Locking hinge mechanism for a stepladder

Details Locking hinge mechanism for a stepladder Locking hinge mechanism for a stepladder

1976-07-15

1977-06-07

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Convertible

Ladder

16171, E06C 112

Patent

active

040277410

ABSTRACT:
Hinge mechanism for locking the two foldable sections of an extension stepladder in spread-apart position. Each section has a locking pin and slot at its upper end for interlocking with a complementary slot and pin on the other section when the sections are swung apart on one of said pins as a pivot, the pin and slot on one section being disengageable from the slot and pin on the other section by relative longitudinal movement of the sections when the sections are folded together.

REFERENCES:
patent: 1050273 (1913-01-01), Hattenback
patent: 1549696 (1925-08-01), Wernli
patent: 1579701 (1926-04-01), Givens
patent: 2133003 (1938-10-01), Webster

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