Fire escape – ladder – or scaffold – Convertible – Ladder
Reexamination Certificate
2008-04-29
2008-04-29
Chin-Shue, Alvin (Department: 3634)
Fire escape, ladder, or scaffold
Convertible
Ladder
C182S163000
Reexamination Certificate
active
10706308
ABSTRACT:
Ladder configurations and components are provided including an outer rail assembly which is longitudinally adjustable relative to an inner rail assembly. The outer rail assembly may include a pair of spaced apart outer rails each fixedly coupled to an associated sleeve or sliding mechanism. Each sleeve is in turn slidably coupled to an inner rail of the inner rail assembly. The outer rails may be positioned and oriented at an acute angle relative to the inner rails so as to provide an increased base distance between the two outer rails. Support structures are also disclosed which are coupled at multiple locations along a rail member and at least one location of a rung. Additionally, ladder hinges are disclosed including hinge components configured to effectively transmit loads from associated rails. In one embodiment the hinge may include a pinch prevention mechanism.
REFERENCES:
patent: 453193 (1891-06-01), Kinser
patent: 1973774 (1934-09-01), Pflugradt
patent: 2144440 (1939-01-01), Gaffers
patent: 2186119 (1940-01-01), Moen
patent: 3002582 (1961-10-01), Marcelis
patent: 3318413 (1967-05-01), Werner et al.
patent: 3327385 (1967-06-01), Shaver
patent: 3692143 (1972-09-01), Kummerlin et al.
patent: 3811151 (1974-05-01), Kuemmerlin
patent: 3849834 (1974-11-01), Mayer
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: 4371055 (1983-02-01), Ashton et al.
patent: 4376470 (1983-03-01), Ashton
patent: 4407045 (1983-10-01), Boothe
patent: 4474264 (1984-10-01), Krause
patent: 4540306 (1985-09-01), Wang
patent: 4566150 (1986-01-01), Boothe
patent: 4597687 (1986-07-01), Colas
patent: 4656721 (1987-04-01), Werner
patent: 4697305 (1987-10-01), Boothe
patent: 4698896 (1987-10-01), Osterwald et al.
patent: 4773503 (1988-09-01), Purkapile
patent: 4890950 (1990-01-01), Yoo
patent: D309502 (1990-07-01), Wing et al.
patent: 4947959 (1990-08-01), Yuen
patent: 4967879 (1990-11-01), Klafs et al.
patent: 4974701 (1990-12-01), Parise
patent: 5002153 (1991-03-01), Yuen
patent: 5279387 (1994-01-01), Swiderski et al.
patent: 5353892 (1994-10-01), Lu
patent: 5359812 (1994-11-01), Mayfield
patent: 5366051 (1994-11-01), Bartnicki et al.
patent: 5419084 (1995-05-01), Sankey et al.
patent: 5515942 (1996-05-01), Woodfield
patent: 5954157 (1999-09-01), Grimes et al.
patent: 5966777 (1999-10-01), Jantschek
patent: 6032759 (2000-03-01), Yeh
patent: 6141909 (2000-11-01), Hanson
patent: 6220389 (2001-04-01), Krause
patent: 6269909 (2001-08-01), Grimes et al.
patent: 6298605 (2001-10-01), Delefosse et al.
patent: 6343406 (2002-02-01), Yeh
patent: 6533882 (2003-03-01), Woodside
patent: 6866117 (2005-03-01), Moss
patent: 7047597 (2006-05-01), Lee
patent: 2003/0188923 (2003-10-01), Moss
patent: 195 39 157 (1997-04-01), None
patent: 0 324 885 (1989-07-01), None
patent: 1002235 (1997-08-01), None
PCT International Search Report dated Jul. 19, 2004.
Bowers Jack W.
Francis David
Moss Newell R.
Chin-Shue Alvin
TraskBritt
Wing Enterprises, Inc.
LandOfFree
Combination ladder, ladder components and methods of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Combination ladder, ladder components and methods of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combination ladder, ladder components and methods of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3908643