Extension ladders
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United States of America Patent
Stats
-
Sep 16, 1980
Grant Date -
N/A
app pub date -
May 14, 1979
filing date -
May 14, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The fly sections of extension ladders are provided at the bottom end with opposed housing bars upon which a rung is mounted thereby avoiding the usual hazard of a skipped rung. The housing bars are constructed and mounted on the fly section to provide multi-directional strength while permitting full movement, in the space between the mounting bar and the ladder side rail, of automatic hook locks equipped with conventional toggles. The improved constructions are especially suited to the manufacture of all-metal ladders.
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