Patents by Inventor Daniel Baetschmann

Daniel Baetschmann 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).

  • Process of forming openings
    Patent number: 4807587
    Abstract: In a process using a hand-held drilling device for forming openings in a construction material containing steel reinforcing members, during the drilling step the electrical resistance between the drill bit and the reinforcing members is continuously measured. If the drill bit contacts the reinforcing member the measuring circuit is shorted out and the electrical resistance drops. The drop in resistance can be used as a signal for cutting power to the drilling device or for declutching or braking the device.
    Type: Grant
    Filed: September 17, 1987
    Date of Patent: February 28, 1989
    Assignee: Hilti Aktiengesellschaft
    Inventors: Daniel Baetschmann, Hansjorg Nipp, Karl Blaas