Ladder apparatus and method for large mobile equipment

Details Ladder apparatus and method for large mobile equipment Ladder apparatus and method for large mobile equipment

1989-05-30

1991-11-12

Chin-Shue, Alvin C.

Fire escape, ladder, or scaffold

Wall- or floor-attached

Wall-mounted platform, with ladder

182 93, 182127, 182208, E06C 504

Patent

active

050640224

ABSTRACT:
A ladder apparatus and method for use with large construction equipment, such as large tractors, mining trucks and similar vehicles that have an operator's platform or operating station located a substantial distance off the ground. The powered ladder has a fixed ladder portion rigidly attached to such a vehicle. The fixed ladder portion has spacedly attached thereto a frame element upon which a retractable ladder element is slidably disposed. The retractable ladder element is raised and lowered by an electric winch operable from the vehicle's operating station.

REFERENCES:
patent: 303337 (1884-08-01), Stoddard
patent: 1087434 (1914-02-01), Bone
patent: 2548466 (1951-04-01), Carlsen
patent: 2860822 (1958-11-01), Smith et al.
patent: 4007847 (1977-02-01), Marco
patent: 4054182 (1977-10-01), Ide
patent: 4236601 (1986-12-01), Naka
patent: 4243120 (1981-01-01), Raft, Jr. et al.
patent: 4467889 (1984-08-01), Maubach et al.

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