Fire escape – ladder – or scaffold – Self-sustaining – Scaffold horse
Reexamination Certificate
2005-05-24
2005-05-24
Chin-Shue, Alvin (Department: 3634)
Fire escape, ladder, or scaffold
Self-sustaining
Scaffold horse
C182S186300
Reexamination Certificate
active
06896102
ABSTRACT:
An apparatus used in the assembly and structure of tables, benches, sawhorses, and scaffolds. In particular, the invention discloses a U-beam top joint with lumber end gripper used with a U-beam splay bar, which are used in pairs or greater multiples to hold pieces of lumber in the required position to form a structure. The combination can be readily transported to a recreation or construction site and used to assemble a picnic table, bench, sawhorse with lumber fence, bench, scaffold or like structure with available lumber, cut to form the desired height for the structure. The U-beam top joint with lumber end gripper and the U-beam splay bar interact with the lumber legs and cross-beam such that an increase in load on the cross-beam causes a proportional increase in the rigidity and stability of the structure. The U-beam top joint and the U-beam splay bar each have side lumber brackets by which multiple top joints and splay bars can be linked to each other.
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Bull, Housser & Tupper
Chin-Shue Alvin
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