Fire escape – ladder – or scaffold – Horizontal traversing - actuation – control – or response – Holding means
Patent
1975-11-19
1976-12-14
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Horizontal traversing - actuation, control, or response
Holding means
182119, 182 15, E04G 118
Patent
active
039970248
ABSTRACT:
A portable collapsible scaffold ladder has a pair of upright caster-mounted end members joined together by a horizontal platform member. A pull-out ladder for ascending to the platform is connectable at its upper end and slidable along its connected end member for movement between a nested position within that end member and a diagonally extending operative position. The platform member is joined to the two end members by T-shaped glide members pivoted to each of the four corners of the platform member. Each glide member has a glide portion slidable along one side of a connected end member and a pivot portion pivoted to an adjacent side portion of the platform member. Each glide member has a resilient leaf-type spring which carries two locking pins, one for interlocking with the platform and the other for interlocking with one of a series of pin-receiving openings in the upright. When the pins are engaged, the glide members rigidly interlock the platform member and two end members at right angles for use, or in parallel collapsed relationship for transport. When one pin of each pair of glide members is disengaged, the platform can be moved along the adjacent end member. When the opposite pin of each pair of glide members is disengaged, the platform and end members can be freely pivoted with respect to one another.
REFERENCES:
patent: 3020972 (1962-02-01), Hockett
patent: 3190406 (1965-06-01), Usher
patent: 3212605 (1965-10-01), Dickerson
patent: 3556248 (1971-01-01), Brown
patent: 3566990 (1971-03-01), Fredricks
Fredricks Anthony T.
Smith Paul F.
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