Trench box
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United States of America Patent
Stats
-
Apr 21, 1987
Grant Date -
N/A
app pub date -
Apr 24, 1986
filing date -
Apr 24, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A trench box of the kind comprising spaced, parallel side walls held in spaced, parallel relation by end plates characterized in that the side walls are comprised of relatively light gauge sheet metal, reinforced at the opposed sides by sheet metal ribs and braces such as to prevent buckling of the side walls.
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