Patents by Inventor David L. Rosbrook

David L. Rosbrook 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).

  • Fastener tension control system
    Patent number: 4244245
    Abstract: A method and apparatus for controlling final tension on a fastener being run up and set. An efficiency factor is developed and utilized for attaining predetermined final tension on a fastener, or a group of similar fasteners, being operated upon. The efficiency factor is a ratio between work on a theoretical fastener, i.e., one wherein friction load is absent in work calculations, and work on an actual fastener. Having obtained the efficiency factor, the actual torque load on a fastener to attain predetermined tension value, can be established by use of the efficiency factor.
    Type: Grant
    Filed: May 16, 1979
    Date of Patent: January 13, 1981
    Assignee: Chicago Pneumatic Tool Company
    Inventors: William K. Wallace, David L. Rosbrook