Patents by Inventor Kevin R. MacDonald

Kevin R. MacDonald 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).

  • Patent number: 5409195
    Abstract: A safety cable restraint system for easy attachment to the rail of a railroad track crossing a bridge including a restraint cable anchored at each end to a leg clampable to the rail so as to hold the cable ends outboard of the rail and a plurality of intermediate cable supports secured to legs clampable to the rail for holding the restraint cable above and outboard of the rail. The legs are preferably adjustably clamped to the rail to accommodate rails of different sizes and the legs are adjustably spaced to accommodate different sizes and spacings of rail ties.
    Type: Grant
    Filed: January 7, 1993
    Date of Patent: April 25, 1995
    Assignee: Smmart Equipment Inc.
    Inventors: Michael R. Strickland, Kevin R. MacDonald, Joseph L. To
  • Patent number: 5325788
    Abstract: A safety trolley restraint system for easy attachment to the rail of a railroad track crossing a bridge includes a trolley carriage with opposed rollers clampable to the rail so as to hold the trolley on the rail while permitting rolling movement of the trolley on the rail and provides a movable attachment point for the end of a safety line of a personnel safety harness. The carriage includes two halves pivoted together which may be opened to remove the trolley from the rail and closed and locked to secure the trolley to the rail. The trolley restraint attachment point is preferably swingable from side to side with respect to the rail and includes a swiveling mounted attachment eye for the personnel safety line.
    Type: Grant
    Filed: January 7, 1993
    Date of Patent: July 5, 1994
    Assignee: Smmart Equipment Inc.
    Inventors: Michael R. Strickland, Kevin R. MacDonald