Patents by Inventor Kam W. Choy

Kam W. Choy 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: 6986218
    Abstract: The invention relates to a method of connecting a housing part (1) of an iron to a water tank (2) of the iron. The water tank (2) comprises a top part (3) and a bottom part (4). The method includes a watertight connection between these top and bottom parts. To make a simple and inexpensive connection between the housing part (10) and the water tank parts (3, 4) an edge (15) of the housing part (1), an edge (10) of the top part (3) of the water tank (2) and an edge (8) of the bottom part (4) of the water tank (2) are connected to each other in a single process step by means of mirror welding.
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: January 17, 2006
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Kam W. Choy, Siew C. Yeo
  • Patent number: 6105286
    Abstract: A device for ironing laundry having a regulating device and a drip-stop valve arranged in series in a passageway between the water tank and the steam chamber for supplying cold water to the steam chamber for normal steaming operation and a bypass which bypasses the drip-stop valve and in which a valve is arranged for supplying a large amount of cold water directly to the steam chamber for cleaning the steam chamber. For an effective cleaning the location where cold water for cleaning the steam chamber is supplied to the steam chamber is substantially the same as the location where cold water for normal steaming operation during ironing is supplied to the steam chamber.
    Type: Grant
    Filed: February 25, 1999
    Date of Patent: August 22, 2000
    Assignee: U.S. Philips Corporation
    Inventors: Boon K. Ching, Kam W. Choy, Lid J. Lim, Kai H. Kwok