Patents by Inventor Siegfried Schlaf

Siegfried Schlaf 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: 5743470
    Abstract: A fuel injection valve for internal combustion engines includes a valve member, which is axially displaceable in a bore of a valve body and which on its end toward the combustion chamber of the engine has a conical valve sealing face. The conical valve sealing faced cooperates with a conical valve seat face on the closed end of the bore of the valve body toward the combustion chamber. Between the cone angles of the valve sealing face and the valve seat face, a seat angle difference is provided, by which an encompassing seat edge is formed between the valve member and the valve body, and having at least one injection port in the region of the valve seat phase adjoins the seat edge downstream thereof.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: April 28, 1998
    Assignee: Robert Bosch GmbH
    Inventors: Siegfried Schlaf, Friedrich Boecking