Multipurpose ladder
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United States of America Patent
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-
Oct 13, 1987
Grant Date -
N/A
app pub date -
Oct 2, 1986
filing date -
Oct 29, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention discloses a multipurpose ladder, and comprises four section-ladders; four pivot joint device provided between section-ladders, respectively, for connection but at least one pivot joint device being separable. Said pivot joint devices are available for bending or folding. So that, the multipurpose ladder can be change into a climbing ladder, horse ladder, frame ladder and right-angled ladder.
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Cited Art Landscape
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