发明名称 Apparatus providing single support to an extension ladder enabling ladder use on level and non-level surfaces
摘要 An apparatus attachable to an extension ladder is provided having a single leg extendable in a direction perpendicular and adjacent to the two lowest rungs of an extension ladder, a channel bar sized to receive a substantial length of a lowest rung of the ladder, and a hook for latching onto a next to lowest rung of the ladder. A foot pivotally mounted to the leg at one end thereof supports the leg onto or at least partially into a level or non-level surface. A step member extends from the leg at an angle. When the ladder is extended upwards by a user, a removable arm member is received through a holder of the leg to lie against a user's leg to provide stability and prevent spinning. The apparatus when attached to the lowest two rungs elevates the ladder to be non-contact with the level or non-level surface.
申请公布号 US9068395(B1) 申请公布日期 2015.06.30
申请号 US201113065910 申请日期 2011.04.01
申请人 发明人 Green Scott E.
分类号 E06C7/44;E06C7/42;E06C7/18 主分类号 E06C7/44
代理机构 Kenneth J. Lukacher Law Group 代理人 Kenneth J. Lukacher Law Group
主权项 1. An attachment for a ladder, the ladder having two sides and rungs, each of said rungs having a length extending between the sides of the ladder, said attachment comprising: a leg extendable perpendicular and adjacent to at least two lowest ones of said rungs of the ladder; a first member coupled to said leg, the first member having a channel disposed perpendicular to said leg, the channel configured to receive a substantial extent of the length of a lowest one of said two lowest ones of said rungs of the ladder; a second member coupled to said leg, the second member configured to receive and retain a next one above of said lowest one of said rungs when said first member receives said lowest one of said rungs in said channel; a third member separable from said leg and capable of enabling stabilization of said leg with respect to a generally stationary member; a foot pivotally mounted to one end of said leg at an axis of rotation, the foot configured to support said leg with respect to a level or non-level surface, and said leg is configured to attach to the ladder to elevate the ladder off of said level or non-level surface; a step member attached to said leg, said step member having a major top surface and positioned between said first member and said foot, said step member configured to extend away from said leg at a first angle so that pivoting said leg backwards relative to said axis of rotation pivots said step member upwards relative to said surface to enable the major top surface of said step member to be horizontal to operate as a step for use by a user climbing or descending the ladder when said ladder is coupled to the attachment, said major top surface configured to be horizontal when a major length of said ladder and a major length of said leg are substantially angled with respect to horizontal; and a holder attached to said leg, said holder having an opening into which the third member is receivable to enable said third member to extend outward and away from said leg at a second angle with respect to said leg when said channel and said second member are receiving said at least two lowest one of said rungs of the ladder.
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