Patents by Inventor Manfred Hess

Manfred Hess 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).

  • Fuel pump, in particular for an internal combustion engine with direct injection
    Patent number: 6889662
    Abstract: A fuel pump for use in a fuel injection system includes a housing at least one piston defining a work chamber and drive means which put the piston into a reciprocating motion in the chamber. An inlet conduit and an outlet conduit can be made to communicate with the work chamber. A first valve device is provided between the inlet conduit and the work chamber, and a second valve device is provided between the work chamber and the outlet conduit. The valve element of one valve device has a guide portion, which is received in a guide opening embodied in the valve element of the other valve device, and the circumferential face of the guide portion and/or of the guide opening has at least one recess, by which the contact area between the guide portion and the guide opening is reduced.
    Type: Grant
    Filed: April 21, 2003
    Date of Patent: May 10, 2005
    Assignee: Robert Bosch GmbH
    Inventor: Manfred Hess
  • Fuel pump, in particular for an internal combustion engine with direct injection
    Publication number: 20040016420
    Abstract: A fuel pump for use in a fuel injection system includes a housing at least one piston defining a work chamber and drive means which put the piston into a reciprocating motion in the chamber. An inlet conduit and an outlet conduit can be made to communicate with the work chamber. A first valve device is provided between the inlet conduit and the work chamber, and a second valve device is provided between the work chamber and the outlet conduit. The valve element of one valve device has a guide portion, which is received in a guide opening embodied in the valve element of the other valve device, and the circumferential face of the guide portion and/or of the guide opening has at least one recess, by which the contact area between the guide portion and the guide opening is reduced.
    Type: Application
    Filed: April 21, 2003
    Publication date: January 29, 2004
    Applicant: Robert Bosch GmbH
    Inventor: Manfred Hess