EXTENDABLE / RETRACTABLE LADDER

Number of patents in Portfolio can not be more than 2000

United States of America Patent

SERIAL NO

13533430

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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An extendable/retractable ladder assembly includes a first stile and a second stile and a plurality of rungs extending therebetween. Each stile may comprise a plurality of columns disposed in a nested arrangement for relative axial movement in a telescopic fashion. A connector assembly connects the rungs to respective columns in the first and second stiles. The ladder has improved manufacturability since connector assemblies may be assembled before connecting the rungs to respective columns. The standing surface of the rungs may be angled such that it is rotated towards horizontal when the ladder assembly is leaned against a wall. A latch assembly may be used to selectively lock relative axial movement between adjacent columns. The latch assembly includes a locking pin assembly comprised of a central post and an outer metal sleeve. An air damper may also be used to control airflow through the columns.

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Patent Owner(s)

Patent OwnerAddress
CORE DISTRIBUTION INC113 WASHINGTON AVENUE NORTH MINNEAPOLIS MN 55401

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Caldwell, Allen A Shakopee, US 10 27
Decker, Matthew J St. Paul, US 11 126
Kieffer, Mitchell I Minneapolis, US 19 65
Schlueter, Nathan L Bloomington, US 11 30

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