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US 4,147,231 AGranted
Ladder stabilizing device
OwnerDouglas A. Chantler, Ross W. Colemaninventors
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OwnerDouglas A. Chantler, Ross W. Colemaninventors
Estimating the term…
A stablizing device to be connected on the outer sides of the side pieces of a ladder has a lower leg pivoted on a lower part of the side piece and pivoted at its upper end to an upper leg part which has a locking member for releasable locking on the side piece. By adjustment of the upper leg part, the leg parts can be braced against the ground or against a vertical wall surface. This device leaves the rungs of the ladder unobstructed and the upper leg part may be freely slidingly connected on the side piece so that the knees can readily be adjusted independently to allow the ladder to be stabilized on uneven ground. There is disclosed an arrangement in which a lever on the upper leg part engages a toothed rack on the side piece and lifts the ladder bodily upwards a small distance as the lever is pressed inward to the side of the ladder. This lifting action transfers the weight of the ladder from the foot of the ladder to the outlying feet of the upper leg parts so that a wide and stable supporting base is provided.
Stabilizing means for connection on the outer side of each side piece of a ladder comprising a lower leg part adapted to be pivotally connected on the side piece, an upper leg part pivotally connected to the lower leg part, a reaction member for connection on the side piece above the lower leg part, rotatable means connected to the upper leg part and having an axis of rotation, said rotatable means rotating in engagement with the reaction member to shift the reaction member upwardly relative to the axis of rotation and the upper leg part, and releasable retaining means for retaining the rotatable means in fixed position relative to the reaction member.
Stabilizing means for connection on the outer side of each side piece of a ladder comprising a lower leg part adapted to be pivotally connected on the side piece, an upper leg part pivotally connected to the lower leg part, a reaction member for connection on the side piece above the lower leg part, lever means pivotally connected to the upper leg part and moving in engagement with the reaction member to shift the reaction member upwardly relative to the lever means and upper leg part, and releasable retaining means for retaining the lever means in fixed position relative to the reaction member.
Dependencies are inferred from the claim text.