Patents by Inventor John Stuart Hollingshead

John Stuart Hollingshead 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).

  • Fan shroud with built in noise reduction
    Patent number: 6896095
    Abstract: The present invention is a system and method to significantly reduce noise associated with air-moving devices such as an axial flow fan using a fan shroud and barrel combination with built in silencers such as Helmholtz resonators. The invention can be applied to a variety of applications such as a thermal management system for a fuel cell powered vehicle. The resonator can be a hollow cavity in networks attached to an outer or inner barrel or shroud and tuned to reduce noise at predetermined noise frequency ranges within the airflow. The invention can also attach stator members on the inner surface of the outer barrel to further reduce noise. Additional sound absorbing material, such as steel wool, can be disposed within the resonator cavity.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: May 24, 2005
    Assignee: Ford Motor Company
    Inventors: Hemant S. Shah, John Stuart Hollingshead, John Wang, Prakash Tuljaram Thawani, Richard Charles Kosik, Mukesh Kumar
  • Fan shroud with built in noise reduction
    Publication number: 20030183446
    Abstract: The present invention is a system and method to significantly reduce noise associated with air-moving devices such as an axial flow fan using a fan shroud and barrel combination with built in silencers such as Helmholtz resonators. The invention can be applied to a variety of applications such as a thermal management system for a fuel cell powered vehicle. The resonator can be a hollow cavity in networks attached to an outer or inner barrel or shroud and tuned to reduce noise at predetermined noise frequency ranges within the airflow. The invention can also attach stator members on the inner surface of the outer barrel to further reduce noise. Additional sound absorbing material, such as steel wool, can be disposed within the resonator cavity.
    Type: Application
    Filed: March 26, 2002
    Publication date: October 2, 2003
    Applicant: Ford Motor Company
    Inventors: Hemant S. Shah, John Stuart Hollingshead, John Wang, Prakash Tuljaram Thawani, Richard Charles Kosik