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  • Patent number: 5549342
    Abstract: A manhole debris catcher having a flat mat with open tubular pockets spaced radially about a center point at approximate equal angle, with a center support base and straps threaded through the pockets and through openings through the center support base, and a ring lifting assembly attached via lines to the ends of each of the straps; side braces may be inserted into each of the pockets to assist in maintaining the mat in flat form.
    Type: Grant
    Filed: February 2, 1995
    Date of Patent: August 27, 1996
    Assignee: Virtual Industries, Inc.
    Inventors: Jeffrey E. Donaldson, Andrew J. Sullivan