Patents by Inventor Sam D. Nehmey

Sam D. Nehmey 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 extruding foam polymeric materials involving the use of an extrusion screw having spaced multiple flight mixing means thereon
    Patent number: 4401612
    Abstract: Cellular chlorinated polyvinyl chloride resin is made in an extruder that is characterized by a combination of multiple flights and a plurality of open slots in the mixing section to facilitate mixing of the resin and a blowing agent whereby a rigid thermoplastic cellular product of low density is made that has a predominantly closed cell structure.
    Type: Grant
    Filed: June 17, 1981
    Date of Patent: August 30, 1983
    Assignee: The B. F. Goodrich Company
    Inventors: Sam D. Nehmey, James W. Summers
  • Apparatus and method for making foamed resin products
    Patent number: 4393017
    Abstract: Extrusion apparatus and method for making a cellular resin product are characterized by a conduit that extends into the extruder whereby a blowing agent is injected therethrough into the resin through a plurality of ports provided in the conduit in order to disperse the blowing agent more uniformly through the resin before it is extruded through a die into a zone of lower pressure whereupon the blowing agent expands to form numerous cells within the resin structure.
    Type: Grant
    Filed: June 18, 1981
    Date of Patent: July 12, 1983
    Assignee: The B. F. Goodrich Company
    Inventors: Hueng T. Kim, Sam D. Nehmey