1
Warren Thomas Johnson: Backwash method. Siemens Water Technologies, May 10, 2011: US07938966 (31 worldwide citation)

A filtration arrangement including one or more membrane modules (5) positioned vertically within a feed tank (6), each membrane module (5) having one or more membranes positioned therein. An aeration hood (10) having an upper wall (11) and one or more downwardly extending side walls (12, 13) is conf ...


2
Joseph F Giannelli, George C Flynn, Leo F Ryan: Backwash method and apparatus. Ecodyne Corporation, Dressler Goldsmith Shore Sutker & Milnamow, September 20, 1983: US04405466 (29 worldwide citation)

The method and apparatus for filtering a liquid including a filter vessel divided into an upper filter compartment and a lower plenum compartment. An external vessel is positioned at or below the elevation of the tops of the filter element fittings in the plenum compartment. A pressurized gas is sup ...


3
Leo Ryan: Backwash method and apparatus. The Graver Company, Dressler Goldsmith Shore Sutker & Milnamow, May 21, 1991: US05017241 (25 worldwide citation)

A method and apparatus for cleaning filter elements that are vertically positioned within a filter vessel that has a tube sheet dividing the filter vessel into a lower filter compartment and an upper plenum compartment. A fixed volume of backwash liquid is rapidly directed from the plenum compartmen ...


4
Terrance Laterra: Backwash method and apparatus. The Graver Company, Dressler Goldsmith Shore Sutker & Milnamow, May 19, 1992: US05114596 (22 worldwide citation)

A method and apparatus for cleaning filter elements that are vertically positioned within a filter vessel that has a tube sheet dividing the filter vessel into a lower filter compartment and an upper plenum compartment. A fixed volume of backwash liquid is rapidly directed from the plenum compartmen ...


5
Laterra Terrance: Backwash method and apparatus.. Graver Co, April 22, 1992: EP0481391-A2 (6 worldwide citation)

A method and apparatus for cleaning filter elements (68) that are vertically positioned within a filter vessel (52) that has a tube sheet (66) dividing the filter vessel (52) into a lower filter compartment (62) and an upper plenum compartment (64). A fixed volume of backwash liquid is rapidly direc ...


6
Greg Ellard, Gary Mann: Method for backwashing granular media filters and bioreactors. Tetra Process Technologies, Jo Katherine D&apos Ambrosio, October 8, 2002: US06461525 (2 worldwide citation)

A method for removal of solids in a water treatment system having multiple filters, each filter comprising an air backwash system and a water backwash system, comprising a series of steps to enable two filters to be in some stage of the backwash process at the same time thereby reducing the time the ...


7
Choi Jin Nak: 다공성 여재를 이용한 고속 여과처리장치와 이의 역세척 방법 (KO), High speed filtration device using porous media, and backwash method thereof (EN). MIRACLEWATER, Kim Yoon Bae, May 5, 2011: WO/2011/052938 (1 worldwide citation)

The present invention relates to a porous media-mediated high speed filtration device for easy backwash, wherein the inflow water to be filtered is guided to an upper portion of the high speed filtration device and is filtered by downflow and porous media are backwashed for maintaining optimum filte ...


8
Chad L Felch, Michael Howdeshell, Stuart J Munson, Eric A Lorge, Bryan J Kumfer, Matthew Patterson: Water treatment apparatus incorporating walnut shell filter media and a draft tube system. SIEMENS ENERGY, February 28, 2017: US09580335

The present invention relates generally to a system and method for treating wastewater in a filter media apparatus having a draft tube system. The filter media may be walnut shell media.


9
Jin Nak Choi: High speed filtration device using porous media, and backwash method thereof. Sung Pil Choi, Blakely Sokoloff Taylor & Zafman, October 6, 2015: US09149746

The present invention relates to a porous media-mediated high speed filtration device for easy backwash, wherein the inflow water to be filtered is guided to an upper portion of the high speed filtration device and is filtered by downflow and porous media are backwashed for maintaining optimum filte ...


10
Sheldon Cote: PC pump inlet backwash method and apparatus. Christensen O Connor Johnson Kindness PLLC, June 21, 2005: US06907925

A downhole moineau pump assembly includes a stator with a rotor extending through the stator. The rotor and stator sealingly engage each other at spaced intervals to form a series of annular spaces. A primary inlet is provided for fluids to enter a first of the series of annular spaces. A surface mo ...



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