Static structures (e.g. – buildings) – Openwork; e.g. – truss – trellis – grille – screen – frame – or... – Superimposed three-dimensional units
Patent
1989-01-12
1990-01-09
Machado, Reinaldo P.
Static structures (e.g., buildings)
Openwork; e.g., truss, trellis, grille, screen, frame, or...
Superimposed three-dimensional units
52696, 182178, E04G 114
Patent
active
048919268
ABSTRACT:
An improved walk-through scaffolding frame is constructed of components which may be assembled together to form an erected frame and disassembled to pass through a narrow opening such as a manhole or some other narrow access opening to a larger enclosure. The improved walk-through scaffolding is constructed with a pair of generally triangular-shaped upright support members and a connecting crosspiece. The upright support members each define a single downwardly directed tubular leg as well as upwardly extending inner and outer support posts. The crosspiece includes downwardly directed connectors which telescopically engage both the inner and outer support posts of each of the pair of upright support members and an upwardly directed connector at its outer extremity for engaging a downwardly directed leg of another walk-through frame located thereabove. The upright support members and the crosspiece may be quickly and easily disassembled without tools to pass through very narrow manhole-type openings and reassembled without tools to erect scaffolding.
REFERENCES:
patent: 2316952 (1943-04-01), Halferty
patent: 2481885 (1949-09-01), Simpson
patent: 2569653 (1951-10-01), Boedecker
patent: 3245188 (1966-04-01), Evans
patent: 3508666 (1970-04-01), Schwengel
patent: 3527320 (1970-09-01), Cunningham
patent: 3752262 (1973-08-01), Helms
patent: 4430839 (1984-02-01), Butters
Machado Reinaldo P.
Thomas Charles H.
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