Fire escape – ladder – or scaffold – Ladder with pivoted prop
Patent
1992-06-30
1994-02-22
Johnson, Blair M.
Fire escape, ladder, or scaffold
Ladder with pivoted prop
182175, 403315, 403330, E06C 100
Patent
active
052879461
ABSTRACT:
A child's portable climbing apparatus is disclosed, having first and second climbing members. The first and second climbing members each have spaced, opposing parallel support beams and spaced, horizontal climbing bars secured to the opposing parallel support beams. The first and second climbing members are pivotally joined by a top horizontal climbing bar secured to the beams at a location offset from the longitudinal centerline, to enable the first and second climbing members to be folded into parallel alignment for ease of transportation and storage. At least one safety bar is removably secured between a selected climbing bar on the first climbing member, and a selected climbing bar on the second climbing member to adjustably position and releasably secure the climbing apparatus in a variety of heights and angular climbing positions. A safety catch is preferably used to secure the safety bar during use. A pawl may be positioned to pivot upwardly to allow the selected horizontal climbing bar to enter a slot in the safety bar. Once the climbing bar is positioned in the slot, the pawl pivots to restrict removal of the climbing bar from the slot. To remove the safety bar from the slot, the pawl must be manually raised. Two opposing pawls may be used on each side of the slot.
REFERENCES:
patent: 93551 (1869-08-01), Oakley
patent: 1059780 (1913-04-01), Starke
patent: 1599083 (1926-09-01), Gagne
patent: 1605506 (1926-11-01), Brunhoff
patent: 1837388 (1931-12-01), Wood
patent: 2350129 (1944-05-01), Richards
patent: 2470706 (1949-05-01), Larson
patent: 2589079 (1952-03-01), Heaivilin
patent: 4544324 (1985-10-01), Hornung
Flagg Rodger H.
Johnson Blair M.
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