Apparatus for cleaning a diesel particulate filter with...

Gas separation – With nonliquid cleaning means for separating media – With automatic control of cleaning means

Reexamination Certificate

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C055S294000, C055S302000, C055S315000, C055S467000, C055S482000, C095S279000, C095S281000, C095S283000, C096S417000, C096S421000, C210S411000, C210S413000

Reexamination Certificate

active

11402303

ABSTRACT:
The present invention is directed to a filter cleaning device, in particular, diesel particulate filters. In one embodiment, the device includes a source of high pressure fluid and a mechanism transport the fluid to a nozzle or nozzles; an actuator for moving the nozzles; a controller with logic for instructing the actuator to automatically move the nozzle or nozzles across the surface of the filter; a collection device and suction device downstream of the filter; and ducting to transport the fluid between parts of the system. In one embodiment, a second collection device is used downstream of the suction device to provide additional particulate removal. There are three methods proposed for providing high pressure cleaning fluid to the filter face: 1) rotating the filter and rotating the jet about an axis outside of the filter; 2) moving a nozzle in two perpendicular directions (i.e., x-y); and 3) rotating a radial nozzle about the central axis of the filter.

REFERENCES:
patent: 4614581 (1986-09-01), Drori
patent: 5421845 (1995-06-01), Gregg et al.
patent: 5514270 (1996-05-01), Barzuza

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