Gas separation – With nonliquid cleaning means for separating media – With automatic control of cleaning means
Reexamination Certificate
2008-05-13
2008-05-13
Smith, Duane (Department: 1797)
Gas separation
With nonliquid cleaning means for separating media
With automatic control of cleaning means
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
Edgar Bradley L.
Lemke Richard G.
Rumminger Marc D.
Streichsbier Michael
Wehrley Dean
Brooks & Kushman P.C.
Pham Minh-Chau T.
Smith Duane
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