Patents by Inventor Robert B. Jerard

Robert B. Jerard 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).

  • Publication number: 20080161959
    Abstract: A system and method for monitoring tool wear in CNC machining operations by monitoring spindle power and extracting instantaneous cutting geometry. The method is based on a physics-based two parameter process model and measuring at two different cutting conditions. The process model parameters are measured with easily accessible spindle power. In contrast to spindle power alone which is influenced by many factors, most especially by variable cutting conditions and by the tool condition, the process model parameters are independent of the geometrically variable cutting conditions and provide a simple and direct measure of tool wear. The two process model parameters change differently depending on the mechanism of the tool wear, specifically flank wear versus cutting edge degradation. This provides a diagnostic for tool wear.
    Type: Application
    Filed: December 3, 2007
    Publication date: July 3, 2008
    Inventors: Robert B. Jerard, Donald Esterling, Barry K. Fussell, Min Xu, Chad Schuyler
  • Patent number: 4412962
    Abstract: Improved mold structure and method of molding for mechanically frothed urethane foams is presented. The mold is filled from the bottom via an annular runner which communicates with the mold cavity. The connection between the annular runner and the mold cavity is restricted to create a back pressure in the circumferential runner.
    Type: Grant
    Filed: August 30, 1982
    Date of Patent: November 1, 1983
    Assignee: Rogers Corporation
    Inventors: Michael D. Bessette, Robert B. Jerard
  • Patent number: 4393450
    Abstract: A three-dimensional model-making system that employs a cutting wire under tension and acting in a reciprocating mode to shape an easily-machinable material. The machine has three servo-driven axes including an x and y axis and a rotational axis.
    Type: Grant
    Filed: August 11, 1980
    Date of Patent: July 12, 1983
    Assignee: Trustees of Dartmouth College
    Inventor: Robert B. Jerard