The 3 in 1 ladder, dolly, and seating system is a portable, device that can function as a set of stairs, a ladder, a seating area, and a cargo dolly. It is a four wheeled dolly, or a two-handle hand truck with two wheels in front, and can extend to become a ladder or various types of stairs, includi
The 3 in 1 ladder, dolly, and seating system is a portable, device that can function as a set of stairs, a ladder, a seating area, and a cargo dolly. It is a four wheeled dolly, or a two-handle hand truck with two wheels in front, and can extend to become a ladder or various types of stairs, including steps for sitting. It is constructed from durable aluminum, or another appropriate material. The device can convert into a set of stairs with removable guardrails, or a smaller set of stairs that can be used as seating with foldable backrests. It can be manufactured with an umbrella holder and an optional canopy tent.
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1. A 3 in 1 ladder, dolly, and seating assembly comprising: an upper frame including a rectangular upper frame section, anda rectangular lower frame section,wherein said upper frame section and said lower frame section are pivotably connected at adjacent ends and foldable upon each other;said upper
1. A 3 in 1 ladder, dolly, and seating assembly comprising: an upper frame including a rectangular upper frame section, anda rectangular lower frame section,wherein said upper frame section and said lower frame section are pivotably connected at adjacent ends and foldable upon each other;said upper frame section includes at least two rotatable steps connected thereto, and a back panel;said lower frame section includes at least two rotatable steps connected thereto and is pivotally and slidably connected to a lower frame;said lower frame having a rectangular shape and including two parallel exterior tracks located on each opposite exterior side that extend the length of said lower frame, andtwo parallel interior tracks located on each opposite interior side that extend the length of said lower frame;a wheel frame that has a rectangular shape and including two parallel exterior tracks located on each opposite exterior side that extend the length of said wheel frame, andwherein said wheel frame is pivotally and slidably connected to said lower frame via a plurality of sliding connectors connected between said interior tracks of said lower frame and said exterior tracks of said wheel frame, anda plurality of removable wheels connected to said wheel frame,wherein said wheel frame is adapted to be slid within said lower frame when in a storage position, and then slid outwardly and pivoted 90 degrees and secured as such when in a dolly configuration;a plurality of handle members attached to an end portion of said lower frame in between said two opposite exterior sides of said lower frame, wherein said handle members are used to pivot and move said assembly when in a dolly configuration;a first set of support members adapted to be used to support said upper frame in a deployed position when said assembly is in a ladder configuration, said first set of support members are pivotally connected to end portions of respective sides of said lower frame section adjacent said upper frame section via a sliding connector connected therebetween, and pivotally and slidably connected to respective said opposite exterior tracks of said lower frame via a sliding connector connected therebetween;and a second set of support members adapted to be removably connected to ends of respective sides of said upper frame section opposite the end that is adjacent to said lower frame section via a sliding connector connected therebetween, and are pivotally and slidably connected to respective said opposite exterior tracks of said lower frame via a sliding connector connected therebetween. 2. The 3 in 1 ladder, dolly, and seating assembly of claim 1 wherein said sliding connectors are formed as cylindrical pins having enlarged circular portions on both ends thereof adapted to fit and move linearly within said tracks of said lower frame, and said wheel frame. 3. The 3 in 1 ladder, dolly, and seating assembly of claim 1 wherein spring pins are used to removably secure said support members to said upper frame and said lower frame, and said wheel frame to said lower frame.
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이 특허에 인용된 특허 (9)
Mason John E. (Owatonna MN) Clausen Herman A. (Blooming Prairie MN) Lurken Gary J. (Ellendale MN) Sellner Dale A. (Owatonna MN), Adjustable stairway having retractable wheel carriage.
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