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| Number | Title | Issue Date |
| 7235140 | Method for cleaning tissue processing molds The present invention is directed to a cleaning system and methods for cleaning tissue embedding molds. The cleaning system includes a cleaning vessel that holds a cleaning solution. The tissue processing molds are supported by a basket receptacle which is placed in... | 06/26/2007 |
| 7097046 | Automatically cleaning filter assembly for a liquid-carrying loop A filter assembly for an aquarium has a self-cleaning filter. A fine mesh filter screen is disposed between an inlet and an outlet for filtering solid matter from the water that is pumped from the aquarium, through the filter, and back to the aquarium. When the filt... | 08/29/2006 |
| 6998046 | Filter system and methods of operating the same A filter system employing a modular filter and at least one high rate pre-treatment system for expeditiously and effectively filtering water. The modular filter includes a reservoir housing for containing fluid. A plurality of filter cells are disposed in the reserv... | 02/14/2006 |
| 6942795 | Modular filter system and method of repairing and/or replacing components thereof A modular filter system and a method of repairing and/or replacing one or more components thereof. The modular filter system includes a traveling backwash hood assembly and a plurality of filter cells having media contained therein. The traveling backwash hood assem... | 09/13/2005 |
| 6923911 | Method of filtering air through an air passageway The filter system for filtering particulate material from a generally unidirectional fluid stream comprising a first filter removably positioned in the fluid stream and a second filter removably positioned in the fluid stream downstream of the first filter. The firs... | 08/02/2005 |
| 6423224 | Filter cartridge assembly for water treatment device A filter cartridge end-of-life mechanism and a filter cartridge assembly for a water treatment device. The end-of-life mechanism comprises a float which is moved along an escapement path each time the device is filled. A counting mechanism connected to th... | 07/23/2002 |
| 6280619 | Inline filter having swivel fitting An inline filter having a swivel right-angle fitting for coupling an inlet or outlet tube. The fitting includes a stem having a pair of O-rings and a distal ridge and notch. The cap of the filter includes a port having a plurality of annular, resilient ta... | 08/28/2001 |
| 5891335 | Filtration system with traveling plenum A completely new type of filtration system uses a traveling plenum that travels through granular filtration media in a filter tank and backwashes a portion of the media a little at a time. A pump forces backwash water into the traveling plenum, and porous... | 04/06/1999 |
| 5759395 | Column arrangement A structure for the absorption or desorption of a substance on a bed through which liquid is allowed to pass comprises a vessel containing a liquid-permeable bed, a lower adaptor, an upper adaptor and means for providing a liquid flow to the bed through o... | 06/02/1998 |
| 5554281 | Traveling bridge filter system and associated underdrain A travelling bridge filtration unit includes a tank having a bottom wall, a pair of side walls and a pair of end walls arranged to provide a rectangular tank with an open top. An interior partition in the tank extends lengthwise between the pair of end wa... | 09/10/1996 |
| 5552045 | Sliding shoe unit for automatic backwash filters Articulated sliding shoes for improving the operation of automatic backwashing filter systems basically include (a) a rectangular support frame, (b) a central valve member, (c) a fore waste valve member, (d) an aft waste valve member and (e) sets of sprin... | 09/03/1996 |
| 5401405 | Combined air/water backwash in a travelling bridge filter In a travelling bridge filtration system including a tank divided into a plurality of adjacent filter cells, each of the cells containing filter media, a travelling bridge carriage located above the tank and movable along the tank, the carriage supporting... | 03/28/1995 |
| 4988439 | Two stage traveling bridge filter A liquid filtration system is provided which includes a traveling bridge carriage mounting air scour and backwash means within a single hood structure for successively cleaning each of a plurality of roughing filter cells and polishing filter cells formed... | 01/29/1991 |
| 4908136 | Method and apparatus for forming and ion-exchanging a filter cake Disclosed is an improved method and apparatus for creating a more uniform filter cake on a vacuum filter belt. A weir box for depositing a slurry on the filter belt has an outlet in the form of a plurality of slots spaced transversely of the filter belt w... | 03/13/1990 |
| 4859330 | Traveling bridge filter with air scour A liquid filtration system is provided which includes a traveling bridge device mounting air scour and backwash means for successively cleaning each of a plurality of filter cells formed in a filtration tank. The air scour means includes a first hood open... | 08/22/1989 |
| 4855113 | Apparatus for removing sulfur from organic polysulfides Sulfur-laden liquid organic phase dimethyl polysulfide (DMPS) is caused to rise from a sour gas well by reaction of the gaseous sulfur component within the well with a sulfur solvent, typically dimethyl disulfide (DMDS). The DMPS is contacted by an extrac... | 08/08/1989 |
| 4655908 | Device for cleaning liquids in sand filters The present invention relates to a device for cleaning of liquids in sand filters of the up-stream type. The device according to the invention is characterized in that a sand filter bed (5) is arranged in the form of at least one ring-shaped element, whic... | 04/07/1987 |
| 4600510 | Liquid treatment apparatus In a water treatment apparatus, the jets in the distributor arms of a percolating filter are kept clear from jamming by automatic actuation of plungers which enter the jets to dislodge any obstructions therein, each plunger being individually mounted on t... | 07/15/1986 |
| 4152265 | Filter apparatus A filter apparatus in which a generally horizontal bed of filter material is supported on a porous support and is divided by spaced partitions into individual filter cells above the support and individual filter compartments below the support, and a carri... | 05/01/1979 |
| 4119273 | System for pollution suppression A rotary distributor arm comprising improved distribution nozzles and flow control accomplished by a gradual taper of the arm itself is defined which ensures a uniform flow distribution across the full radius of the distributing medium so that uniformity ... | 10/10/1978 |
| 3984326 | Gravity filtering equipment A gravity filtering equipment comprising a basin partitioned into a plurality of compartments each having a permeable bottom covered by a filtering bed and a device for flushing such filtering beds. This device comprises a bell adaptable fluid-tightly ont... | 10/05/1976 |
