Patents by Inventor Mack D. Duce

Mack D. Duce 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).

  • Adjustable restrainer for use with lap bar assemblies of amusement rides
    Patent number: 5238265
    Abstract: An adjustable restrainer for use on the cross bar of an amusement ride lap bar assembly consists of a padded roller having an axis of rotation offset maximum and minimum distances from different parts of the roller. The roller can be rotated to adjust the spacing between the roller and a seat of the ride to suit the size of the rider thereby minimizing possible injury to the rider were he otherwise to be slammed over a substantial distance into the cross bar.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: August 24, 1993
    Assignee: Duce International, Inc.
    Inventor: Mack D. Duce