Patents by Inventor Wilhelm Tonhauser

Wilhelm Tonhauser 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: 5385170
    Abstract: A multiway valve, in particular a 4/2-way valve, has a housing provided with an axial hole having a plurality of steps to form four seat elements located one behind the other. The housing includes two end chambers and at least two intermediate spaces between these end chambers, with one of the valve connections opening into each. A spool-type drive pin carrying at least two closing elements is located in the axial hole. The drive pin is guided so as to seal at its one end and is radially supported in the axial hole by radial protrusions at its other end. This drive pin has a longitudinal passage which is connected to the first chamber via radial holes at its one end and to the second chamber via its opening provided on the related end of the drive pin at its other end. The closing elements are partially elastically flexible and interact with the seat elements.
    Type: Grant
    Filed: August 3, 1993
    Date of Patent: January 31, 1995
    Assignee: Mercedes-Benz AG
    Inventors: Wilhelm Tonhauser, Gunter Kellermann, Frank Thoma
  • Patent number: 5275207
    Abstract: A multiway valve, in particular a 4/2-way valve, has a housing provided with an axial hole having a plurality of steps to form four seat elements located one behind the other. The housing includes two end chambers and at least two intermediate spaces between these end chambers, with one of the valve connections opening into each. A spool-type drive pin carrying at least two closing elements is located in the axial hole. The drive pin is guided so as to seal at its one end and is radially supported in the axial hole by radial protrusions at its other end. This drive pin has a longitudinal passage which is connected to the first chamber via radial holes at its one end and to the second chamber via its opening provided on the related end of the drive pin at its other end. The closing elements are partially elastically flexible and interact with the seat elements.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: January 4, 1994
    Assignee: Mercedes-Benz AG
    Inventors: Wilhelm Tonhauser, Gunter Kellerman, Frank Thoma