Patents by Inventor Eberhard Hofman

Eberhard Hofman 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: 4524737
    Abstract: A fuel injection apparatus having an auxiliary pump for pilot and main injections in internal combustion engines, in which a pilot injection quantity pumped by a low-pressure pump is stored ahead of a pilot injection piston embodied as a pressure piston, which is driven by a following but coaxially disposed intermediate piston, upon pumping by the high-pressure injection pump, and as a result positively displaces the pilot injection quantity. Both pistons are supported in an intermediate element between the connection piece of an injection valve and the nozzle holder of the valve. The intermediate element combines not only the elements for the auxiliary pump but also the leak-off bores from the nozzles with the leak-off removal means of the two-part stepped piston supported therein.
    Type: Grant
    Filed: August 24, 1984
    Date of Patent: June 25, 1985
    Assignee: Robert Bosch GmbH
    Inventor: Eberhard Hofman