Patents by Inventor Fred Sinnig

Fred Sinnig 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: 4773870
    Abstract: A pull-out frame has drivers which are movably guided in a straight line at side walls, with a working surface which interacts with a working surface of a lifting lever which likewise is supported tiltably at the side walls. Interacting hook-like end parts of the driver and the lifting lever block, in the rest condition, tilting of the lifting lever. If required, end faces of the end parts of the driver and of the lifting lever meet each other in order to exert an additional restoring force on the lifting lever.
    Type: Grant
    Filed: December 4, 1986
    Date of Patent: September 27, 1988
    Assignee: Siemens Aktiengesellschaft
    Inventor: Fred Sinnig
  • Patent number: 4768131
    Abstract: A pull-out frame for electric switchgear is provided in the vicinity of its side walls with bolts which serve as pivots or stops of guide rails which can be retrofitted. The guide rails are provided with a keyhole-like opening, the narrower part of which correspond to the diameter of a bolt and the wider part of which correspond to the diameter of the collar of the bolt. The connection of the guide rails to the side walls can be made by shifting the guide rails in the direction of the force of gravity and can be released in the reverse direction. For securing each guide rail in its upright rest position, a latch which extends beyond one leg of the guide rail in fork-fashion is provided which can likewise be retrofitted at the corresponding side wall.
    Type: Grant
    Filed: December 4, 1986
    Date of Patent: August 30, 1988
    Assignee: Siemens Aktiengesellschaft
    Inventors: Rosemarie Schultz, Fred Sinnig