Quick stand adjusting device

Details Quick stand adjusting device Quick stand adjusting device

1991-09-19

1992-09-22

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Ladder

Supporting surface compensating means

2481884, 182111, E06C 744

Patent

active

051488922

ABSTRACT:
A quick stand adjusting device for adjusting the height of the stand of a ladder, a chair, an instrument or equipment, comprising a split retainer controlled by a control device, which is comprised of a crank, a transmission rod and a movable stop block, to move in and out of a recessed chamber in a lock socket at the bottom so as to engage or release a support which is extendibly inserted in the stand.

REFERENCES:
patent: 2911134 (1959-11-01), Derby
patent: 3021921 (1962-02-01), Poelvoorde
patent: 4744441 (1988-05-01), Sandstrom
patent: 4766976 (1988-08-01), Wallick
patent: 4792017 (1988-12-01), Grove
patent: 4995474 (1991-02-01), Gauthier

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