Cam-tightened Patents (Class 238/255)
  • Patent number: 6557775
    Abstract: A portable, folding camera dolly track is assembled from a number of folding track sections, each track section having a parallel pair of rails, each rail having a base and a cylindrical wheel-supporting rail element, and a transverse spacer. A continuous, removable, resilient cap is provided on each wheel-supporting rail element to provide a smooth ride over joints formed by adjoining rail elements.
    Type: Grant
    Filed: November 20, 2001
    Date of Patent: May 6, 2003
    Inventors: John Dillard Brinson, Gil Forrester
  • Patent number: 5687649
    Abstract: A splice plate for monorail track sections includes a mechanism for drawing the sections together and for leveling the top surfaces of the track with respect to one another. A hanger bracket which is used to attach the track to a support structure connects to the track without the use of through bolts thus eliminating the need to predrill holes in the track in order to receive such bolts. The supports themselves are commercially available hardware items and thus are less expensive than supports which are specifically designed for monorail track.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: November 18, 1997
    Assignee: HK Systems, Inc.
    Inventors: Timothy A. Koeninger, Weston R. Loomer