Fire escape – ladder – or scaffold – Ladder with pivoted prop – Section extensible below prop pivot
Reexamination Certificate
2008-04-29
2011-12-06
Shue, Alvin Chin (Department: 3634)
Fire escape, ladder, or scaffold
Ladder with pivoted prop
Section extensible below prop pivot
C182S204000
Reexamination Certificate
active
08069948
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: 305347 (1884-09-01), Smith
patent: 453193 (1891-06-01), Kinser
patent: 674950 (1901-05-01), Williamson
patent: 1013515 (1912-01-01), Reed
patent: 1116073 (1914-11-01), Johnson et al.
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 et al.
patent: 3849834 (1974-11-01), Mayer
patent: 3858684 (1975-01-01), Goings
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), Swinderski et al.
patent: 5305851 (1994-04-01), Katson 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: 5590739 (1997-01-01), High et al.
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: 6698550 (2004-03-01), Crain
patent: 6866117 (2005-03-01), Moss
patent: 7047597 (2006-05-01), Lee
patent: 2003/0188923 (2003-10-01), Moss
patent: 19539157 (1997-04-01), None
patent: 0324885 (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
Holland & Hart LLP
Wing Enterprises, Inc.
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