Jointed ladder

Details Jointed ladder Jointed ladder

1989-11-09

1991-12-24

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Ladder with pivoted prop

Section extensible below prop pivot

182209, E06C 130, E06C 138, E06C 708

Patent

active

050743775

ABSTRACT:
The invention relates to a jointed ladder comprising two ladder elements connected by a joint. According to the invention a telescopic ladder element is supported movably on each ladder element and can be locked by means of a locking mechanism in order to be able to adjust the jointed ladder to different operating heights. The jointed ladder of the invention can be utilized for all purposes.

REFERENCES:
patent: 745320 (1903-12-01), Bruno
patent: 858839 (1907-07-01), Upton
patent: 2350129 (1944-05-01), Richards
patent: 3692143 (1972-09-01), Kummerlin
patent: 4182431 (1980-01-01), Wing
patent: 4210224 (1980-07-01), Kummerlin
patent: 4376470 (1983-03-01), Ashton
patent: 4407045 (1983-10-01), Boothe
patent: 4606432 (1986-08-01), Belt

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