Patents by Inventor Dean Duffield

Dean Duffield 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 of making aerosol valve mounting cups and resultant cups
    Patent number: 8118197
    Abstract: Metal discs, preferably circular, are cut to a precise diameter and drawn to a preform with a channel and skirt for an aerosol valve mounting cup. The preform then undergoes further forming operations at stations in a press system. “Bumping” is carried out on the skirt edge at a station, to eliminate non-burr trimming of the cup edge, save material and obtain a carefully controlled skirt height and a substantially even skirt edge with minimized earring. The resultant cup terminating skirt edge is characterized by reformed metal. A further coaxing or pinch-cut operation may be performed on the cup skirt.
    Type: Grant
    Filed: June 18, 2007
    Date of Patent: February 21, 2012
    Assignee: Precision Valve Corporation
    Inventor: Dean Duffield
  • Method of making aerosol valve mounting cups and resultant cups
    Publication number: 20080308582
    Abstract: Metal discs, preferably circular, are cut to a precise diameter and drawn to a preform with a channel and skirt for an aerosol valve mounting cup. The preform then undergoes further forming operations at stations in a press system. “Bumping” is carried out on the skirt edge at a station, to eliminate non-burr trimming of the cup edge, save material and obtain a carefully controlled skirt height and a substantially even skirt edge with minimized earring. The resultant cup terminating skirt edge is characterized by reformed metal. A further coaxing or pinch-cut operation may be performed on the cup skirt.
    Type: Application
    Filed: June 18, 2007
    Publication date: December 18, 2008
    Applicant: Precision Valve Corporation
    Inventor: Dean Duffield