Patents by Inventor Jakob Trumpf

Jakob Trumpf 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).

  • Spindle extension, especially for drilling and milling machines
    Patent number: 4334811
    Abstract: A spindle extension, especially for drilling and milling machines, is required when machining large size workpieces. In order to enable the automatic tool change also when there is mounted the spindle extension with the available tools, the inventive spindle extension is provided with a chucking clamp which possesses a chucking or clamping pin which can be engaged by the chucking clamp of the tool spindle.
    Type: Grant
    Filed: September 9, 1980
    Date of Patent: June 15, 1982
    Assignee: Werkzeugmaschinenfabrik Oerlikon-Buhrle AG
    Inventors: Jakob Trumpf, Hansueli Keller