Patents by Inventor Hendrik F. W. van Roy

Hendrik F. W. van Roy 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: 5909093
    Abstract: A remotely controlled blind arrangement comprises a head rail with an operating member for operation the blind arrangement. The blind arrangement can be controlled by means of a remote control device and is powered by a power supply such as for instance a battery. According to the invention the blind arrangement comprises a wake-up circuit for periodically switching the processor unit between an active status and a sleep status. The processor unit periodically calibrates the wake-up unit to maintain a constant period wake-up signal. Hereby the wake-up circuit can be made from relatively cheap components and drifts of the wake-up signal due to the decreasing battery power or temperature influences can be reduced. In an embodiment according to the present invention the processor unit is adapted to disregard the signal of the transmitter when the blind has a fully tilted, fully deployed or fully retracted position for further energy saving.
    Type: Grant
    Filed: November 13, 1997
    Date of Patent: June 1, 1999
    Assignee: Hunter Douglas International N.V.
    Inventors: Ad P. M. van Dinteren, Hendrik F. W. van Roy