Patents by Inventor Kevin J. Puddephatt

Kevin J. Puddephatt 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).

  • Tool making
    Patent number: 5345052
    Abstract: A trial tool for injection moulding is made by subjecting a cast Zn alloy tool blank to rapid EDM, using a first electrode and a relatively large EDM gap, to produce a coarse surface closely approximating to the required shape, and then subjecting the coarse tool to slow EDM, using a second electrode and a smaller EDM gap, to produce a trial tool having an operative surface of the required shape. A production tool is then made by subjecting a cast steel tool blank to rapid EDM, using the second electrode, and then subjecting the coarse production tool to slow EDM, using a third electrode.
    Type: Grant
    Filed: December 10, 1992
    Date of Patent: September 6, 1994
    Assignee: Nissan European Technology Centre Limited
    Inventor: Kevin J. Puddephatt