Patents by Inventor Derek Graeme Madgewick Savidge

Derek Graeme Madgewick Savidge 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).

  • Vacuum pumping system and method of controlling the same
    Patent number: 7101155
    Abstract: A vacuum pump system (10; 36; 46) for pumping gas from an enclosure (12) comprises: a vacuum pump unit (14) having a pump inlet (16) connectable with an outlet (18) of such an enclosure and a pump outlet (20) for exhausting gas; and a chamber (22; 50) selectively connectable with the pump inlet and the pump outlet, such that, in use, in a first state gas can be pumped from the chamber to the pump inlet by the vacuum pump unit and in a second state gas can be evacuated from the pump outlet to the chamber to reduce pressure at the pump outlet. A method of controlling the vacuum pump system (10; 36; 46) comprises a first step of pumping gas from the chamber to the pump inlet using the vacuum pump unit and a second step of allowing gas to be evacuated from the pump outlet to the chamber to reduce pressure at the pump outlet.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: September 5, 2006
    Assignee: The BOC Group Plc
    Inventors: Derek Graeme Madgewick Savidge, Neil Turner, Graeme Huntley
  • Vacuum pumping system and method of controlling the same
    Publication number: 20040126244
    Abstract: A vacuum pump system (10; 36; 46) for pumping gas from an enclosure (12) comprises: a vacuum pump unit (14) having a pump inlet (16) connectable with an outlet (18) of such an enclosure and a pump outlet (20) for exhausting gas; and a chamber (22; 50) selectively connectable with the pump inlet and the pump outlet, such that, in use, in a first state gas can be pumped from the chamber to the pump inlet by the vacuum pump unit and in a second state gas can be evacuated from the pump outlet to the chamber to reduce pressure at the pump outlet.
    Type: Application
    Filed: May 15, 2003
    Publication date: July 1, 2004
    Applicant: The BOC Group plc
    Inventors: Derek Graeme Madgewick Savidge, Neil Turner, Graeme Huntley