Adjustable platform for supporting ladders

Details Adjustable platform for supporting ladders Adjustable platform for supporting ladders

1996-11-18

1998-08-11

Chin-Shue, Alvin C.

Fire escape, ladder, or scaffold

Ladder

Supporting surface compensating means

182 45, E06C 744

Patent

active

057914389

ABSTRACT:
Abstract An improved ladder supporting device having two similar rectangular plates, hinged together at one end of each plate. One plate can be raised to an angular configuration with the other plate and sustained by a pair of support racks. The support racks are pivotal upon the base plate edges and are slotted and notched so that the load-bearing plate can rest in any of a plurality of angular configurations. The angular resting position of the load bearing plate is secured by a pair of locking wing nuts. In this configuration, the device can compensate for the sloping condition of the footing surface and support the combined weight of the ladder, the worker, and his or her working tools. By spreading the total weight over an enlarged area, the device can be used over a variety of unstable sloped ground conditions. In like manner, this device can be used, in its collapsed configuration, over level unstable ground surface conditions.

REFERENCES:
patent: 4342374 (1982-08-01), Montana
patent: 4699247 (1987-10-01), Clarke
patent: 4852689 (1989-08-01), Erion
patent: 5078231 (1992-01-01), Davis
patent: 5222575 (1993-06-01), Santos
patent: 5307900 (1994-05-01), Noga
patent: 5464071 (1995-11-01), Rice
patent: 5507364 (1996-04-01), Spevak
patent: 5584535 (1996-12-01), Jacobson
patent: 5615752 (1997-04-01), Wassil

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