TELESCOPICALLY COLLAPSIBLE FIRE ESCAPE LADDER
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United States of America Patent
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N/A
Issued Date -
Jun 18, 2015
app pub date -
Jul 11, 2013
filing date -
Jul 25, 2012
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A ladder for use as a fire escape has two stiles comprising telescopically collapsible tube sections, a plurality of rungs each secured to the upper end of two tube sections, each of the two sections being part of a respective one of the two stiles, and retractable spring-biased pins supported by the lateral ends of the rungs and engageable in holes in the walls of the tube sections to lock the tube sections to one another in the extended state of the ladder. The ladder is capable of being suspended from the uppermost tube sections of the stiles and the holes in the walls of the tube sections in which the sprung pins are engageable are dimensioned to allow free play between the pins and the holes in at least the axial direction of the tubes.
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