Patents by Inventor Josef Lederhaas

Josef Lederhaas 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).

  • Filter for cleaning lubricating oil in internal combustion engines
    Patent number: 4036755
    Abstract: A filter housing for accommodating at least one filter insert to filter lubricating oil, which is provided in the installed position with a geodetically upper assembly opening for inserting and interchanging the filter insert and with a geodetically lower base; the housing interior space is connected by way of two separate housing channels extending in the base, with one housing connection each for the inlet of dirty oil and for the outlet of clean oil; the housing interior space can also be connected with a housing connection separate from the housing connection for the inlet of dirty oil by way of a drainage connection adapted to be closed off by means of a closure device which can be opened at will.
    Type: Grant
    Filed: December 19, 1975
    Date of Patent: July 19, 1977
    Assignee: Daimler-Benz Aktiengesellschaft
    Inventors: Wolfram Dahm, Josef Lederhaas, Roland Merkle, Horst Lutz, Peter Moser, Friedrich Noltemeyer, Heinz Roger