Ladder ridge hook and stand off

Details Ladder ridge hook and stand off Ladder ridge hook and stand off

1989-10-17

1990-07-03

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Ladder

With hook or grab

182209, 182214, E06C 706, E06C 748

Patent

active

049383124

ABSTRACT:
A device which may serve as a ridge hook for hooking a ladder unto a ridge of a roof includes two wheels mounted upon arms. A threaded rod extends through the hollow core of a ladder rung to secure the device to a ladder. An unhooking arrangement uses a pivot arm, normally biased to be parallel to the ladder, to lift an upper end of the ladder free of the ridge when a control line is pulled. A ladder rung lock is used to prevent relative movement between the upper and lower sections of an extension ladder.

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patent: 1233717 (1917-07-01), Shinn
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patent: 4311207 (1982-01-01), Lurry
patent: 4397375 (1983-08-01), Hart
patent: 4458783 (1984-07-01), Stakes
patent: 4531612 (1985-07-01), Sandor
patent: 4787478 (1988-11-01), Stakes

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