Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 7513372 | Wave coil filter assembly A filter assembly including a continuous resilient cylindrical helical filter coil having flat top and bottom surfaces with each coil including a regular sinusoidal shape having multiple peaks and troughs with the flat top and bottom surfaces of adjacent coils in co... | 04/07/2009 |
| 7371322 | Filtration system and dynamic fluid separation method A filtration system is provided with filter media operable to remove solids, particulate and colloidal matter from a process fluid. The filtration system may include one or more porous membranes which are anchored or secured on their periphery with a large open work... | 05/13/2008 |
| 7335312 | Centrifuge with combinations of multiple features A centrifuge with combinations of multiple features is disclosed. In one aspect, a centrifuge for removing more dense material from a fluid medium includes a fluid separation wall placed within a sleeve. The fluid separation wall rotates around the axis of rotation.... | 02/26/2008 |
| 7320750 | Centrifuge with controlled discharge of dense material A centrifuge with controlled discharge of dense materials disclosed. A centrifuge includes a fluid separation wall placed within a sleeve to form a containment zone therebetween. The fluid separation wall aligns and rotates parallel to an axis of rotation. A recepta... | 01/22/2008 |
| 7294274 | Filtration system with enhanced cleaning and dynamic fluid separation A filtration system is provided with filter media operable to remove solids, particulate and colloidal matter from a process fluid. Acoustic, vibration and sonic energy may be used to clean associated filter media to allow substantially continuous filtration of proc... | 11/13/2007 |
| 7282155 | Device and a method for filtering a fluid A device for filtering a fluid includes a fiber housing having an inlet end with at least one inlet and an outlet end with at least one outlet. The fiber housing surrounds and defines an outer bound for a plurality of fibers extending longitudinally in the fiber hou... | 10/16/2007 |
| 7282147 | Cleaning hollow core membrane fibers using vibration A filtration system is provided with hollow membrane filter elements operable to remove solids, particulate and colloidal matter from a process fluid. Acoustic, vibration and ultrasonic energy may be used to clean exterior portions of the hollow membrane filter elem... | 10/16/2007 |
| 7244366 | Water filtration and recycling for stone fabrication equipment for exterior and architectural stone A filtered grey water recycling system includes a waste water storage tank for receiving waste water from a stone processing system and a filtered grey water supply loop providing filtered grey water to the stone processing system. The filtered grey water loop inclu... | 07/17/2007 |
| 7241383 | Fluid treating method and apparatus A fluid treatment method includes the steps of forming a ring lamination by laminating a plurality of filtering rings with contact surfaces facing each other in a laminating direction; providing at least portions of the filtering rings with a contact surface roughne... | 07/10/2007 |
| 7192528 | Self-cleaning filter apparatus A self-cleaning filter system is disclosed that includes an inlet fitting that is adapted to be inserted into an existing filter body. A spray tube having a plurality of outlets that slideably engages the inlet fitting, is positioned in the ring discs of the existin... | 03/20/2007 |
| 7188731 | Variable flexure-based fluid filter An apparatus and method for filtering particles from a fluid comprises a fluid inlet, a fluid outlet, a variable size passage between the fluid inlet and the fluid outlet, and means for adjusting the size of the variable size passage for filtering the particles from... | 03/13/2007 |
| 7093720 | Filter device for garden ponds or similar A filter device for filtering flowing liquids comprises a compressible filter medium in a vessel and a device by which the filter medium can be compressed by means of an actuation handle, so that impurities can be pressed out of the filter medium. In addition, the f... | 08/22/2006 |
| 7073520 | Washing machine with clog proof lint filter The filter (3) comprises transversal walls (11) forming a labyrinth-like path with the inner surface of a hollow body (6) that is part of the water outlet circuit of the machine. On the peripheral edge of the said transversal walls (11) t... | 07/11/2006 |
| 6971525 | Centrifuge with combinations of multiple features A centrifuge with combinations of multiple features is disclosed. In one aspect, a centrifuge for removing more dense material from a fluid medium includes a fluid separation wall placed within a sleeve. The fluid separation wall rotates around the axis of rotation.... | 12/06/2005 |
| 6942796 | Filter device for filtering a liquid A filter unit is disclosed suitable for use in a filter housing. The filter unit comprises superposed and spaced-apart inclined lamellar structures, preferably in the form of hollow truncated cones, each having a lower end side opposite an upper end side and a passa... | 09/13/2005 |
| 6932913 | Method for vibration in a centrifuge A system and method for vibration in a centrifuge is disclosed. A centrifuge for removing more dense material from a fluid medium includes a fluid separation wall placed within a non-rotating sleeve. The fluid separation wall rotates around the axis of rotation and ... | 08/23/2005 |
| 6896818 | Water filtration and recycling for stone fabrication equipment A water treatment and recycling system to provide grey water and crystal clear water to a stone processing system including crystal clear water stone fabrication equipment requiring crystal clear water and grey water stone fabrication equipment capable of using grey... | 05/24/2005 |
| 6605216 | Deep media filter A compact, rapid upflow deep media filter for removing suspended solids from a liquid flow, which includes: a filter casing having a liquid inlet port, a liquid outlet port, and a filter bed composed of a volume of granular filter media and located betwee... | 08/12/2003 |
| 6139757 | Method of separating cells from blood using a filter having a changeable porosity A method of separating cells from blood by using a filter apparatus having first and second ports and a filter member therebetween having a changeable porosity. The filter member includes a stack of porous polymer sheets that preferably has a gradient of ... | 10/31/2000 |
| 6135293 | Water/sludge filter press A water/sludge filter press used with a filter bag for filtering water and collecting sludge in the bag. When the filter press is actuated, the filter bag is compressed therein for dewatering the sludge in the bag for ease in removing the sludge and reusi... | 10/24/2000 |
