Fire escape – ladder – or scaffold – Ladder – Supporting surface compensating means
Reexamination Certificate
2007-05-29
2007-05-29
Thompson, II, Hugh B. (Department: 3634)
Fire escape, ladder, or scaffold
Ladder
Supporting surface compensating means
Reexamination Certificate
active
11190835
ABSTRACT:
A ladder leveller for mounting onto at least one stile of a hollow runged ladder includes an elongate stile extension member, a cross bar sized for mounting journalled through a hollow rung of the ladder. A locking pin extends from the cross bar, through one of an array of apertures in the extension member and cooperates with a locking bar. The locking bar is releasably mounted onto the locking pin to lock the stile extension member onto the stile.
REFERENCES:
patent: 1290732 (1919-01-01), Gants et al.
patent: 1499300 (1924-06-01), Hayes
patent: 1609257 (1926-11-01), Lazear
patent: 1624945 (1927-04-01), Glover
patent: 1862171 (1932-06-01), Baker
patent: 2517771 (1950-08-01), Stefano
patent: 3165170 (1965-01-01), Blaney
patent: 3447631 (1969-06-01), Smith
patent: 3998293 (1976-12-01), Raia
patent: 4014406 (1977-03-01), Easton
patent: 4607726 (1986-08-01), Davis et al.
patent: 4852689 (1989-08-01), Erion
patent: 4984655 (1991-01-01), Scherer et al.
patent: 5094320 (1992-03-01), Deitz et al.
patent: 5121813 (1992-06-01), Funston
patent: 5232067 (1993-08-01), Griffith
patent: 5325936 (1994-07-01), Baker
patent: 5476153 (1995-12-01), Dickerson et al.
patent: 5542497 (1996-08-01), Macyszyn
patent: 5553963 (1996-09-01), Hoy et al.
patent: 5678656 (1997-10-01), Lanzafame
patent: 5718306 (1998-02-01), Baker
patent: 6293367 (2001-09-01), Gulseth
patent: 6374947 (2002-04-01), Nurkiewicz
patent: 6435306 (2002-08-01), Stoneberg
patent: 6595326 (2003-07-01), Dean
patent: 6948591 (2005-09-01), Scott et al.
patent: 7036633 (2006-05-01), Lanzafame
patent: 2274330 (1942-02-01), None
Jules Leona B.
Whittingham Richard K.
Edwards Antony C.
Thompson II Hugh B.
LandOfFree
Ladder leveller 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 leveller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ladder leveller will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3772640