Patents by Inventor Ralf Tomaschek

Ralf Tomaschek 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).

  • Key switch with a device for key monitoring
    Patent number: 7351924
    Abstract: A key switch is disclosed, including a key channel for receiving a key and including a key-insertion-dependent switching mechanism. The switching mechanism exhibits a device for key monitoring. A key switch is specified which can be inexpensively manufactured and exhibits additional security-related options. For this purpose, the key switch exhibits a device for key monitoring which exhibits a quasi-rigid system arranged axially in the key channel, which are provided for key ejection and for operating a switching element.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: April 1, 2008
    Assignee: Siemens Aktiengesellschaft
    Inventors: Josef Scherl, Ralf Tomaschek, Rudolf Zimmermann
  • Key switch with a device for key monitoring
    Publication number: 20070199807
    Abstract: A key switch is disclosed, including a key channel for receiving a key and including a key-insertion-dependent switching mechanism. The switching mechanism exhibits a device for key monitoring. A key switch is specified which can be inexpensively manufactured and exhibits additional security-related options. For this purpose, the key switch exhibits a device for key monitoring which exhibits a quasi-rigid system arranged axially in the key channel, which are provided for key ejection and for operating a switching element.
    Type: Application
    Filed: April 14, 2006
    Publication date: August 30, 2007
    Inventors: Josef Scherl, Ralf Tomaschek, Rudolf Zimmermann