Patents by Inventor Boon K. Ching

Boon K. Ching 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: 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
  • Patent number: 5842295
    Abstract: An ironing machine is provided which includes an iron 1 and a stand 2. The iron 1 includes a steam generator 11 in the sole plate 15 of the iron 1. The stand 2 includes a reservoir 21, which is connected to the steam generator 11 by a duct 3. The ironing machine further includes a pump 22 in the duct 3, which pump 22 can be driven by an electric current, and flow-rate adjustment device 41. The flow-rate adjustment device 41 has at least three settings corresponding to different flow-rates of water into the steam generator 11 and includes a control unit 41 and a driver 45 to control the electric current supplied to the pump 22 in dependence on the setting. The control unit 41 has a manually adjustable selector 42 for selecting a setting and a trigger 43 for activating the pump 22. During use the user can depress the trigger 43 when steam operation is required.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: December 1, 1998
    Assignee: U. S. Philips Corporation
    Inventors: Boon K. Ching, Tang P. Har, Albertus P. J. Michels