Patents by Inventor Richard P. Spens

Richard P. Spens 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).

  • Garage door operator
    Patent number: 5588257
    Abstract: A door operator for garage doors is provided which includes a motor, a multiple segmented drive screw and a traveler coupled to and reciprocating along the multiple segmented drive screw. The drive screw segments have non-circular ends which are slidably coupled to each other through a complementary sleeve. Springs are used to bias the screw segments toward one another. The traveler includes a lubricating pad for lubricating the drive screw as it passes along.
    Type: Grant
    Filed: August 24, 1994
    Date of Patent: December 31, 1996
    Assignee: The Stanley Works
    Inventors: Dean C. Duhame, Richard P. Spens, Dana Lowell, Chin-Feng Chan, Ming-Hwa Shou