Patents by Inventor David W. Miedema

David W. Miedema 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: 7473858
    Abstract: A movement detecting device detects movement, or tilt, of a building facilities component, and controls a desired event through an electrical signal without using mercury. The device includes a first housing section and a second housing section held together by a fastener. A ball is disposed between the first and second housing sections within a cavity. A mechanical switch is disposed between the first and second housing sections so that the switch extends into the cavity for contact with the ball when movement of the device exceeds a predetermined angle. A damper arm is included for securing the device to a facilities component to be monitored as desired.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: January 6, 2009
    Assignee: Mercury Displacement Industries, Inc.
    Inventors: Walter E. Berndt, David W. Miedema