Fire escape – ladder – or scaffold – Self-sustaining
Patent
1996-04-18
1997-02-25
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Self-sustaining
403 49, 403246, E04G 700
Patent
active
056052049
ABSTRACT:
Scaffolding includes standards to which ledger or tie tubes and diagonal braces are attached to form a removable three-dimensional truss. The ledger tubes and the braces are attached to the standards by fastening them at bores in discs fixed at regular intervals on the standards. The fastening is performed by hooks belonging in parts attached at the ends of the elements and is assisted by wedge keys.
REFERENCES:
patent: 3817641 (1974-06-01), Steele
patent: 4273463 (1981-06-01), Dobersh
patent: 4867274 (1989-09-01), Langer
patent: 5207527 (1993-05-01), Duncan et al.
Chin-Shue Alvin C.
Ulma, S. Coop. Ltda
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