Fire escape – ladder – or scaffold – With insulation
Patent
1994-05-17
1996-05-14
Chotkowski, Karen J.
Fire escape, ladder, or scaffold
With insulation
182194, E06C 100, E06C 700
Patent
active
055159427
ABSTRACT:
The invention is directed to strong, lightweight, electrically non-conducting ladder stiles and ladders formed therefrom. Each ladder stile comprises a tension and compression portion structurally interconnected by a spacing portion. The spacing portion has a cross section which varies over the length of the stile between sections where the entire spacing portion is the full width of the stile and sections where at least part of the spacing portion is less than the full width of the stile. The ladders of the invention are formed of two ladder stiles interconnected by rungs.
REFERENCES:
patent: 433547 (1882-06-01), Johansson
patent: 2862650 (1958-12-01), Scott et al.
patent: 2885132 (1959-05-01), Campbell
patent: 2966229 (1960-12-01), Frezieres
patent: 2982373 (1961-05-01), Hopfeld
patent: 3158224 (1964-11-01), Van Name et al.
patent: 3193051 (1965-07-01), Dosker
patent: 3490188 (1970-01-01), Troutner
patent: 3734237 (1973-05-01), Howard
patent: 3999628 (1976-12-01), Parson
patent: 4029172 (1977-06-01), Green
patent: 4191000 (1980-03-01), Henderson
patent: 4195462 (1980-04-01), Keller et al.
patent: 4244760 (1981-01-01), Smith
patent: 4336678 (1982-06-01), Peters
patent: 4413459 (1983-11-01), Lambuth
patent: 4677806 (1987-07-01), Tuomi
patent: 4852322 (1989-08-01), McDermid
patent: 5163532 (1992-11-01), McCarty
West German Patent Abstracts, Week T27, Building, Mining, Mechanical Handling, p. 2, regarding German Patent Publication No. DE 2053100 (29 Oct. 1970).
West German Patent Abstracts, Week W48, Blinds; Shutters; Ladders, p. 14, regarding German Patent Publication No. DE 2507761 (20 Nov. 1975).
West German Patent Abstracts, Week B14, Buildings; Construction, p. 4, regarding German Patent Publication No. DE 2741936 (29 Mar. 1979).
West German Patent Abstracts, Week B14, Buildings; Construction, pp. 1-2, regarding German Patent Publication No. DE 3828749 (1 Mar. 1990).
Dialog.TM. Database Abstract, World Patent Index (WPI), Files 350-351, 2 pages total, regarding German Patent Publication No. DE 4023426 (6 Feb. 1992).
Patent Abstracts of Japan, ABS vol. 14, No. 91, ABS Publication Date: Feb. 20, 1990, 1 page total, regarding Japanese Patent Publication No. 01-301492 (5 Dec. 1989).
Patent Abstracts of Japan, ABS vol. 10, No. 375, ABS Publication Date: Dec. 13, 1986, 2 pages total, regarding Japanese Patent Publication No. 61-166790 (28 Jul. 1986).
Chotkowski Karen J.
Palmerston Extension Ladder Company Limited
LandOfFree
Ladder stiles and ladders produced therefrom does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ladder stiles and ladders produced therefrom, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ladder stiles and ladders produced therefrom will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1890912