Method and apparatus for the clean replacement of contaminated HEPA filters

Wiedmeyer, Stanley G.; Frigo, Arthur A.; Preuss, Daniel; Bielick, Edward F.; Malecha, Richard F.

Title: Method and apparatus for the clean replacement of contaminated HEPA filters

Abstract

A method and apparatus are provided for the replacement of contaminated HEPA filters without contamination of the surrounding environment. A filter housing is generally cylindrical and defines a filter receiving cavity. The filter housing having a filter receiving end and a filter removing end. An active HEPA filter is received within the filter housing cavity and is located near the filter removing end. A backup HEPA filter is received within the filter housing cavity and is located near the filter receiving end. A change-out bag is received within the filter housing cavity and is located adjacent to the filter removing end. The filter housing includes a gas flow path through the active HEPA filter without passing through the backup HEPA filter. For the replacement of contaminated HEPA filter, end covers are removed from the filter receiving end and the filter removing end of the filter housing and the change-out bag is opened. The backup HEPA filter is pushed into position of the active HEPA filter, thereby moving the active contaminated HEPA filter into the change-out bag during filter replacement. The change-out bag is sealed to isolate the HEPA filter for disposal.

Inventors:: Wiedmeyer, Stanley G.; Frigo, Arthur A.; Preuss, Daniel; Bielick, Edward F.; Malecha, Richard F.

Issue Date:: 2002-04-02

Research Org.:: Univ. of Chicago, IL (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1531440

Patent Number(s):: 6364923

Application Number:: 09/616,419

Assignee:: The University of Chicago (Chicago, IL)

Patent Classifications (CPCs):: Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION

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Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S55/46 - Spray booths

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B01D46/008 - {Replacing filter elements}
B01D46/2411 - {Filter cartridges}
B01D46/0091 - {Including arrangements for environmental or personal protection}
B01D46/0098 - {Protecting coverages on the filter which is removed before the filter is used, protection of filter, packaging}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10S - TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S55/18 - Work bench

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DOE Contract Number:: W-31-109-ENG-38

Resource Type:: Patent

Resource Relation:: Patent File Date: 2000-07-14

Country of Publication:: United States

Language:: English

Subject:: 61 RADIATION PROTECTION AND DOSIMETRY

Citation Formats


                    Wiedmeyer, Stanley G., Frigo, Arthur A., Preuss, Daniel, Bielick, Edward F., and Malecha, Richard F. Method and apparatus for the clean replacement of contaminated HEPA filters.  United States: N. p., 2002. 
        Web.

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                    Wiedmeyer, Stanley G., Frigo, Arthur A., Preuss, Daniel, Bielick, Edward F., & Malecha, Richard F. Method and apparatus for the clean replacement of contaminated HEPA filters.  United States.

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                    Wiedmeyer, Stanley G., Frigo, Arthur A., Preuss, Daniel, Bielick, Edward F., and Malecha, Richard F. Tue .  
        "Method and apparatus for the clean replacement of contaminated HEPA filters".  United States.  https://www.osti.gov/servlets/purl/1531440.

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@article{osti_1531440,

  title        = {Method and apparatus for the clean replacement of contaminated HEPA filters},

  author       = {Wiedmeyer, Stanley G. and Frigo, Arthur A. and Preuss, Daniel and Bielick, Edward F. and Malecha, Richard F.},

  abstractNote = {A method and apparatus are provided for the replacement of contaminated HEPA filters without contamination of the surrounding environment. A filter housing is generally cylindrical and defines a filter receiving cavity. The filter housing having a filter receiving end and a filter removing end. An active HEPA filter is received within the filter housing cavity and is located near the filter removing end. A backup HEPA filter is received within the filter housing cavity and is located near the filter receiving end. A change-out bag is received within the filter housing cavity and is located adjacent to the filter removing end. The filter housing includes a gas flow path through the active HEPA filter without passing through the backup HEPA filter. For the replacement of contaminated HEPA filter, end covers are removed from the filter receiving end and the filter removing end of the filter housing and the change-out bag is opened. The backup HEPA filter is pushed into position of the active HEPA filter, thereby moving the active contaminated HEPA filter into the change-out bag during filter replacement. The change-out bag is sealed to isolate the HEPA filter for disposal.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2002},

  month        = {4}

}

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Title: Method and apparatus for the clean replacement of contaminated HEPA filters

Abstract

Citation Formats

Method and apparatus relating to disposable filter modules for filtering air containing hazardous substances patent, November 2000

Clean air facility patent, February 1989

U-loop air handling apparatus patent, May 1988

Gas-Circulating Means patent, January 1968

Protective System for Contaminated Atmosphere patent, October 1973

Room air decontamination device patent, November 1998

Door for Germfree Enclosures patent, May 1962

Make-up air handler and method for supplying boron-free outside air to clean rooms patent, August 2000

Cartridge locking device and method patent, December 2005

Resource loading system and method for use in atmosphere-containment scenarios patent, September 2017

Biosafety cabinet filter removal devices, systems, and methods patent, October 2013

Filter system patent, September 2008

Bag in, bag out filter assembly patent, July 2009

Filter apparatus and frequency converter to which the filter apparatus is connected patent, January 2010

Method and apparatus for an air filter cartridge replacement assembly patent, May 2014

Sterilized filter and a method for manufacturing the same patent, January 2005

Filter device patent, November 2010

Emissions control filter assembly and system patent, October 2012

Enhanced aerosol test for assessing filter integrity patent, November 2018

Enhanced aerosol test for assessing filter integrity patent, December 2018

Method and apparatus relating to disposable filter modules for filtering air containing hazardous substances
patent, November 2000

Clean air facility
patent, February 1989

U-loop air handling apparatus
patent, May 1988

Gas-Circulating Means
patent, January 1968

Protective System for Contaminated Atmosphere
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Room air decontamination device
patent, November 1998

Door for Germfree Enclosures
patent, May 1962

Make-up air handler and method for supplying boron-free outside air to clean rooms
patent, August 2000

Cartridge locking device and method
patent, December 2005

Resource loading system and method for use in atmosphere-containment scenarios
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Biosafety cabinet filter removal devices, systems, and methods
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Filter system
patent, September 2008

Bag in, bag out filter assembly
patent, July 2009

Filter apparatus and frequency converter to which the filter apparatus is connected
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patent, May 2014

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