Patents by Inventor Ralph C. Jarvis

Ralph C. Jarvis 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).

  • Self-locking garage door operator
    Patent number: 4827667
    Abstract: The invention relates generally to motorized garage door operating apparatus and, more specifically, to such apparatus including mechanical locking means which automatically disengages at the onset of energization of the motorized opening/closing apparatus from the closed door condition before any opening motion of the door begins. The apparatus also operates to activate the locking means after the door is advanced to its fully closed position.
    Type: Grant
    Filed: December 4, 1987
    Date of Patent: May 9, 1989
    Inventor: Ralph C. Jarvis