Patents by Inventor Shenhua Yu

Shenhua Yu 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: 7472504
    Abstract: A steam iron having a soleplate and a steam generator comprises a heater circuit (40) having two parallel loops (44, 45), wherein a main soleplate heating element (41) is arranged in a first loop (44), and wherein an auxiliary soleplate heating element (42) and a steam generator heating element (43) are arranged in a second loop (45). In the second loop (45), a selector switch (46) is arranged, for either connecting the auxiliary soleplate heating element (42) or the steam generator heating element (43) to an electric power source (50). A position of the selector switch (46) is determinative of an operating condition of the heater circuit (40). In one possible operating condition, both soleplate heating elements (41, 42) are connected to the electric power source (50). In this operating condition, the soleplate is heated up fast, as all available electric power is used for heating the soleplate.
    Type: Grant
    Filed: November 8, 2005
    Date of Patent: January 6, 2009
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Shenhua Yu, Mohankumar Valiyambath Krishnan
  • Publication number: 20080229628
    Abstract: A steam ironing device (1) comprises a steam generator (20) for heating water to steam, a steam outlet (25) for letting out a burst of steam (27) from the steam generator (20), a device (30) for supplying water to the steam generator (20), a hose (40) connecting the water supplying device (30) to the steam generator (20), and a controller (50) which is adapted to operating the water supplying device (30) during a period of time in a situation in which there is hardly any need or no need at all of a supply of steam in an ironing process, while keeping the steam outlet (25) closed. In this way, a reserve amount of steam is generated, which is stored in an internal space (21) of the steam generator (20), and, as the occasion arises, inside at least a portion of the hose (40). When a burst of steam (27) is required, the reserve amount of steam is released through the steam outlet (25).
    Type: Application
    Filed: July 18, 2006
    Publication date: September 25, 2008
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Mohankumar Valiyambath Krishnan, Shenhua Yu