Tubular access ladder and method

Details Tubular access ladder and method Tubular access ladder and method

2011-06-28

2011-06-28

Mitchell, Katherine (Department: 3634)

Fire escape, ladder, or scaffold

Door and ladder

C182S195000, C182S085000

Reexamination Certificate

active

07967110

ABSTRACT:
An access ladder includes a plurality of sections connected together to telescope between an extended position and a retracted position that has an increasing reactive force to counterbalance the weight of the sections as they extend. A method for accessing a room with a ladder connected to a ceiling including the steps of moving the ladder to a fully extended position subject to an increasingly active force to counterbalance the weight of the ladder as it extends. There is the step of retracting the ladder into a retracted position in the ceiling.

REFERENCES:
patent: 2446434 (1948-08-01), Rechain
patent: 2529112 (1950-11-01), Steele
patent: 2907401 (1959-10-01), Wagner
patent: 3033309 (1962-05-01), Fugere
patent: 3997026 (1976-12-01), Riehlmann
patent: 6904863 (2005-06-01), Mardikian et al.
patent: 7182175 (2007-02-01), Schmitt et al.
patent: 2004/0195043 (2004-10-01), Johansson

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