Patents by Inventor William Stewart Prince

William Stewart Prince 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).

  • Cleaning apparatus
    Patent number: 10405712
    Abstract: A cleaning apparatus for use in explosive atmospheres is disclosed, the cleaning apparatus being configured to conduct to earth any electrostatic charges generated in the components of the apparatus thereby preventing electrostatic discharge. The apparatus comprises a flexible hose member comprised of an electrically conductive material and having first and second open ends, the hose member being suitable for attachment at its first end to a port of an associated suction unit to mechanically and electrically couple said hose thereto; and a substantially rigid tubular pole member comprised of an electrically conductive material and having first and second open ends, said pole member being mechanically and electrically coupled at said first end to the second end of said hose member.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: September 10, 2019
    Assignee: SPACE VAC TECHNOLOGIES GROUP LIMITED
    Inventors: Andrew Collar, William Stewart Prince
  • Cleaning Apparatus
    Publication number: 20170245709
    Abstract: A cleaning apparatus for use in explosive atmospheres is disclosed, the cleaning apparatus being configured to conduct to earth any electrostatic charges generated in the components of the apparatus thereby preventing electrostatic discharge. The apparatus comprises a flexible hose member comprised of an electrically conductive material and having first and second open ends, the hose member being suitable for attachment at its first end to a port of an associated suction unit to mechanically and electrically couple said hose thereto; and a substantially rigid tubular pole member comprised of an electrically conductive material and having first and second open ends, said pole member being mechanically and electrically coupled at said first end to the second end of said hose member.
    Type: Application
    Filed: September 23, 2016
    Publication date: August 31, 2017
    Inventors: Richard Hugh Costello, Andrew Collar, William Stewart Prince