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US 2006/0032708 A1Published application
Collapsible ladder
OwnerGraham Welshinventor
Life of this patent
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OwnerGraham Welshinventor
Estimating the term…
The present invention relates broadly to a collapsible ladder (10) comprising a pair of opposing rails (12A) and (12B) interconnected with a plurality of rails (14A) to (14J). The collapsible ladder (10) can be moved or manipulated from a collapsed condition to an operative condition. In the collapsed condition the opposing pair of rails are (12A/B) locate adjacent or abut one another whereas in the operative position the rails (12A/B) are laterally spaced with the interconnecting rungs (14A) to (14J) being disposed substantially perpendicular thereto. Each of the rungs such as (14A) is at its opposing ends pivotally connected to respective of the opposing pair of rails (12A/B). This pivotal connection between the rungs such as (14A) and rails (12A/B) allows the ladder (10) to move from its operational to collapsed conditions.
A collapsible ladder comprising:
A collapsible ladder as defined in any one of the preceding claims wherein the collapsible ladder at and adjacent its upper end is free of the ladder rungs for a height substantially greater than shoulder height of a person and providing unobstructed access between the pair of rails.
A collapsible ladder as defined in any one of the preceding claims further comprising anchoring means connected to one or both of the pair of rails and being adapted to permanently or temporarily mount the ladder to a structure.
A collapsible ladder as defined in any one of the preceding claims wherein the pivotal connection between the rungs and the rails is provided by a pivot pin coupled to the rail and each of the rungs.
A collapsible ladder as defined in any one of the preceding claims wherein the pair of rails are each fabricated of channel-section members having their respective flanges aligned with and directed toward one another, the rungs being configured to nest within the channel-section rails with the ladder in the collapsed condition.
A collapsible ladder as defined in any one of the preceding claims additionally comprising at least one handle connected to one of the rails and positioned such that the ladder in its collapsed condition is evenly weighted about said handle.
A collapsible ladder as defined in any one of the preceding claims wherein the collapsible ladder is fabricated from roll-formed steel.
Dependencies are inferred from the claim text.