| 6117321 | External tension adjustment device for a filtering sleeve in a filtering machine An adjustable elastic support is provided for a filtering sleeve. A tilting body 1 has one extremity with an inlet 2. A filter unit 3 is lodged inside the body 1. The lower portion of the body 1 is provided with an outlet 5 for the filtrate. An outlet 6 f... | 09/12/2000 |
| 6090275 | Liquid filter with density adjustable filter element means A liquid filter includes a barrel defining a cylindrical water chamber having a neck at the middle, a raw water inlet at the bottom side, and a clean water outlet at the top side, a suspension board suspended in the water chamber, a pneumatic cylinder ope... | 07/18/2000 |
| 6036859 | Filter press apparatus Filter press apparatus comprises a plurality of substantially parallel filter plates assembled as a unit and located within a substantially rigid outer shell to provide a closed vessel to which can be supplied medium under pressure to be filtered via the ... | 03/14/2000 |
| 5984108 | Fluid filtering system with variable filter layer A permanent fluid filtering system includes a cylindrical body having an upper end, to which an inlet tube is connected, and a lower end, to which an outlet tube is connected, and a latitude thread filter assembly disposed within the cylindrical body. The... | 11/16/1999 |
| 5851391 | Sludge dewatering treatment apparatus The sludge dewatering treatment apparatus of the present invention is provided with a cylinder that has a large number of pipe members arranged in the axial direction and secured around its inner surface, that is divided axially into two halves so as to a... | 12/22/1998 |
| 5709794 | Low-cost portable water filter A low-cost portable water treatment device having a low-cost replaceable filter. The device includes a housing having an inlet, an outlet and a water filtration chamber. The replaceable filter is disposed in the water filtration chamber and comprises a di... | 01/20/1998 |
| 5566605 | Centrifugal type extraction cell having a deformable sealing joint for a hot beverage preparation machine An extraction cell of the centrifugal type for a hot beverage preparation machine, including a grounds collection drum on which is mounted, in a sealed manner by a sealing structure, a cover provided with a liquid delivery orifice, and a filtration struct... | 10/22/1996 |
| 5547573 | Device for removing cake or residual layer in a centrifuge The device comprises a first wide-mesh cloth or screen which bears against the calender of a basket, at least one tight supple tube connected to a source of gas under pressure which is against the first cloth or screen, a second cloth or screen identical ... | 08/20/1996 |
| 5486289 | System for mechanically stabilizing a bed of particulate media A system for mechanically stabilizing a bed of particulate media which undergoes changes in volume during operation. A tubular column is provided which is closed and ported at a first end and open at a second end. A piston assembly is supported in the col... | 01/23/1996 |
| 5482623 | Filter press apparatus A plurality of substantially parallel filter plates are assembled as a unit and are locatable within a substantially rigid outer shell to provide a closed vessel. Either or both of the unit and the shell are movable relative to the other between a positio... | 01/09/1996 |
| 5439593 | Solid phase extraction apparatus Apparatus for retaining a sorbent bed without permitting voids to be created and that can be readily handled by automated systems is disclosed. A solid phase extraction apparatus is disclosed that is most preferably comprised of a body that contains a sor... | 08/08/1995 |
| 5248415 | High speed upward flow filtration apparatus In a high speed upward flow filtration apparatus, an upper perforated panel for receiving a fibrous lump is secured to a circumferential side plate for receiving the fibrous lump. A lower movable perforated panel for receiving the fibrous lump is vertical... | 09/28/1993 |
| 5089128 | Apparatus for separation of ferromagnetic materials from fluid media An apparatus for separation of ferromagnetic materials has a working chamber occupied by a ferromagnetic attachment in the form of plates with openings edged by shaped projections, a magnetizing system and means for consolidation of the plates made in the... | 02/18/1992 |
| 4995972 | Method and apparatus for removing liquid from permeable material Disclosed herein are a method and apparatus for removing liquid from a permeable material, such as slurries, sludges, porous solids and permeable foams. The method and apparatus involve constraining the material to be deliquified such that the material in... | 02/26/1991 |
| 4937005 | Filter assembly The filter assembly includes a filter unit disposed in a vertical tank and includes a first end plate or drain head having an opening in fluid communication with a filtrate port in the tank, a longitudinally movable second end plate or compression head sp... | 06/26/1990 |
| 4923612 | Fluid recovery and transfer system A fluid recovery and transfer system utilizes hydraulic pressure on a plurality of collapsible containers to effect the alternate intake and output of a fluid from the collapsible containers. The hydraulic pressure is generated through the pumping of a pl... | 05/08/1990 |
| 4919801 | Control system for pump cycling A filter unit using a bump-type filter is disclosed. Briefly stated, a chamber has a fluid inlet conduit so that contaminated fluid, upon entering the chamber, is directed upwardly towards filter tubes and downwardly towards the bottom of the chamber. The... | 04/24/1990 |
| 4871463 | Vertical reaction vessel A method and apparatus for uniformly distributing fluid across the entire cross section of a reaction medium and for compensating for volumetric changes in the reaction medium utilized a resilient membrane which cooperates with an adjacent fluid manifold ... | 10/03/1989 |
| 4795562 | Membrane batch-processing apparatus A membrane batch-processor system and method for the fluid treatment of a plurality of specimen containing membranes, such as membranes having specimens of DNA, RNA, and protein molecules deposited thereon, includes a receptacle having an interior cavity ... | 01/03/1989 |
| 4793932 | Variable volume filter or concentrator A concentrator for concentrating the fine solids of a liquid feed suspension has a shell within which there is a bundle of microporous fibers. Pressurized feed suspension is introduced through an inlet and passes over the external walls of the fibers with... | 12/27/1988 |
