초록 ▼

A foldable scaffold is disclosed, including a frame and a person-supporting plank. The frame comprises two upwardly-extending end ladders. A backwardly-located truss pivotally joins the ladders together and includes a hinge at the intermediate portion thereof for pivotal forward movement of the latt

A foldable scaffold is disclosed, including a frame and a person-supporting plank. The frame comprises two upwardly-extending end ladders. A backwardly-located truss pivotally joins the ladders together and includes a hinge at the intermediate portion thereof for pivotal forward movement of the latter from a fully-extended truss position to a folded truss position. The latter movement produces relative lateral movement of the ladders from spaced-apart positions, one toward the other, to near-abutting positions. The frame also includes a hinge to releasably immobilize the hinge and maintain the truss in fully-extended position. The person-supporting plank is removably fixed to and extends between the ladders when the truss in its fully-extended position.

대표청구항 ▼

A foldable scaffold comprising two end ladders, each including a fore and an aft leg and a number of step rods extending between said fore and aft legs, a truss pivotally connected to said aft ladder legs at an intermediate portion of the latter, said truss being made of two sections and including h

A foldable scaffold comprising two end ladders, each including a fore and an aft leg and a number of step rods extending between said fore and aft legs, a truss pivotally connected to said aft ladder legs at an intermediate portion of the latter, said truss being made of two sections and including hinge means interconnecting said sections for pivotal forward movement of said truss sections for a fully-extended truss position in which said sections are in end-to-end alignment to a folded truss position, said forward movement of said truss sections producing relative lateral movement of said end ladders from spaced-apart positions one toward the other to contiguous positions, and hinge means locking means to releasably fixedly imomobilize said truss sections in said fully-extended truss position, each truss section consisting of a rigid rectangular member comprising upper and lower horizontal parts interconnected by a vertical outer sleeve and a vertical inner rod, said sleeve rotatably surrounding said aft leg between two step rods of one said ladder, and said hinge means consisting of a double tube rotatably surrounding the adjacent vertical inner rods of the two rectangular members.