Patents by Inventor Richard H. Middleton

Richard H. Middleton 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).

  • Method and apparatus for purging a propellant from a filling head during the filling of an aerosol container
    Patent number: H2205
    Abstract: A method and apparatus for minimizing propellant emissions during the filling of an aerosol container that has a valve attached thereto and a valve stem extending from the valve. A filling head is disposed in a sealed relationship with a portion of the container so that the valve stem is encased within a recess of the filling head. A pressurized propellant is introduced into the filling head at a sufficient pressure to force the propellant through and around the valve stem and into the container. An incompressible purge medium is introduced into the filling head at a sufficient pressure to force the incompressible purge medium through and around the vale stem, wherein the incompressible purge medium flushes out residual propellant from the filling head and into the container.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: November 6, 2007
    Inventors: Jason D. Andersen, Lienert Josef, Richard H. Middleton, Heinz Spieser