Manhole ladder
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United States of America Patent
Stats
-
Jan 11, 1994
Grant Date -
N/A
app pub date -
Mar 2, 1993
filing date -
Mar 2, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A non-metallic ladder for use in a manhole in which permanent manhole steps have been installed and spaced relation from the top of the manhole to a position above the bottom and there being a pair of spaced side members on said ladder connected transversely by spaced steps to form corners at the top in which there are spaces to fit over a respective side members on the step. The spaces may be in the shape of a rectangular cross-section or other configuration. The ladder is 'hung' from the step to resist dislodgment therefrom. There may be provided a wall bumper member at the bottom of the ladder to engage the inside wall of the manhole.
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Family
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Cited Art Landscape
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