Convertible ladder

Details Convertible ladder Convertible ladder

2007-09-04

2007-09-04

Chin-Shue, Alvin (Department: 3634)

Fire escape, ladder, or scaffold

Convertible

Ladder

C182S163000

Reexamination Certificate

active

10977781

ABSTRACT:
A ladder having a first ladder section, a second ladder section, an adjustable hinge mechanism, an engagement indicator and a static hinge mechanism. The adjustable hinge mechanism is mounted with respect to the first ladder and the second ladder so that the adjustable hinge mechanism is moveable between an engaged position and a disengaged position. The static hinge mechanism enables the first and second ladder sections to be maintained in a stationary position with respect to each other.

REFERENCES:
patent: 317024 (1885-05-01), Schumann
patent: 445453 (1891-01-01), Nowland
patent: 1942210 (1934-01-01), Harting
patent: 3476211 (1969-11-01), Cormier
patent: 3481026 (1969-12-01), Lindesmith et al.
patent: 3692143 (1972-09-01), Kummerlin et al.
patent: 3811151 (1974-05-01), Kuemmerlin
patent: 4031981 (1977-06-01), Spencer
patent: 4060150 (1977-11-01), Hughes
patent: 4061203 (1977-12-01), Spencer et al.
patent: D248777 (1978-08-01), Spencer et al.
patent: RE30020 (1979-06-01), Spencer et al.
patent: 4182431 (1980-01-01), Wing
patent: 4210224 (1980-07-01), Kummerlin et al.
patent: 4216844 (1980-08-01), Klafs
patent: 4298093 (1981-11-01), Wing
patent: 4371055 (1983-02-01), Ashton et al.
patent: 4376470 (1983-03-01), Ashton
patent: 4407045 (1983-10-01), Boothe
patent: 4469193 (1984-09-01), Rumsey, Jr.
patent: 4470045 (1984-09-01), Anderson
patent: 4483415 (1984-11-01), Disston et al.
patent: 4502566 (1985-03-01), Wing
patent: 4566150 (1986-01-01), Boothe
patent: 4577986 (1986-03-01), Wang
patent: 4602889 (1986-07-01), Mu-Shan
patent: 4666327 (1987-05-01), Su
patent: 4666328 (1987-05-01), Ryu
patent: 4697305 (1987-10-01), Boothe
patent: 4770559 (1988-09-01), Yoo
patent: 4773503 (1988-09-01), Purkapile
patent: 4824278 (1989-04-01), Chang
patent: 4859109 (1989-08-01), Targetti
patent: D309502 (1990-07-01), Wing et al.
patent: 4951780 (1990-08-01), Kim
patent: 4974701 (1990-12-01), Parise
patent: 5026198 (1991-06-01), Lin
patent: 5074377 (1991-12-01), Krause
patent: 5163532 (1992-11-01), McCarty
patent: 5228535 (1993-07-01), McCarty
patent: 5353892 (1994-10-01), Lu
patent: 5487207 (1996-01-01), Rey
patent: 5620272 (1997-04-01), Sheng
patent: 5775460 (1998-07-01), Stone
patent: 5954157 (1999-09-01), Grimes et al.
patent: 5992566 (1999-11-01), Yeh
patent: 6857503 (2005-02-01), Simpson et al.
patent: 2002/0166727 (2002-11-01), Cramer et al.
Brochure, “Step Stools—Ladders 2001,” Cosco, Inc., pp. 1-18 (2001).
Brochure re; The Little Giant, not dated.
Brochure, “Ladders,” Tricam Industries, pp. 1-4, not dated.
Fact Sheet, “Prostep Multi-Folding Ladder, Type I,” Tricam Industries, No. 001-1 (Mar. 1994).
Brochure, “Jaws / Climbing systems for professionals and do-it-yourselfers,” Featherlite Industries (1996).
Spec sheet, “Fiberglass VersaLadder™,” Versa Products Inc., not dated.
Brochure, “VersaLadder™, The Original, Amazing, Multi-purpose, Heavy-duty, Folding Ladder!” Versa Products Inc., not dated.
Brochure, “VersaLadder™” (Jun. 1993).
Brochure, “Unless your ladder looks like this . . . and does this . . . ” Wing Enterprises, Inc., not dated.
Operating and Safety Instructions, “Little Giant Ladder Systems, Type IA,” Wing Enterprises, Inc. (Aug. 1990).
Brochure, “Ladders,” Keller Ladders, Inc. (Aug. 1998).
Brochure, “Columbia & Blue Ribbon 1999 Ladders,” Columbia Ladders/Blue Ribbon Ladders (1999).
Keller™ 2000/2001 Product Catalog, p. 8 (2000).
Brochure, Krause (1997).
Brochure, “The Little Giant Ladder System® Fiberglass,” Wing Enterprises, date obscured.
Wing Enterprises, Inc. “Little Giant”, Aug. 1990.

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