Patents by Inventor John Grach

John Grach 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).

  • Magnetic friction clutch
    Patent number: 8020683
    Abstract: A novel magnetic friction clutch is disclosed which is capable of relatively high torque transfer for friction discs of a given diameter, compared to prior art magnetic clutches. A friction coating with good magnetic permeability, such as Ferrous Aluminide or the like, is applied to inner and outer annular regions of the three friction discs and increases the frictional coefficient of the discs with little reduction in the clamping force developed through the clutch.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: September 20, 2011
    Assignee: Magna Closures Inc.
    Inventors: M. Shehokin Borys, John Grach, Dan Cosmin, Victor Gusev
  • Magnetic Friction Clutch
    Publication number: 20080142327
    Abstract: A novel magnetic friction clutch is disclosed which is capable of relatively high torque transfer for friction discs of a given diameter, compared to prior art magnetic clutches. A friction coating with good magnetic permeability, such as Ferrous Aluminide or the like, is applied to inner and outer annular regions of the three friction discs and increases the frictional coefficient of the discs with little reduction in the clamping force developed through the clutch.
    Type: Application
    Filed: December 13, 2007
    Publication date: June 19, 2008
    Inventors: Borys M. Shchokin, John Grach, Dan Cosmin, Victor Gusev