DPF). First and second nozzle members direct flows of compressed air into the axially-extending filter cells from both ends of the filter, the nozzle members generally being offset so as to avoid blowing directly towards one another. The flows form the nozzles impinge only relatively small areas of the end faces of the filter media, e.g., only one or a few cells at a time. The nozzle members are moved over substantially the entirety of the first and second end faces, so that as cleaning progresses compressed air is directed into substantially all of the filter cells from opposite directions. The nozzles may be translated on reciprocated arms while the filter is rotated simultaneously on a turntable or rollers, so that the nozzles sweep over the whole surface of each end; other mechanisms, such as various combinations of gears or pistons, may be used for relative movement between the nozzles and filters. Also, the nozzle members may have single or multiple nozzles. The filter and nozzles are housed within a cabinet having one or more windows therein, which enable an operator to view progress of the cleaning process and determine when it is complete. Visual observation and also enables an operator to identify filters having damaged media, as indicated by particulate material billowing from both ends of the filter due to cracked or broke axial cells. The dislodged particulate material is withdrawn from the cabinet by an exhaust duct system. | 03-05-2009 |
20090217630 | CLEANING NOZZLE FOR DUST COLLECTOR - A particulate filtration device having a cleaning assembly including the cleaning nozzle that accelerates gas toward the downstream surface of the filter media. The cleaning nozzle comprises an inlet portion defining a converging inlet path, a throat portion defining a narrowest portion of the nozzle, and an outlet portion defining a diverging path and ending at an exit edge. The inlet portion, throat portion, and outlet portion collectively create an inner surface of the nozzle. The nozzle defines a centerline and an exit half angle relative to the centerline, and the exit half angle is about ten degrees. The nozzle has a throat area at the throat portion and an exit area at the exit edge. A ratio of the exit area to the throat area is about 1.4. A portion of the inlet portion adjacent the throat portion has a throat inlet radius, and a portion of the outlet portion adjacent the throat portion has a throat outlet radius. The throat outlet radius is larger than the throat inlet radius. For example, a ratio of the throat outlet radius to the throat inlet radius is about 2.9. | 09-03-2009 |
20090272082 | DUST COLLECTOR WITH EQUALIZED CLEANING PERFORMANCE - A particulate filtration device comprising filter media having upstream and downstream surfaces, a gas-moving device for moving gas through the filter media from the upstream surface toward the downstream surface, and a cleaning assembly including a blow pipe having a plurality of cleaning nozzles for directing a flow of cleaning gas toward the filter media. A first one of the cleaning nozzles comprises a structural characteristic (e.g., throat size, exit angle, exit size) that is different than a second one of the cleaning nozzles. In one embodiment, the filter media comprises a filter bag corresponding with each nozzle, and both the first one and the second one of the cleaning nozzles are spaced substantially the same distance from the corresponding filter bag. The cleaning assembly can also include a plurality of blow pipes (e.g., each having a plurality of cleaning nozzles) coupled to a gas-pressurized manifold, and a valve positioned between the manifold and each blow pipe to control gas flowing from the manifold to the blow pipes. In this configuration, it is preferred that the nozzle nearer the manifold has a larger throat size, smaller exit angle, and larger exit size than the nozzle farther from the manifold. | 11-05-2009 |
20100263337 | FILTER CARTRIDGE; COMPONENTS THEREOF; AND METHODS - Z-filters capable of cleaning particulate matter from airflow streams in dust collectors, including reverse flow, reverse air, and reverse pulse systems. | 10-21-2010 |
20110005176 | PORTABLE APPARATUS FOR CLEANING AIR FILTERS - An apparatus for cleaning an air filter includes a body, a closed chamber formed within the body, a fluid dispersing member having a portion thereof mounted for rotation within the body and passing through the chamber, a plurality of orifices formed through the wall of the fluid dispersing member and an arrangement for rotating the fluid dispersing member. The arrangement either includes a combination of nozzles secured to the fluid dispersing member and positioned within the chamber and an irregular inner wall surface of the chamber capable of providing resistance to a fluid flow discharged into the chamber or fins disposed on the fluid dispersing member and a passageway through the body for directing fluid under pressure onto the fins. Fluid supplied under pressure to the fluid dispersing member exits through the plurality of orifices toward an inner surface of a air filter filtering medium causing contaminants to exit therefrom. | 01-13-2011 |
20110138756 | Gas Filter System - The invention relates to a gas filter system having a plurality of tubes being suspended at one end at a carrier plate in a filter chamber that is flowed through by gas, said tubes having a lateral surface made from a filter material, said tubes being flowed through radially from the outside to the inside by a gas to be filtered, and guiding the gas filtered in this manner to a collecting space formed above the carrier plate, wherein openings formed by the tube ends for accommodating the carrier plate are disposed in a circular surface of the carrier plate. | 06-16-2011 |