Patents by Inventor Cheah Wei Ng

Cheah Wei Ng has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11878266
    Abstract: A heat resistant regenerable air filter assembly for an air supplying application an air permeable adsorbent panel (1) mounted in a frame (2), said panel comprising a heat resistant structure comprising a heat resistant porous adsorbent material for adsorbing molecular contamination and being configured to be regenerated by desorption, and said air filter assembly comprising a heat resistant sealing material (3) between the adsorbent panel and the frame, where the heat resistant sealing material is a carbon fiber felt material arranged between the air permeable adsorbent panel and the frame so as to fill the distance therebetween, thereby preventing leakage of unfiltered air through the heat regenerable air filter assembly; and a method (100) of regenerating the air filter assembly.
    Type: Grant
    Filed: February 23, 2022
    Date of Patent: January 23, 2024
    Assignee: Camfil AB
    Inventors: Boon Han Lim, Cheah Wei Ng
  • Publication number: 20220274047
    Abstract: A heat resistant regenerable air filter assembly for an air supplying application an air permeable adsorbent panel (1) mounted in a frame (2), said panel comprising a heat resistant structure comprising a heat resistant porous adsorbent material for adsorbing molecular contamination and being configured to be regenerated by desorption, and said air filter assembly comprising a heat resistant sealing material (3) between the adsorbent panel and the frame, where the heat resistant sealing material is a carbon fiber felt material arranged between the air permeable adsorbent panel and the frame so as to fill the distance therebetween, thereby preventing leakage of unfiltered air through the heat regenerable air filter assembly; and a method (100) of regenerating the air filter assembly.
    Type: Application
    Filed: February 23, 2022
    Publication date: September 1, 2022
    Inventors: Boon Han LIM, Cheah Wei NG
  • Publication number: 20220241712
    Abstract: An air filter assembly and use thereof for filtration of air in wet or damp conditions, said air filter assembly comprising: an air filter comprising a front frame defining at least one rectangular aperture for receiving an air flow to be filtered; characterized in that said air filter assembly comprises a deflector element extending alongside edge portion of the rectangular aperture and adapted an to deflect an air flow passing through the rectangular aperture away from an adjacent inside surface of the air filter; and a liquid drain arranged such that liquid collected at said adjacent inside surface of the air filter can exit the air filter through said liquid drain.
    Type: Application
    Filed: July 2, 2020
    Publication date: August 4, 2022
    Inventors: Daniel IGGANDER, Kenny HEDLUND, Cheah Wei NG, Muthu Krisnan MAGESHVARAN
  • Patent number: 8409337
    Abstract: A deep bed scrubber filter section comprises includes an unfiltered air input end, a filtered air output end, an airflow filtration path extending from the unfiltered air input end to the filtered air output end, a plurality of media beds along the airflow filtration path in series arrangement with one another, the media beds each having a media bed volume and each being defined by a plurality of sidewalls, two of the sidewalls of each of the media beds being perforated sidewalls at least partially intersecting the airflow filtration path, wherein an adjustable sidewall of at least one of the perforated sidewalls of a first media bed of the media beds is independently removable from the airflow filtration path and is independently adjustable to a plurality of positions along the airflow filtration path, wherein adjustment of the at least one adjustable sidewall of the first media bed alters the media bed volume of the first media bed.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: April 2, 2013
    Assignee: AAF-McQuay Inc.
    Inventors: Michael W. Osborne, M. Aflal Rahmathullah, Cheah Wei Ng
  • Patent number: 8404023
    Abstract: A method of transferring filter media between a media bed of a dry scrubber and a filter media container, comprising placing the media bed in flow communication with the filter media container, obstructing a majority of an airflow path of the media bed, the airflow path extending from an unfiltered air input opening of the dry scrubber, through the media bed of the dry bed scrubber, to a filtered air output opening of said dry bed scrubber, powering a blower in the airflow path of the media bed when the airflow path is obstructed and the media bed is in flow communication with the filter media container, whereby the filter media is transferred between the media bed and the filter media container.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: March 26, 2013
    Assignee: AAF-McQuay Inc.
    Inventors: Michael W. Osborne, M. Aflal Rahmathullah, Cheah Wei Ng
  • Publication number: 20120264220
    Abstract: An apparatus and method for monitoring and determining corrosion rates in an airflow wherein the corrosion rate is dynamically corrected for non-corrosive environmental effects.
    Type: Application
    Filed: April 14, 2011
    Publication date: October 18, 2012
    Inventors: M. Aflal Rahmathullah, Michael W. Osborne, Cheah Wei Ng
  • Patent number: 8277732
    Abstract: A air gas detection pack is provided. The air gas detection pack has a card receiving pocket which slidably receives a gas detection card, the gas detection card having a plurality of chemically reactive materials retained therein and exposed to outside air through a plurality of aligned air permeable apertures formed in the front and rear wall of the substance detection pack. The combined gas detection card and gas detection pack indicates the concentrations of gases in the air. The air permeable apertures in conjunction with the reactive materials of the substance detection card are covered with a filtering media to protect the reactive material from dirt and dust contamination.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: October 2, 2012
    Assignee: AAF-McQuay Inc.
    Inventors: Michael W. Osborne, M. Aflal Rahmathullah, Cheah Wei Ng