Patents by Inventor Larry Pfleiderer

Larry Pfleiderer 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 glass tubing
    Patent number: 5743928
    Abstract: An apparatus (10) for extruding glass tubing (12) which comprises a furnace (14). A component (16) within the furnace (14) is for holding molten glass (18). A duplex mandrel (20) on one end of the furnace (14) is connected into the holding component (16). A facility (22) is for forcing the molten glass (18) in the holding component (16) out through the duplex mandrel (20), so as to form the glass tubing (12) having an upper support segment (24) and a lower structural segment (26). An assembly (28) is for quick cooling the upper support segment (24) of the glass tubing (12) upon exiting the duplex mandrel (20), so that the lower structural segment (26) will maintain its desired shape while slow cooling.
    Type: Grant
    Filed: December 16, 1996
    Date of Patent: April 28, 1998
    Inventor: Larry Pfleiderer