Lifting device for use with a ladder

Details Lifting device for use with a ladder Lifting device for use with a ladder

1997-12-24

1999-06-15

Chin-Shue, Alvin

Fire escape, ladder, or scaffold

Ladder with vertically moving platform or escape

Ladder supports platform

182214, 182241, E04G 108

Patent

active

059112875

ABSTRACT:
A lifting device for raising a load intended for support by a roof of a building utilizing a ladder. Device includes a sled having first portion for slidingly contacting the ladder and a second portion providing a platform for a load. The sled is movable along the ladder generally in an up and down direction. A brace member connects to the ladder end, adjacent the roof. The brace possesses a flange which contacts the roof. An arm rotatably connects to the brace. The brace arm includes a first support surface for the sled when the arm is rotated toward the roof and a second support surface for contacting the roof. The sled is motivated along the ladder by motivating mechanism such as a crank operated cable.

REFERENCES:
patent: 156541 (1874-11-01), Conrad
patent: 319119 (1885-06-01), Pentz
patent: 2526071 (1950-10-01), Estey
patent: 3666054 (1972-05-01), Ellings et al.
patent: 4183423 (1980-01-01), Lewis
patent: 4491196 (1985-01-01), Bockey
patent: 4546853 (1985-10-01), Hanson
patent: 5275256 (1994-01-01), Ellzey
patent: 5743356 (1998-04-01), Mitchell

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