Rung lock and latch assembly for an extension ladder

Details Rung lock and latch assembly for an extension ladder Rung lock and latch assembly for an extension ladder

1994-02-17

1995-07-04

Chin-Shue, Alvin C.

Fire escape, ladder, or scaffold

Ladder

Extension

E06C 706

Patent

active

054292077

ABSTRACT:
A rung lock frame and a mechanical latching structural assembly for selectively releasably locking and releasably and augmentally latching a pair of adjacently positioned rungs of relatively slidable ladder sections of an extension ladder, the rung lock frame and latching structure including guide rib and inclined ramp arrangement to permit ready movement of said latching structure into and out of augmental latching position on the rung lock frame.

REFERENCES:
patent: 613848 (1898-11-01), Seagrave
patent: 802017 (1905-10-01), Newton
patent: 873110 (1907-12-01), Williamson
patent: 1113413 (1914-10-01), Conabee
patent: 1210827 (1917-01-01), Myers
patent: 3565211 (1971-02-01), Leblanc
patent: 4299306 (1981-11-01), Hawkins
patent: 5117943 (1992-06-01), Schmitt et al.

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