Patents by Inventor Manfred Hellerbach

Manfred Hellerbach 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).

  • Intake manifold for an internal combustion engine
    Patent number: 5129368
    Abstract: In an intake manifold, long individual intake pipes (2,2a,2b,2c) lead from a collective intake pipe (1) to the cylinders (3,3a,3b,3c) of an internal combustion engine. A transverse pipe (5) communicates with the individual intake pipes (2,2a,2b,2c) via resonance pipes (6,6a,6b,6c) which lead to the individual intake pipes (2,2a,2b,2c) from the transverse pipe (5). Communication with the transverse pipe (5) is only via the resonance pipes (6,6a,6b,6c). Cutoff devices (7) enable blockage of the connection between the transverse pipe (5) and the individual intake pipes (2,2a,2b,2c) at low engine speeds.
    Type: Grant
    Filed: May 2, 1991
    Date of Patent: July 14, 1992
    Assignee: General Motors Corporation
    Inventors: Manfred Kristl, Manfred Hellerbach