Patents by Inventor Cheuk Fu Leung

Cheuk Fu Leung 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).

  • Positive temperature co-efficient heating element assembly and appliance incorporating the heating element assembly
    Patent number: 8405008
    Abstract: A heating element for an electrical appliance, such as an electric razor. The element has a hollow metallic sleeve having first and second sides. The first side of the sleeve has greater thermal mass than the second side of the sleeve. A positive temperature coefficient ceramic element is located within the sleeve and held in thermal contact with the sleeve by a compressed portion of the sleeve.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: March 26, 2013
    Assignee: Simatelex Manufactory Co. Ltd.
    Inventor: Cheuk Fu Leung
  • POSITIVE TEMPERATURE CO-EFFICIENT HEATING ELEMENT
    Publication number: 20110215082
    Abstract: A heating element for an electrical appliance, such as an electric razor. The element has a hollow metallic sleeve having first and second sides. The first side of the sleeve has greater thermal mass than the second side of the sleeve. A positive temperature coefficient ceramic element is located within the sleeve and held in thermal contact with the sleeve by a compressed portion of the sleeve.
    Type: Application
    Filed: March 5, 2010
    Publication date: September 8, 2011
    Applicant: SIMATELEX MANUFACTORY CO. LTD
    Inventor: Cheuk Fu Leung