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Class Information
Number: 210/394
Name: Liquid purification or separation > Filter > Movable medium > With cleaning means > Discharging inside, e.g., internal-type drum
Description: Apparatus in which the moving filter medium encloses a space and the cleaning means acts to return residue to said space.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8496117 Self cleaning, continuously operating filter apparatus for fluids Jul. 30, 2013
8236076 Portable apparatus for cleaning air filters Aug. 7, 2012
7638061 Coolant fluid cleaning method, system, and apparatus Dec. 29, 2009
7344637 Apparatus for removing fine material from a liquid Mar. 18, 2008
7293658 Drum filter assembly Nov. 13, 2007
7186281 Dust-removing device for the dust-collecting tank of a dust-collecting machine Mar. 6, 2007
7160443 Apparatus for removing material from a liquid flowing through a channel Jan. 9, 2007
7044307 Drum type paper stock fine screen May. 16, 2006
6651822 Horizontal solids recycler Nov. 25, 2003
6581783 Fine solids separator Jun. 24, 2003
6571959 Coolant fluid cleaning method and apparatus Jun. 3, 2003
6488849 Rotating device for continuously filtering a liquid such as a solution containing a precipitate Dec. 3, 2002
6451213 Methods and apparatus for de-watering sludge Sep. 17, 2002
6432299 Cuttings dryer for removing liquid from a slurry Aug. 13, 2002
6419094 Fixed sequential sprayer for a cylindrical wastewater screen Jul. 16, 2002
6395187 Horizontal solids recycler May. 28, 2002
6338411 Screw drum type filtration device Jan. 15, 2002
6311850 Pressure screening apparatus for screening a paper stock suspension and screen clearer for such a screening apparatus Nov. 6, 2001
6261454 Device for treating, in particular washing, gluten or the like Jul. 17, 2001
6241879 Filtering machine and filter cloth therefor Jun. 5, 2001
6227379 Rotary separator apparatus and method May. 8, 2001
6186340 Cylindrical drum filter having two parallel circular circumferentially spaced support rods Feb. 13, 2001
6183653 Apparatus and method for removing sludge from filter for use in electric discharge machine Feb. 6, 2001
6182833 Reciprocating sprayer for a cylindrical wastewater screen Feb. 6, 2001
6177021 Method and device for clearing the crystalline material out of a centrifuge basket Jan. 23, 2001
5992642 Filtering apparatus and filtering system Nov. 30, 1999
5853585 Rotary separator apparatus Dec. 29, 1998
5817505 Particle settler for use in cell culture Oct. 6, 1998
5804071 Rotating disc filter means Sep. 8, 1998
5798039 Drum filter system with removable filter elements and a pawl rotation mechanism Aug. 25, 1998
5685983 Apparatus for filtering liquids containing particles Nov. 11, 1997
5651881 Fluid recovery assembly Jul. 29, 1997
5641398 Device for removing screened material from a liquid flowing in a flume Jun. 24, 1997
5595655 Self-cleaning filter assembly Jan. 21, 1997
5547573 Device for removing cake or residual layer in a centrifuge Aug. 20, 1996
5500114 Separator device Mar. 19, 1996
5490928 Tandem waterwheel trommel Feb. 13, 1996
5443726 Self-cleaning filter assembly Aug. 22, 1995
5435917 Rotary filter comprising a screen drum and internal screw member Jul. 25, 1995
5380436 Solid-liquid separator Jan. 10, 1995
5296136 Apparatus for separating liquids and solids comprising screens and augers Mar. 22, 1994
5281275 Apparatus and method for enhancing sugar crystal/molasses separation efficiency in a sugar centrifugal Jan. 25, 1994
5227057 Ring centrifuge apparatus for residual liquid waste removal from recyclable container material Jul. 13, 1993
5215656 Rotary self-cleaning strainer Jun. 1, 1993
5178759 Filtration system to remove photoresist film particles Jan. 12, 1993
5139670 Rotating drum filter Aug. 18, 1992
5110461 Apparatus for separating liquids and solids May. 5, 1992
5051195 Method and equipment for filtration of suspension Sep. 24, 1991
5039347 Method for cleaning the filter plates of a suction drier Aug. 13, 1991
5034120 Method for keeping a screen or filter surface clear Jul. 23, 1991

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