Pleated Patents (Class 210/493.1)
  • Patent number: 6340089
    Abstract: A screening screen assembly for a vibratory screening machine including an apertured plate, and a subassembly of an undulating support screen and fine screening screen and finer screening screen bonded to each other by a fused plastic grid and bonded to the apertured plate. A method of fabricating a screening screen assembly for a vibratory screening machine including the steps of providing a support screen, superimposing a plastic grid onto the support screen, superimposing a finer screening screen onto the fine screening screen, applying heat and pressure to the superimposed screens to fuse the plastic grid and thereby form a flat bonded laminate subassembly by causing the fused plastic grid to permeate the fine screen and the finer screen and the support screen, forming the bonded laminate subassembly into an undulating shape, providing an apertured plate, and bonding the undulating bonded subassembly to the apertured plate.
    Type: Grant
    Filed: February 2, 2000
    Date of Patent: January 22, 2002
    Assignee: Derrick Manufacturing Corporation
    Inventor: John J. Bakula
  • Patent number: 6338798
    Abstract: A method of forming a filter package includes disposing a filter and a liquid in a container with the filter immersed in the liquid and sanitizing the liquid and the filter while in the container. After sanitizing, the container may be hermetically sealed to enclose the sanitized liquid and filter. The container may be vented during sanitizing to allow vapor of the liquid to exit from the container and prevent pressure from building up in the container. The container may be either rigid or flexible.
    Type: Grant
    Filed: December 15, 2000
    Date of Patent: January 15, 2002
    Assignee: Pall Corporation
    Inventors: Scott D. Hopkins, Daniel W. Spencer, Joseph A. Peri
  • Patent number: 6315130
    Abstract: A filter element according to the present disclosure includes a plurality of longitudinally extending pleats including outwardly radiating primary pleats and inwardly radiating secondary pleats, with at least one secondary pleat positioned between two adjacent primary pleats. Each primary pleat has a predetermined radial height, and each secondary pleat has a radial height that is less than the radial height of each primary pleat and different from the radial height of at least one other secondary pleat. A filter element according to the present disclosure provides greater filter area, an increased overall filter density, and access to more radial flow paths at the outer diameter of the filter element.
    Type: Grant
    Filed: January 7, 2000
    Date of Patent: November 13, 2001
    Assignee: Cuno Incorporated
    Inventor: Daniel K. Olsen
  • Publication number: 20010025816
    Abstract: There can be obtained an ecological filtration apparatus providing a sufficient function of precise filtration while contributing to saving resources and minimizing refuse. The filtration apparatus includes a housing having an inlet and an outlet, an outer cylinder fixed to the housing, and a cartridge filter formed mainly of a cylindrical filter, an inner cylinder and end caps. The cartridge filter is detachably attached to the housing, housed in the outer cylinder, blocking a channel extending from the inlet to the outlet.
    Type: Application
    Filed: March 22, 2001
    Publication date: October 4, 2001
    Inventor: Masao Ochi
  • Patent number: 6290068
    Abstract: A screen assembly for a vibratory separator has been invented, which, in certain aspects, has at least two ridge-valley series of screening material with a plurality of alternating ridges and valleys of screening material, and at least one ridge-valley series of screening material offset from at least one other ridge-valley series of screening material. A screen assembly for a vibratory separator has been invented, which, in certain aspects, has at least one ridge-valley series of screening material, said ridge-valley series including a plurality of ridges each ridge between valleys of a plurality of valleys, and each ridge having a first end spaced apart from a second end, said first end having a top wider than a top of second end.
    Type: Grant
    Filed: April 22, 1999
    Date of Patent: September 18, 2001
    Assignee: Tuboscope I/P, Inc.
    Inventors: Thomas C. Adams, Kenneth W. Seyffert, David W. Largent, David L. Schulte, Guy L. McClung, III, Jeffrey E. Walker, Hector M. Murray, James F. Maroney, III, Joseph C. Winkler
  • Patent number: 6283308
    Abstract: A bacteriostatic filter cartridge having a porous core member about which is layered a yarn and/or a polyester membrane and/or melt blown web of polypropylene and/or a trilaminate polypropylene membrane, any or all of which may be impregnated with an antimicrobial agent. The filter cartridge is sized so as to fit tightly into a cartridge housing of a fluid filtration system. Fluid passing through the cartridge housing will be filtered by the filter cartridge to remove contaminants from the water and which prevents the growth of bacterial and other microorganisms on the filter media.
