Abstract A working cart having a frame structure formed of rectangular members to which a pair of vertical members in parallel relation are supported, a set of four ladder-forming members in which two members thereof adjacent to said pair of vertical members are connected at their upper end by a pivot arm, and in which an articulated pivot arm is mounted near the lower end of the pair of vertical members for connecting with said two of said four members, and in which a plurality of magnetic elements are disposed in the pair of vertical members for the mating with magnetic elements in said two of said four members for holding the ladder in collapsed position. Steps are disposed between the set of four ladder-forming members to complete the structure of the ladder, and plastic caps may be disposed over the lower ends as well as some of the upper ends of the four members.
A folding ladder for a working cart comprising a frame structure forming rectangular members of said working cart, a pair of vertical members in parallel relation end-supported from the frame structure and having magnetic elements disposed thereon, a set of four ladder-forming members disposed always in parallel relation to each other in which two of said four members are adjacent to said pair of vertical members and connected thereto at the upper end by a pivot arm and near the lower end by an articulated pivot arm, said two members having magnetic elements disposed thereon formating with said magnetic elements disposed on said vertical members when in closed relation, a plurality of spatially disposed step members pivotally connected near their corners for support from adjacent portions of said four ladder-forming members, said other two members having magnetic elements disposed thereon, said two members having magnetic elements disposed thereon for mating with said magnetic elements disposed on said other two members when in closed relation.
Claim 2
Dependent Claim
164 words
A folding ladder for a working cart comprising a frame structure forming rectangular members of said working cart, a pair of vertical members in parallel relation end-supported from the frame structure and having magnetic elements disposed thereon, a set of four ladder-forming members disposed always in parallel relation to each other in which two of said four members are adjacent to said pair of vertical members and connected thereto at the upper end by a pivot arm and near the lower end by an articulated pivot arm, said two members having magnetic elements disposed thereon formating with said magnetic elements disposed on said vertical members when in closed relation, a plurality of spatially disposed step members pivotally connected near their corners for support from adjacent portions of said four ladder-forming members, said other two members having magnetic elements disposed thereon, said two members having magnetic elements disposed thereon for mating with said magnetic elements disposed on said other two members when in closed relation.
Claim 3
Dependent Claim
18 words
The invention of claim 1 wherein plastic caps are disposed over the lower ends of said four members.
Claim 4
Dependent Claim
23 words
The invention of claim 1 wherein said pair of vertical members are end supported by hook-in means for quick engaging said frame structure.
Claim 5
Dependent Claim
23 words
The invention of claim 1 wherein a bolt-and-nut means are used for end supporting said pair of vertical members onto said frame structure.