Fire escape – ladder – or scaffold – Traversing – track-mounted – With vertically spaced second track
Patent
1994-12-13
1996-01-02
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Traversing, track-mounted
With vertically spaced second track
182 39, 182115, E06C 700
Patent
active
054800021
ABSTRACT:
The ladder system is located adjacent the front face of a storage rack. The ladder is carried by a cantilever supported carriage assembly. The ladder may move longitudinally along the front face of the storage rack and may also be moved laterally in a direction extending perpendicular to the front face of the storage rack. The carriage assembly includes a horizontal ladder support track upon which the ladder is mounted by means of two sets of rollers. With such a construction, the ladder may pivot about the support track to avoid obstructions in the aisle or projecting from the storage rack. In this way, a user can quickly and easily position the ladder at any position along the storage rack for accessing items stored on the shelves. This ladder system is particularly useful in crowded warehouse-type retail outlets which are now in popular use across the United States of America.
REFERENCES:
patent: 356375 (1887-01-01), Perkins
patent: 470374 (1892-03-01), Fisher
patent: 528824 (1894-11-01), Sumner
patent: 862622 (1907-08-01), Eller
patent: 907401 (1908-11-01), Prouty
patent: 938016 (1909-10-01), Niblaek
patent: 1320740 (1919-11-01), Coghlin
patent: 1341996 (1920-06-01), Plucienski
patent: 3735838 (1973-05-01), Greenleaf
patent: 5148889 (1992-09-01), Fenwick et al.
Storage Wall System (Lista), Catalog Sw-255.
Rolling Wood Ladders (Cotterman), Bulletin WL-188.
Chin-Shue Alvin C.
Kerr James F.
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