    Type: Grant
    Filed: October 28, 1998
    Date of Patent: September 4, 2001
    Assignee: Microban Products Company
    Inventors: Arvind S. Patil, Gilbert Patrick
  • Patent number: 6260709
    Abstract: A filter media for physically separating particles of an abrasive media having a given mean average particle size from a chemical-mechanical polishing (CMP) slurry. The abrasive media has a particle size distribution including particles larger than the mean average particle size. The filter media is provided as being formed of at least one sheet of a porous membrane having a first and second surface defining a thickness dimension of the membrane therebetween, and having a plurality of generally cylindrical capillary pores formed through the thickness dimension sized effective to capture the particles larger than the mean average particle size. In service, the slurry is supplied to the first side of the filter media, and is passed through the media to the second side thereof such that at least a portion of the particles of the abrasive media larger than the mean average particle size is retained on the first side of the filter media.
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: July 17, 2001
    Assignee: Parker-Hannifin Corporation
    Inventors: Derek A. Leman, Alfred K. Fritzsche
  • Patent number: 6247480
    Abstract: A containment assembly for use with a pressure washing apparatus to contain and collect the relatively light weight contaminants from run-off of a washing fluid after being flowed over an object to be cleaned. The containment assembly includes a settling compartment for collection of the run-off washing fluid therein, and a containment compartment in gravity flow fluid communication with a surface of the collected washing fluid in the settling compartment. As the lightweight contaminants at the surface of the washing fluids gravity flow into the containment compartment, they are contained and collected therein. A fluid extraction assembly is in fluid communication with the contained washing fluid in the containment compartment through an opening therein vertically disposed below a predetermined operational fluid level of the contained washing fluid.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: June 19, 2001
    Assignee: EZ Environmental Solutions Corporation
    Inventor: Paul Wegner
  • Patent number: 6224767
    Abstract: A fluid separation element assembly comprises a fluid separation element having a membrane unit and a wrapping material formed around the membrane unit, an anti-telescoping plate attached to at least one end of the fluid separation element at a condition free to be detached, and a feed water seal member for preventing feed water from leaking through a gap between the fluid separation element and the anti-telescoping plate. The membrane unit is formed by a separation membrane, a permeate carrier material and a feed carrier material which are spirally wound around a permeate collection tube. By providing the anti-telescoping plate detachably, when the separation membrane has reached its life, it is possible to reuse other members.
    Type: Grant
    Filed: March 9, 1999
    Date of Patent: May 1, 2001
    Assignee: Toray Industries Inc.
    Inventors: Koji Fujiwara, Hiroyuki Ikada, Hisaaki Fujino
  • Patent number: 6206205
    Abstract: A filter support includes a tubular construction that has flow apertures, a top edge, an opposite bottom edge, and first and second side edges extending between the top and bottom edges. The first and second side edges oppose each other to form a seam region having a non-axial seam center line extending between the top edge and the bottom edge.
    Type: Grant
    Filed: October 29, 1998
    Date of Patent: March 27, 2001
    Assignee: Donaldson Company, Inc.
    Inventors: Reynold F. Durre, Laurie A. Buchberger, Greg Brace
  • Patent number: 6190557
    Abstract: A spiral wound type membrane element is formed by winding independent or continuous envelope-like membranes around the peripheral surface of a water collection pipe and interposing raw water spacers between the envelope-like membranes. When running, raw water is supplied from at least the periphery side of the spiral wound type membrane element and permeate is taken out from an opening end of the water collection pipe. In back wash reverse filtration, permeate is introduced from the opening end of the water collection pipe and permeate guided out from the peripheral surface of the water collection pipe is discharged from at least the periphery side of the spiral wound type membrane element.
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: February 20, 2001
    Assignee: Nitto Denko Corporation
    Inventors: Hajimu Hisada, Yuji Nishida
  • Patent number: 6174439
    Abstract: A method of forming a filter package includes disposing a filter and a liquid in a container with the filter immersed in the liquid and sanitizing the liquid and the filter while in the container. After sanitizing, the container may be hermetically sealed to enclose the sanitized liquid and filter. The container may be vented during sanitizing to allow vapor of the liquid to exit from the container and prevent pressure from building up in the container. The container may be either rigid or flexible.
    Type: Grant
    Filed: May 12, 1999
    Date of Patent: January 16, 2001
    Assignee: Pall Corporation
    Inventors: Scott D. Hopkins, Daniel W. Spencer, Joseph A. Peri