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US 6,769,515 B2Granted
Multi-fold collapsible ladder
AssigneeCosco Management, Inc.
InventorsLuke Hillebrecht, Paul K. Meeker, William R. Gibson
Life of this patent
Estimating the term…
Abstract
A ladder includes a frame and a plurality of folding steps. The ladder includes a step mover coupled to the steps to allow pivotable movement of the step sections relative to the left and right legs as the ladder is moved between opened and closed positions.
Claims17
A ladder comprising
- a frame including a left leg and a right leg,
- a plurality of steps arranged to lie between the left and right legs, each step including a left step section pivotably coupled to the left leg, a right step section pivotably coupled to the right leg, and a slider hinge pivotably coupled to each of the left and right step sections to support the left and right step sections for relative movement to one another about a step pivot axis between an aligned position wherein the left and right step sections are arranged to lie in end-to-end relation to one another upon movement of the left and right legs to an opened position in which the left leg is arranged to lie in non-parallel relation to the right leg and a folded position wherein the left and right step sections are arranged to lie in side-by-side relation to one another upon movement of the left and right legs to a closed position in which the left leg is arranged to lie in parallel relation to the right leg, and
- a step mover including a rod and a first post on the rod, wherein the rod is slidably coupled to at least one of the slider hinges for movement relative to the left and right legs between a lowered position associated with the opened position of left and right legs and a raised position associated with the closed position of the left and right legs and wherein the first post is arranged on the rod lie under and mate with a first of the slider hinges included in a first of the steps upon movement of the left and right legs to the opened position and to lie under and in spaced-apart relation to the first of the slider hinges upon movement of the left and right legs to the closed position.
A ladder comprising
- a frame including a left leg and a right leg,
- a plurality of steps arranged to lie between the left and right legs, each step including a left step section pivotably coupled to the left leg, a right step section pivotably coupled to the right leg, and a slider hinge pivotably coupled to each of the left and right step sections to support the left and right step sections for relative movement to one another about a step pivot axis between an aligned position wherein the left and right step sections are arranged to lie in end-to-end relation to one another upon movement of the left and right legs to an opened position in which the left leg is arranged to lie in non-parallel relation to the right leg and a folded position wherein the left and right step sections are arranged to lie in side-by-side relation to one another upon movement of the left and right legs to a closed position in which the left leg is arranged to lie in parallel relation to the right leg, each slide hinge formed to include a slot, and
- a step mover including a rod arranged to extend through the slot formed in each slider hinge, a series of posts coupled to the rod and arranged to lie in equidistantly spaced-apart relation to one another along the length of the rod, and each post is lies under and mates with a companion one of the slider hinges upon movement of the left and right legs to the opened position and separates from the companion one of the slider hinges upon movement of the left and right legs to the closed position.
Dependencies are inferred from the claim text.