Patents by Inventor Patrick James Campbell

Patrick James Campbell 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).

  • Inhaler valve mechanism
    Patent number: 7597098
    Abstract: A valve mechanism is provided for use in an inhaler comprising a pressurized container, and a metering chamber, and a valve mechanism wherein the inlet and outlet valves are separate and can be operated independently. The pressure of the fluid in the canister is used to aid the opening of the outer valve so reducing the force to fire a dose. A variant of the valve mechanism allows the user to select from a range of dose volumes by appropriate orientation of the stem.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: October 6, 2009
    Assignee: The Technology Partnership PLC
    Inventors: Graham Scott Gutsell, Nicholas John Bowman, Iain Grierson McDerment, Patrick James Campbell