Patents by Inventor Ambrogio Banfi

Ambrogio Banfi 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).

  • Device for automatically varying the timing of a camshaft
    Patent number: 4535731
    Abstract: This invention relates to a device for automatically varying the timing of a camshaft relative to the drive shaft of an internal combustion engine, comprising an axially slidable splined sleeve which connects the camshaft to its drive pulley, and is operated by the engine lubricating oil in such a manner as to change the angular position of said camshaft by way of valve means controlled by an electromagnetic actuator as a function of at least one engine parameter.
    Type: Grant
    Filed: May 5, 1983
    Date of Patent: August 20, 1985
    Assignee: Alfa Romeo Auto S.p.A.
    Inventor: Ambrogio Banfi
  • Automatic timing variator for an internal combustion engine
    Patent number: 4421074
    Abstract: This invention relates to a timing variator device for an internal combustion engine, comprising a coupling between the cam shaft and the drive gear, which is capable of making angular movements between the coupled parts according to the rotational speed, and in which said movement is actuated by the engine lubricating oil under the control of a valve element constituting the member sensitive to the engine speed.
    Type: Grant
    Filed: July 21, 1981
    Date of Patent: December 20, 1983
    Assignee: Alfa Romeo S.p.A.
    Inventors: Giampaolo Garcea, Ambrogio Banfi, Michele L. Di Stefano