Patents by Inventor Shengwen Leng

Shengwen Leng 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: 7785404
    Abstract: An air purifier includes a housing, a high voltage power supply, a first electrode assembly in which a wire-like first electrode is either the only first electrode or, alternatively, is spaced sufficiently far from any other such first electrodes so as to avoid undesirable effects upon each other, and a second electrode assembly in which there are a plurality of blade-like second electrodes. The air purifier can be of the type in which air flows through the housing as a result of electro-kinetic effects. To increase air flow velocity, the voltage between first and second electrodes is relatively high, such as 23-50 kV, and the first and second electrodes are accordingly spaced apart a relatively great distance, such as at least 30 mm.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: August 31, 2010
    Assignee: Sylmark Holdings Limited
    Inventors: Shengwen Leng, Guangsheng Liu
  • Patent number: 7390352
    Abstract: An air purifier with front-loading electrodes includes an electrode loading compartment for storing the plate electrodes. When the air purifier is in a closed configuration, the electrode loading compartment cooperates with the housing to fully enclose the plate electrodes. When the plate electrodes need to be removed, the electrode loading compartment can be moved translationally with respect to the housing to define a gap therebetween. The electrode loading compartment can then be rotated to access and remove the plate electrodes.
    Type: Grant
    Filed: March 17, 2006
    Date of Patent: June 24, 2008
    Assignee: Sylmark Holdings Limited
    Inventors: Shengwen Leng, Guangsheng Liu
  • Publication number: 20080078295
    Abstract: An air purifier includes a housing, a high voltage power supply, a first electrode assembly in which a wire-like first electrode is either the only first electrode or, alternatively, is spaced sufficiently far from any other such first electrodes so as to avoid undesirable effects upon each other, and a second electrode assembly in which there are a plurality of blade-like second electrodes. The air purifier can be of the type in which air flows through the housing as a result of electro-kinetic effects. To increase air flow velocity, the voltage between first and second electrodes is relatively high, such as 23-50 kV, and the first and second electrodes are accordingly spaced apart a relatively great distance, such as at least 30 mm.
    Type: Application
    Filed: October 2, 2006
    Publication date: April 3, 2008
    Inventors: Shengwen Leng, Guangsheng Liu
  • Publication number: 20070214958
    Abstract: An air purifier with front-loading electrodes includes an electrode loading compartment for storing the plate electrodes. When the air purifier is in a closed configuration, the electrode loading compartment cooperates with the housing to fully enclose the plate electrodes. When the plate electrodes need to be removed, the electrode loading compartment can be moved translationally with respect to the housing to define a gap therebetween. The electrode loading compartment can then be rotated to access and remove the plate electrodes.
    Type: Application
    Filed: March 17, 2006
    Publication date: September 20, 2007
    Inventors: Shengwen Leng, Guangsheng Liu
  • Patent number: D551328
    Type: Grant
    Filed: April 18, 2006
    Date of Patent: September 18, 2007
    Assignee: Sylmark Holdings Limited
    Inventors: Shengwen Leng, Guangsheng Liu