Ladder hinge and stabilizer therefor

Details Ladder hinge and stabilizer therefor Ladder hinge and stabilizer therefor

1977-09-29

1979-05-08

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Wall- or floor-attached

Ladder

182115, 182129, 280166, E06C 506, E06C 524

Patent

active

041531388

ABSTRACT:
A fold-up ladder is provided for a combine which pivotally connects at its upper end to a deck adjacent an operator's cab at the forward end of the combine. The axis of the pivot connection at the upper end of the ladder substantially coincides with the edge of the deck and the edge of the upper step of the ladder. A gas spring is connected between the deck and the ladder to counterbalance the weight of the ladder as it swings from its lowered position to its overhead transport position. The gas spring has a desirable stabilizing influence on the ladder as it is raised and lowered. When the ladder is moved from its transport position to a lowered position, the line of force of the gas spring passes "overcenter" in relation to the ladder pivot axis thereby permitting the gas spring to releasably hold the ladder in its down position. Appropriate abutments are provided to properly position the ladder in its desired transport and lowered positions.

REFERENCES:
patent: 2757397 (1956-08-01), Valentine
patent: 3997183 (1976-12-01), Russey
patent: 3999334 (1976-12-01), Webb

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