Fire escape – ladder – or scaffold – Convertible – Ladder
Patent
1979-05-29
1981-07-07
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Convertible
Ladder
182129, 269244, A47C 1300, B25B 110
Patent
active
042769558
ABSTRACT:
In the illustrative embodiments disclosed, a folding portable multiple-purpose work unit is interchangeably useable in three main work modes: as a stepladder, as a step stool, and as a small workbench having a vise. The substructure of the unit includes front and rear leg frames, the front frame having two steps, and is foldable to allow ready storage of the unit. The vise unit forms the top of the substructure. A seat member covers the vise unit when the work unit is in the step stool and stepladder modes and pivots to uncover the vise unit in the workbench mode. When so pivoted off the vise unit, the seat member forms a tool tray which also blocks use of the work unit as a stool or ladder while the seat is not in place. The work unit also includes a handrail which is movable between a raised position in the stepladder mode, where it affords support to a user standing on the steps or seat of the unit, and a lowered position in the workbench or step stool mode, where it is out of the user's way and also facilitates storage of the unit. The substructure of the work unit is latched in the erect position by a pair of hooks carried by a latching rod, the hooks engaging with abutment surfaces on abutment blocks connected to the upper ends of the legs of the substructure. The latching rod carries a release member in its central region which, when the seat is in position, can be rotated and lifted to cause release of the latching mechanism and automatic folding of the substructure.
REFERENCES:
patent: D236244 (1975-08-01), Lay
patent: 850351 (1907-04-01), Crum
patent: 1635183 (1927-07-01), Jeannotte
patent: 2952301 (1960-09-01), Schlaak
patent: 3011585 (1961-12-01), Hamilton
patent: 3016974 (1962-01-01), Hamilton
patent: 3042139 (1962-07-01), Hamilton
patent: 3227243 (1966-01-01), Bates
Prestige Kitchen Stools (2 pp.) "Brochures".
Black & Decker, Workmate 500 (2 pp.). "Brochures".
AEG Elektrowerkzeuge (6 pp.) "Brochures".
Abru Steps & Ladders (2 pp.) "Brochures".
Machado Reinaldo P.
Tekron Licensing B.V.
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