Tripod extension stepladder

Fire escape – ladder – or scaffold – Ladder with pivoted prop – Lateral prop

Reexamination Certificate

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Details

C182S200000

Reexamination Certificate

active

10972925

ABSTRACT:
The present invention10discloses a stepladder having a ladder portion18that is comprised of rungs24and includes two ladder side rails, and a support portion that includes two angularly disposed telescoping legs20that provide mechanism for stabilizing the ladder. The telescoping support legs20are interconnected to each other and to the ladder side rails by lockable rigid spanner arms22. When in use, the spanner arms22are locked in an open position to form a tripod formation between the rails while additionally limiting the angle of spread between the ladder portion18and the support legs20. The present invention10also provides a retractable fly assembly26at the top of the ladder rails to provide for additional usable working height. A safety belt36is provided on the handle for additional support. A series of apertures with lock key fasteners28in each of the support legs provide mechanism for the user to securely position the legs at a desired length. The lock key fastener28includes a locking pin that engages an aperture in the corresponding leg to secure the desired position.

REFERENCES:
patent: 46106 (1865-01-01), Hayes
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patent: 4249637 (1981-02-01), Glasgow
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patent: 5590739 (1997-01-01), High et al.
patent: 6533071 (2003-03-01), Smith
patent: 0.039.078 (1981-04-01), None
patent: WO00/32900 (2000-06-01), None

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