Patents by Inventor Yuan Kun Zhang

Yuan Kun Zhang 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: 6441348
    Abstract: Apparatus for melting a solid mass of wax is disclosed. The apparatus comprises a housing having a base and a sidewall. A heating element is disposed inside the housing and positioned near the base for generating heat. A heat conducting plate is positioned above the heating element for conducting the heat from the heating element to melt a bottom surface of the solid mass of wax. A control circuit is provided for automatically controlling a temperature of the heating element. In operation, the apparatus performs a fast and efficient method for melting wax. A bottom surface of the solid wax mass is melted into a bottom layer of melted wax using the heating element. The heating element is shut off once the bottom layer of melted wax reaches a desired volume. A portion of the bottom layer of melted wax is transferred to a top surface of the solid wax mass to create a top layer of melted wax, so that a remaining core of solid wax mass is disposed between the top and bottom layers of melted wax.
    Type: Grant
    Filed: January 10, 2001
    Date of Patent: August 27, 2002
    Assignee: Raymond Industrial Limited
    Inventors: Zheng Qing Yang, Yuan Kun Zhang
  • Publication number: 20020088791
    Abstract: Apparatus for melting a solid mass of wax is disclosed. The apparatus comprises a housing having abase and a sidewall. A heating element is disposed inside the housing and positioned near the base for generating heat. A heat conducting plate is positioned above the heating element for conducting the heat from the heating element to melt a bottom surface of the solid mass of wax. A control circuit is provided for automatically controlling a temperature of the heating element. In operation, the apparatus performs a fast and efficient method for melting wax. A bottom surface of the solid wax mass is melted into a bottom layer of melted wax using the heating element. The heating element is shut off once the bottom layer of melted wax reaches a desired volume. A portion of the bottom layer of melted wax is transferred to a top surface of the solid wax mass to create a top layer of melted wax, so that a remaining core of solid wax mass is disposed between the top and bottom layers of melted wax.
    Type: Application
    Filed: January 10, 2001
    Publication date: July 11, 2002
    Inventors: Zheng Qing Yang, Yuan Kun Zhang
  • Patent number: 6310322
    Abstract: A heated roller assembly includes a heating platform, a plurality of rollers disposed on the heating platform and a circuit for automatically controlling a surface temperature of each roller. The heated rollers of the heated roller assembly include an outer portion and an inner portion disposed within the outer portion. The inner portion is made of thermoset plastic and includes a groove and a heating element disposed within the groove.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: October 30, 2001
    Assignee: Raymond Industrial Limited
    Inventors: Zheng Qing Yang, Yuan Kun Zhang