Fire escape – ladder – or scaffold – Ladder with pivoted prop – Lateral prop
Reexamination Certificate
2007-11-13
2007-11-13
Chin-Shue, Alvin (Department: 3634)
Fire escape, ladder, or scaffold
Ladder with pivoted prop
Lateral prop
C182S204000
Reexamination Certificate
active
11431325
ABSTRACT:
Stabilization devices for use with folding and/or extension ladders and methods of stabilizing ladders are disclosed herein. A stabilization device of one embodiment includes an upper shaft for operative coupling to a ladder's upper end. An outer leg has a lower end and an upper end with an aperture for receiving the shaft. An inner leg is configured for telescoping extension relative to the outer leg, and means are included for maintaining the inner leg at various positions. A foot is at the inner leg's lower end. A lower bracket selectively attaches to a ladder leg. A lower coupler selectively attaches to the outer leg. A lower strut has a first end attachable to the lower bracket and a second end attachable to the lower coupler to operatively couple the outer leg to the ladder leg and maintain a distance between the outer leg and the ladder leg.
REFERENCES:
patent: 3508628 (1970-04-01), Conrad
patent: 3568798 (1971-03-01), Pierce
patent: 4565262 (1986-01-01), Hawkins
patent: 4899849 (1990-02-01), Levi et al.
patent: 5423397 (1995-06-01), Boughner
patent: 5551529 (1996-09-01), Molitor
patent: 5868222 (1999-02-01), Charbonneau
patent: 5915498 (1999-06-01), Figliuzzi
patent: 6029774 (2000-02-01), Cothern
patent: 6044930 (2000-04-01), Hayman
patent: 6152262 (2000-11-01), Jung
patent: 6408983 (2002-06-01), Widurski
patent: 6527084 (2003-03-01), Hrincu
patent: 6672427 (2004-01-01), Sheffield
patent: 6691825 (2004-02-01), Haig
patent: 6745870 (2004-06-01), Smith
patent: 6799660 (2004-10-01), Crawford
patent: 6837338 (2005-01-01), Grover
patent: 6851518 (2005-02-01), Walker
patent: 2002/0074187 (2002-06-01), Bendle et al.
Chin-Shue Alvin
Lathrop & Gage LC
LandOfFree
Ladder stabilization device 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 stabilization device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ladder stabilization device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3832803