Patents by Inventor Stephan David Hartman

Stephan David Hartman 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).

  • Chain pin for hinge conveyor chains
    Patent number: 7243783
    Abstract: A method of assembling a hinge conveyor chain includes providing adjacent conveyor links formed from a ferritic-pearlitic stainless steel, wherein the adjacent links have interdigitating link ends with openings for receiving a pin, and inserting a pin having a radially outwardly facing surface formed from a steel alloy with more than 0.6 wt. % of carbon and more than 12 wt. % of Cr through the openings of the interdigitating link ends to pivotally link the adjacent links.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: July 17, 2007
    Assignee: Rexnord Flat Top Europe B.V.
    Inventors: Stephan David Hartman, Gijsbertus Johannes Verduijn
  • Chain pin for hinge conveyor chains
    Patent number: 7097032
    Abstract: A chain module according to the invention comprises at least one link from ferritic-pearlitic stainless steel and at least one chain pin, which chain pin comprises an outwardly facing surface formed from a steel alloy which is substantially non-seizing to the ferritic-pearlitic stainless steel of said link. Preferably, the chain pin comprises a steel alloy with more than 0.6 wt. % of carbon and more than 12 wt. % of chromium.
    Type: Grant
    Filed: May 7, 2004
    Date of Patent: August 29, 2006
    Assignee: Rexnord Flattop Europe B.V.
    Inventors: Stephan David Hartman, Gijsbertus Johannes Verduijn
  • Chain pin for hinge conveyor chains
    Publication number: 20040244177
    Abstract: A chain module according to the invention comprises at least one link from ferritic-pearlitic stainless steel and at least one chain pin, which chain pin comprises an outwardly facing surface formed from a steel alloy which is substantially non-seizing to the ferritic-pearlitic stainless steel of said link. Preferably, the chain pin comprises a steel alloy with more than 0.6 wt. % of carbon and more than 12 wt. % of chromium.
    Type: Application
    Filed: May 7, 2004
    Publication date: December 9, 2004
    Inventors: Stephan David Hartman, Gijsbertus Johannes Verduijn