Positioning joint for folding ladders

Details Positioning joint for folding ladders Positioning joint for folding ladders

1987-10-13

1988-09-13

Kundrat, Andrew V.

Joints and connections

Articulated members

Lockable at fixed position

403324, 182163, F16C 1100

Patent

active

047705590

ABSTRACT:
A positioning joint for a folding ladder comprising a first joint member having a locking device, and a second joint member having a relatively fitted guide-disc plate. The two joint members are relatively pivotable about a common axis and are lockable in a series of predetermined angular positions by engaging the locking device provided on the first joint member in notches formed at the peripheral edge of the other member, under the control of the guide-disc plate.

REFERENCES:
patent: 1696357 (1928-12-01), Johnson
patent: 4577986 (1986-03-01), Wang
patent: 4666327 (1987-05-01), Su

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