Patents by Inventor Wing-Keung Woo

Wing-Keung Woo 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).

  • Battery pack, tool battery and battery operated tool
    Patent number: 11923515
    Abstract: A lithium-polymer based battery pack for power a hand held power tool or a garden tool, the battery pack has a plurality of battery cells located within housing that is selectively connectable to and supportable by a hand held power tool or a garden tool. The battery cells have a lithium-polymer based chemistry and a nominal charged internal impedance of less than or equal to approximately 5 milliohms. In one embodiment the cells are think cells are stacked within the housing such that each sell is layered over or under an adjacent cell and a resiliently deformable substrate located between adjacent battery cells. In another embodiment the cells may be interconnected to have a combined output voltage of at least 9 volts and to produce a combined average discharge current of greater than 20 amps. A lithium-polymer tool battery and a battery powered tool are also part of the invention.
    Type: Grant
    Filed: November 9, 2021
    Date of Patent: March 5, 2024
    Assignee: TECHTRONIC POWER TOOLS TECHNOLOGY LIMITED
    Inventors: Denis Gaston Fauteux, Wing Keung Woo
  • BATTERY PACK, TOOL BATTERY AND BATTERY OPERATED TOOL
    Publication number: 20220069366
    Abstract: A lithium-polymer based battery pack for power a hand held power tool or a garden tool, the battery pack has a plurality of battery cells located within housing that is selectively connectable to and supportable by a hand held power tool or a garden tool. The battery cells have a lithium-polymer based chemistry and a nominal charged internal impedance of less than or equal to approximately 5 milliohms. In one embodiment the cells are think cells are stacked within the housing such that each sell is layered over or under an adjacent cell and a resiliently deformable substrate located between adjacent battery cells. In another embodiment the cells may be interconnected to have a combined output voltage of at least 9 volts and to produce a combined average discharge current of greater than 20 amps. A lithium-polymer tool battery and a battery powered tool are also part of the invention.
    Type: Application
    Filed: November 9, 2021
    Publication date: March 3, 2022
    Inventors: Denis Gaston Fauteux, Wing Keung Woo
  • Battery pouch, battery cell and method of making a pouch or battery cell
    Patent number: 11165126
    Abstract: A pouch-type battery comprising: a pouch-type battery case having a joined wall and a cell space within the pouch, a battery cell within the cell space, a terminal tab extending outwardly of the cell space from the battery cell, said joined wall comprising at least a first sealing portion having a first sealing strength, and a second sealing portion having a second sealing strength that is less than the first sealing strength such that the second sealing portion is adapted to fail before said first sealing portion, and an electrical contact located with the second sealing portion and adapted to change contact state upon failure of the second sealing portion.
    Type: Grant
    Filed: August 12, 2019
    Date of Patent: November 2, 2021
    Assignee: TECHTRONIC CORDLESS GP
    Inventors: Denis Gaston Fauteux, Wing Keung Woo
  • BATTERY POUCH, BATTERY CELL AND METHOD OF MAKING A POUCH OR BATTERY CELL
    Publication number: 20190363332
    Abstract: A pouch-type battery comprising: a pouch-type battery case having a joined wall and a cell space within the pouch, a battery cell within the cell space, a terminal tab extending outwardly of the cell space from the battery cell, said joined wall comprising at least a first sealing portion having a first sealing strength, and a second sealing portion having a second sealing strength that is less than the first sealing strength such that the second sealing portion is adapted to fail before said first sealing portion, and an electrical contact located with the second sealing portion and adapted to change contact state upon failure of the second sealing portion.
    Type: Application
    Filed: August 12, 2019
    Publication date: November 28, 2019
    Inventors: Denis Gaston FAUTEUX, Wing Keung WOO
  • Battery pouch, battery cell and method of making a pouch or battery cell
    Patent number: 10381605
    Abstract: A pouch-type battery comprising: a pouch-type battery case having a joined wall and a cell space within the pouch, a battery cell within the cell space, a terminal tab extending outwardly of the cell space from the battery cell, said joined wall comprising at least a first sealing portion having a first sealing strength, and a second sealing portion having a second sealing strength that is less than the first sealing strength such that the second sealing portion is adapted to fail before said first sealing portion, and an electrical contact located with the second sealing portion and adapted to change contact state upon failure of the second sealing portion.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: August 13, 2019
    Assignee: TTI (MACAO COMMERCIAL OFFSHORE) LIMITED
    Inventors: Denis Gaston Fauteux, Wing Keung Woo
  • BATTERY POUCH, BATTERY CELL AND METHOD OF MAKING A POUCH OR BATTERY CELL
    Publication number: 20170229682
    Abstract: A pouch-type battery comprising: a pouch-type battery case having a joined wall and a cell space within the pouch, a battery cell within the cell space, a terminal tab extending outwardly of the cell space from the battery cell, said joined wall comprising at least a first sealing portion having a first sealing strength, and a second sealing portion having a second sealing strength that is less than the first sealing strength such that the second sealing portion is adapted to fail before said first sealing portion, and an electrical contact located with the second sealing portion and adapted to change contact state upon failure of the second sealing portion.
