Patents by Inventor Harold J. Fraboni

Harold J. Fraboni 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).

  • Back drive silent chain system with low profile sprocket
    Patent number: 7229375
    Abstract: A silent chain and sprocket assembly is disclosed for use with a chain tensioner that provides driving contact on both sides of the chain and improved system wear, noise and vibration characteristics without adding to the chain's weight or material costs. The front-side sprockets employ sprocket teeth and engage the front-side silent chain links in conventional fashion. The back-side driven sprockets differ from prior silent chain sprockets in that the sprockets employ small protrusions instead of traditional teeth. The silent chain engages a back-side sprocket protrusion using the geometry of either a single link, or that of two adjacent links, as the chain wraps on the back-side sprocket.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: June 12, 2007
    Assignee: BorgWarner Inc.
    Inventors: John A. Hummel, Harold J. Fraboni
  • Back drive silent chain system with low profile sprocket
    Publication number: 20020155911
    Abstract: A silent chain and sprocket assembly is disclosed for use with a chain tensioner that provides driving contact on both sides of the chain and improved system wear, noise and vibration characteristics without adding to the chain's weight or material costs. The front-side sprockets employ sprocket teeth and engage the front-side silent chain links in conventional fashion. The back-side driven sprockets differ from prior silent chain sprockets in that the sprockets employ small protrusions instead of traditional teeth. The silent chain engages a back-side sprocket protrusion using the geometry of either a single link, or that of two adjacent links, as the chain wraps on the back-side sprocket.
    Type: Application
    Filed: April 23, 2001
    Publication date: October 24, 2002
    Inventors: John A. Hummel, Harold J. Fraboni
  • Roller chain sprockets oriented to minimize strand length variation
    Patent number: 6213905
    Abstract: The present invention is directed to a roller chain and sprocket drive which has at least two sprockets with varied radial seating positions. The relative orientation of the sprockets are adjusted to provide favorable dynamics to the drive. This can include the minimization of the strand variation and providing the maximum strand variation for each chain strand to be phased differently than other strands.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: April 10, 2001
    Assignee: BorgWarner Inc.
    Inventors: David C. White, Harold J. Fraboni