Ladder lift apparatus

Details Ladder lift apparatus Ladder lift apparatus

1987-12-07

1988-09-13

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Combined

182102, 187 2, 187 11, E06C 712

Patent

active

047702737

ABSTRACT:
A lifting apparatus usable to lift heavy loads from the ground to a roof surface including a horizontally positioned, shoulder mounted lifting bar or beam with a winch means, fastened to the bar or beam where one end of the lifting bar or beam is pivotally connected to a vertically positioned ladder or extension ladder, with means to allow pivotal rotation of the upper end of the ladder toward the roof to deposit the load on the roof or into a window of a multi-story building.

REFERENCES:
patent: 731708 (1903-06-01), Quinn
patent: 738164 (1903-09-01), Cody
patent: 921431 (1909-05-01), Miller
patent: 1620254 (1927-03-01), Gauss
patent: 2118585 (1938-05-01), Alber
patent: 3074508 (1963-01-01), Book
patent: 3902700 (1975-09-01), Cox
patent: 3964573 (1976-06-01), Wilson
patent: 4128228 (1978-12-01), Ziegelmann
patent: 4690248 (1987-09-01), Killen

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