Patents by Inventor Ulrich Steffenhagen

Ulrich Steffenhagen 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).

  • Device for temporarily blocking the re-measurement of an electric oil level measurement of a machine, particularly an internal combustion engine
    Patent number: 4943797
    Abstract: A device for electrically measuring the oil level of a machine, particularly of an internal combustion engine, is connected with a device for temporarily blocking re-measurement. The device for the measurement of the oil level comprises a measurement probe (2) which is heated by a constant current during a connect time which is commenced in an automotive vehicle by a switch on a battery terminal (15). Furthermore, means are provided for comparing an initial voltage U.sub.O of the measurement probe at the start of the connect time with a measured voltage at the end of the connect time of a measurement period in order to form a result of the comparison which corresponds to the oil level. A signalling logic (7) which signals ranges of the oil level can be controlled by said result. The blocking-time transmitter, in combination with a control logic (10) for the total program control, blocks repeated measurement during at least one predetermined period of time after the machine is turned off or again turned on.
    Type: Grant
    Filed: September 5, 1989
    Date of Patent: July 24, 1990
    Assignee: VDO Adolf Schindling AG
    Inventor: Ulrich Steffenhagen
  • Device for temporarily blocking the re-measurement of an electric oil level measurement of a machine, particularly an internal combustion engine
    Patent number: 4739301
    Abstract: A device for electrically measuring the oil level of a machine, particularly of an internal combustion engine, is connected with a device for temporarily blocking re-measurement. The device for the measurement of the oil level comprises a measurement probe (2) which is heated by a constant current during a connect time which is commenced in an automotive vehicle by a switch on a battery terminal (15). Furthermore, means are provided for comparing an initial voltage U.sub.O of the measurement probe at the start of the connect time with a measured voltage at the end of the connect time of a measurement period in order to form a result of the comparison which corresponds to the oil level. A signalling logic (7) which signals ranges of the oil level can be controlled by said result. The blocking-time transmitter, in combination with a control logic (10) for the total program control, blocks repeated measurement during at least one predetermined period of time after the machine is turned off or again turned on.
    Type: Grant
    Filed: August 6, 1985
    Date of Patent: April 19, 1988
    Assignee: VDO Adolf Schindling AG
    Inventor: Ulrich Steffenhagen