    Type: Application
    Filed: August 10, 2015
    Publication date: August 10, 2017
    Inventors: Denis Gaston FAUTEUX, Wing Keung WOO
  • BATTERY PACK, TOOL BATTERY AND BATTERY OPERATED TOOL
    Publication number: 20160141728
    Abstract: A lithium-polymer based battery pack for power a hand held power tool or a garden tool, the battery pack has a plurality of battery cells located within housing that is selectively connectable to and supportable by a hand held power tool or a garden tool. The battery cells have a lithium-polymer based chemistry and a nominal charged internal impedance of less than or equal to approximately 5 milliohms. In one embodiment the cells are think cells are stacked within the housing such that each sell is layered over or under an adjacent cell and a resiliently deformable substrate located between adjacent battery cells. In another embodiment the cells may be interconnected to have a combined output voltage of at least 9 volts and to produce a combined average discharge current of greater than 20 amps. A lithium-polymer tool battery and a battery powered tool are also part of the invention.
    Type: Application
    Filed: June 26, 2014
    Publication date: May 19, 2016
    Applicant: Techtronic Power Tools Tecnology Limited
    Inventors: Denis Gaston Fauteux, Wing Keung Woo
  • Materials including semiconductor nanocrystals
    Patent number: 8535758
    Abstract: A composition includes a layer of nanoparticles and a layer of a second material.
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: September 17, 2013
    Assignee: Massachusetts Institute of Technology
    Inventors: Vladimir Bulovic, Seth Coe-Sullivan, Wing-Keung Woo, Moungi G. Bawendi
  • Materials including semiconductor nanocrystals
    Publication number: 20130216707
    Abstract: A composition includes a layer of nanoparticles and a layer of a second material.
    Type: Application
    Filed: December 19, 2007
    Publication date: August 22, 2013
    Applicant: Massachusetts Institute of Technology
    Inventors: Vladimir Bulovic, Seth A. Coe, Wing-Keung Woo, Moungi G. Bawendi
  • LIGHT EMITTING DEVICE INCLUDING SEMICONDUCTOR NANOCRYSTALS
    Publication number: 20100240901
    Abstract: A light emitting device includes a semiconductor nanocrystal in a layer. The layer can be a non-polymeric layer.
    Type: Application
    Filed: March 5, 2010
    Publication date: September 23, 2010
    Inventors: Vladimir Bulovic, Seth A. Coe, Wing-Keung Woo, Moungi G. Bawendi
  • Light emitting device including semiconductor nanocrystals
    Patent number: 7700200
    Abstract: A light emitting device includes a semiconductor nanocrystal in a layer. The layer can be a non-polymeric layer.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: April 20, 2010
    Assignees: Massachusetts Institute of Technology, Universal Display Corporation
    Inventors: Vladimir Bulović, Seth A. Coe, Wing-Keung Woo, Moungi G. Bawendi
  • Layered materials including nanoparticles
    Patent number: 7332211
    Abstract: A composition includes a layer of nanoparticles and a layer of a second material.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: February 19, 2008
    Assignee: Massachusetts Institute of Technology
    Inventors: Vladimir Bulovic, Seth A. Coe, Wing-Keung Woo, Moungi G. Bawendi
  • Curable epoxy compositions, methods and articles made therefrom
    Publication number: 20050181214
    Abstract: A curable epoxy formulation comprises an epoxy monomer, an epoxy oligomer, or a combination thereof; an organofunctionalized colloidal silica; a cure catalyst; and optional reagents. Further embodiments of the present invention include a method for making the curable epoxy formulation and a semiconductor package comprising the curable epoxy formulation. Embodiments of cured formulations can have low coefficients of thermal expansion and/or high glass transition temperatures.
    Type: Application
    Filed: December 7, 2004
    Publication date: August 18, 2005
    Inventors: John Robert Campbell, Slawomir Rubinsztajn, Florian Johannes Schattenmann, Sandeep Shrikant Tonapi, Ananth Prabhakumar, Wing-Keung Woo, Joseph Michael Anostario, Donna Marie Sherman
  • Light emitting device including semiconductor nanocrystals
    Publication number: 20040023010
    Abstract: A light emitting device includes a semiconductor nanocrystal in a layer. The layer can be a non-polymeric layer.
    Type: Application
    Filed: March 28, 2003
    Publication date: February 5, 2004
    Inventors: Vladimir Bulovic, Seth A. Coe, Wing-Keung Woo, Moungi G. Bawendi