Patents by Inventor Dirk Rotthaus

Dirk Rotthaus 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: 4307269
    Abstract: Apparatus is provided for the positive activation of a switching device operated to function after a predetermined number of revolutions of a drive shaft to deactivate a drive prior to the apparatus reaching a stopping point, such as in finishing machines. Two camshafts are provided, with one driven slowly and one driven rapidly through appropriate gearing from the drive shaft of the apparatus. One or more cams are spaced on each camshaft with the slow cams having a short actuating surface and the fast cams having a long activating surface. Each slow and fast activating surface engages, respectively, one end of a toggle lever, which in turn moves a thrust rod to open the switch. Each toggle lever must be engaged simultaneously with a short and a long activating surface to activate the switch.
    Type: Grant
    Filed: December 4, 1979
    Date of Patent: December 22, 1981
    Assignee: Mannesmann DeMag AG
    Inventor: Dirk Rotthaus
  • Patent number: 4209681
    Abstract: A suspended pull or control switch is provided for overhead mechanical devices, such as power hoists, in which the control switch is so suspended and configured to be physiologically oriented with respect to the attendant's position that the attendant may grasp and visually consult the switch over a long period of time without becoming as fatigued as is the case with conventionally positioned switches. This is achieved by configuring the body of the switch, or at least that portion grasped, to be angled from the vertical axis of suspension of the switch to that degree necessary for the handle portion to be ergonomically work-oriented with the attendant's hand and angle of vision. A dual control switch may be utilized in which both hands of the attendant would be conformed to.
    Type: Grant
    Filed: December 11, 1978
    Date of Patent: June 24, 1980
    Assignee: DEMAG, Aktiengesellschaft
    Inventors: Gunter Somborn, Johannes Kluge, Dirk Rotthaus, Heinz Hasselmann, Uwe Lichtenvort