Patents Assigned to Ballard Material Products
  • Clutch friction material and method of forming same
    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
  • Clutch Friction Material and Method of Forming Same
    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
  • Carbon fiber friction material
    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
  • Carbon-matrix composites, compositions and methods related thereto
    Patent number: 6638883
    Abstract: The present invention relates to carbon-matrix composites, such as carbon—carbon composites, and a method for forming them by forming a fabric of fusible and infusible fibers which can be processed and carbonized to form a composite. The methods disclosed herein permit preparation of composites which are particularly thin, uniform, and highly pure. The invention also relates to preprocessed fabrics and precarbonized composites, such as those comprising carbon or oxidized polyacrylonitrile fibers and fusible polyacrylonitrile fibers.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: October 28, 2003
    Assignee: Ballard Material Products Inc.
    Inventors: John J. Gaffney, Raymond C. Loszewski