Patents by Inventor David Giannelli

David Giannelli 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).

  • Patent number: 8172061
    Abstract: A friction material is provided for a friction member of a torque-transmitting mechanism. The friction member has a woven carbon fiber fabric base. A coating is applied to the base to form a portion of a contact surface positioned to contact a reaction member during engagement of the torque-transmitting mechanism. The coating is a mixture of a resin binder and a friction modifier. A method of forming a friction material is also provided.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: May 8, 2012
    Assignees: GM Global Technology Operations LLC, Ballard Material Products
    Inventors: John Gaffney, David Giannelli, Roger Masse, Timothy Anguish
  • Publication number: 20100078287
    Abstract: A friction material is provided for a friction member of a torque-transmitting mechanism. The friction member has a woven carbon fiber fabric base. A coating is applied to the base to form a portion of a contact surface positioned to contact a reaction member during engagement of the torque-transmitting mechanism. The coating is a mixture of a resin binder and a friction modifier. A method of forming a friction material is also provided.
    Type: Application
    Filed: September 26, 2008
    Publication date: April 1, 2010
    Applicants: GM GLOBAL TECHNOLOGY OPERATIONS, INC., BALLARD MATERIAL PRODUCTS
    Inventors: John Gaffney, David Giannelli, Roger Masse, Timothy Anguish
  • Publication number: 20060016550
    Abstract: A carbon friction material, preferably a woven carbon friction material, wherein a binder such as an epoxy or phenolic resin is used to strengthen and impart rigidity to the friction material. The friction material has a graded concentration of the binder such that the friction surface may have substantially no binder. A reinforcing substrate such as a fiberglass backing may also be present. The coefficient of friction at the friction surface may be further increased by, for example, shaving the surface such that a plurality of fibers become oriented in a direction perpendicular to the friction surface.
    Type: Application
    Filed: June 20, 2005
    Publication date: January 26, 2006
    Inventors: Donald Connors, David Giannelli, Robert Pepper
  • Publication number: 20050158468
    Abstract: Carbon-composite materials can be useful for a wide range of applications such as in friction applications as found in automotive continuous slip service in torque converter clutches. Carbon-composites may also be used as fluid diffusion layers in electrochemical fuel cells. Continuous processing of such carbon composites, though long found to be difficult due to unacceptably long dwell times can be done with the use of propane as the hydrocarbon gas, particularly when done at temperatures between 1200 and 2000° C. and 0.1 and 1 mm Hg. In particular, such methods lead to carbon composites with suitable frictional properties.
    Type: Application
    Filed: January 20, 2004
    Publication date: July 21, 2005
    Inventors: John Gaffney, David Giannelli, Roger Masse, Raymond Loszewski, Robert Froberg
  • Publication number: 20040147192
    Abstract: A carbon friction material, preferably a woven carbon friction material, wherein a binder such as an epoxy or phenolic resin is used to strengthen and impart rigidity to the friction material. The friction material has a graded concentration of the binder such that the friction surface may have substantially no binder. A reinforcing substrate such as a fiberglass backing may also be present. The coefficient of friction at the friction surface may be further increased by, for example, shaving the surface such that a plurality of fibers become oriented in a direction perpendicular to the friction surface.
    Type: Application
    Filed: January 24, 2003
    Publication date: July 29, 2004
    Applicant: Ballard Material Products Inc.
    Inventors: Donald F. Connors, David Giannelli, Robert W. Pepper