Patents by Inventor Leonard Coffman

Leonard Coffman 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).

  • Fluid cooled acyclic generator rotor having a copper conductor diffusion bonded to a magnetic steel core
    Patent number: 4692644
    Abstract: An internally cooled rotor for an acyclic generator has a ferromagnetic steel core to which is diffusion bonded a cylindrical copper conductor in which is embedded a multiplicity of cooling tubes communicating with coolant passages formed in the core. The cooling tubes are implanted in a hot isostatic pressure process during which the copper cylinder is at least in part created by the densification of copper powder to a non-porous mass.
    Type: Grant
    Filed: October 27, 1986
    Date of Patent: September 8, 1987
    Assignee: General Electric Company
    Inventors: Henry G. Lenz, Leonard Coffman, Adrian M. Beltran
  • Method for making a fluid cooled acyclic generator rotor
    Patent number: 4679314
    Abstract: An internally cooled rotor for an acyclic generator is disclosed as having a ferromagnetic steel core to which is diffusion bonded a cylinder copper conductor in which is embedded a multiplicity of cooling tubes communicating with coolant passages formed in the core. The cooling tubes are implanted in a hot isostatic pressure process during which the copper cylinder is at least in part created by the densification of copper powder to a non-porous mass.
    Type: Grant
    Filed: December 23, 1985
    Date of Patent: July 14, 1987
    Assignee: General Electric Company
    Inventors: Henry G. Lenz, Leonard Coffman, Adrian M. Beltran