Fire escape – ladder – or scaffold – Ladder – Supporting surface compensating means
Reexamination Certificate
2006-05-02
2006-05-02
Thompson, II, Hugh B. (Department: 3634)
Fire escape, ladder, or scaffold
Ladder
Supporting surface compensating means
C248S188200
Reexamination Certificate
active
07036633
ABSTRACT:
A quick release ladder leveler attachment system. So that a leveler may be mounted or released from the rails of a ladder quickly and without requiring the use of tools, a leveler attachment structure is added to the lower outer surface of the ladder rails. It may be integrated with the ladder rails or attached to ladder rails with bolts or rivets. The attachment structures include surfaces that engagingly mate with mounting structures on the leveler. The attachment and mating structures may be a keyhole slot and a knob. A spring catch may retain the leveler in place and a locking pin may be added to ensure safety.
REFERENCES:
patent: 63468 (1867-04-01), Card
patent: 769419 (1904-09-01), Wagner
patent: 783259 (1905-02-01), Friend
patent: 891729 (1908-06-01), Phipps
patent: 970425 (1910-09-01), Curran
patent: 971997 (1910-12-01), Brasington
patent: 979821 (1910-12-01), Brasington
patent: 1033685 (1912-07-01), Eskew
patent: 1223367 (1917-04-01), Brown
patent: 1236269 (1917-08-01), Cole
patent: 1251192 (1917-12-01), Drummond
patent: 1265636 (1918-05-01), Farnsworth
patent: 1280741 (1918-10-01), Hunn
patent: 1329740 (1920-02-01), Barron
patent: 1376777 (1921-05-01), O'Connor
patent: 1393536 (1921-10-01), Hunt
patent: 1419748 (1922-06-01), Miller
patent: 1462505 (1923-07-01), Hunt
patent: 1508392 (1924-09-01), Heun
patent: 1560978 (1925-11-01), Crump
patent: 1733338 (1929-10-01), Enke
patent: 1862171 (1932-06-01), Baker
patent: 1887495 (1932-11-01), Carter
patent: 2147052 (1939-02-01), Nonne
patent: 2152895 (1939-04-01), Longtin
patent: 2245306 (1941-06-01), Smith
patent: 2331629 (1943-10-01), Reilly
patent: 2350166 (1944-05-01), Kimes
patent: 2405269 (1946-08-01), Prutsman
patent: 2449609 (1948-09-01), Linder et al.
patent: 2458076 (1949-01-01), Houston
patent: 2517771 (1950-08-01), Stefanoy
patent: 2552941 (1951-05-01), Courtne
patent: 2598875 (1952-06-01), Anderson
patent: 2608336 (1952-08-01), Dole
patent: 2936849 (1960-05-01), Larson
patent: 2945713 (1960-07-01), Sears
patent: 3016103 (1962-01-01), Studer
patent: 3047061 (1962-07-01), Wilcox et al.
patent: 3165170 (1965-01-01), Blaney
patent: 3170708 (1965-02-01), Miller
patent: 3173512 (1965-03-01), Sturdy et al.
patent: 3179206 (1965-04-01), Sturder
patent: 3233702 (1966-02-01), Lent
patent: 3233703 (1966-02-01), Feltrop
patent: 3406785 (1968-10-01), Pilcher
patent: 3484814 (1969-12-01), Meehan
patent: 3527321 (1970-09-01), Brown
patent: 3554321 (1971-01-01), Steadman
patent: 3882966 (1975-05-01), Fasano
patent: 3908796 (1975-09-01), Hurwitz
patent: 3948352 (1976-04-01), Larson et al.
patent: 3973860 (1976-08-01), Kern
patent: 4014406 (1977-03-01), Easton
patent: 4085820 (1978-04-01), Cerny
patent: 4095671 (1978-06-01), Forristall et al.
patent: 4147231 (1979-04-01), Chantler et al.
patent: 4249638 (1981-02-01), Fernandez
patent: 4423797 (1984-01-01), Batten
patent: 4606432 (1986-08-01), Belt
patent: 4607726 (1986-08-01), Davis et al.
patent: 4683980 (1987-08-01), Vayko
patent: 4744441 (1988-05-01), Sandstrom
patent: 4766976 (1988-08-01), Wallick
patent: 4802471 (1989-02-01), Cordell
patent: 4807720 (1989-02-01), Kim
patent: 4984655 (1991-01-01), Scheprer et al.
patent: 4995474 (1991-02-01), Gauthier
patent: 5027923 (1991-07-01), Derome
patent: 5044468 (1991-09-01), Worthington
patent: 5148892 (1992-09-01), Lu
patent: 5174412 (1992-12-01), Vega
patent: 5222575 (1993-06-01), Santos
patent: 5273133 (1993-12-01), Thocher et al.
patent: 5307900 (1994-05-01), Noga
patent: 5325936 (1994-07-01), Baker
patent: 5341899 (1994-08-01), Casamento
patent: 5464071 (1995-11-01), Rice
patent: 5476153 (1995-12-01), Dickerson et al.
patent: 5497850 (1996-03-01), Patterson
patent: 5507364 (1996-04-01), Spevak
patent: 5526898 (1996-06-01), Clark
patent: 5542497 (1996-08-01), Macyszyn
patent: 5551529 (1996-09-01), Molitor
patent: 5553963 (1996-09-01), Hoy
patent: 5609222 (1997-03-01), Horbacewicz
patent: 5669462 (1997-09-01), Jennings
patent: 5678656 (1997-10-01), Lanzafame
patent: 5695164 (1997-12-01), Hartman et al.
patent: 5704451 (1998-01-01), King
patent: 5718306 (1998-02-01), Baker
patent: 5755307 (1998-05-01), Dunnewin et al.
patent: 5771992 (1998-06-01), Snyder
patent: 5791438 (1998-08-01), Kempton
patent: 5816364 (1998-10-01), Christy et al.
patent: 5845744 (1998-12-01), Beck et al.
patent: 5853065 (1998-12-01), Hutson et al.
patent: 6234273 (2001-05-01), Moore
patent: 6349907 (2002-02-01), Hollington
patent: 6374947 (2002-04-01), Nurkiowicz
patent: D457650 (2002-05-01), MacDuff
patent: 6595326 (2003-07-01), Dean
patent: D479339 (2003-09-01), McDonald
patent: 6702066 (2004-03-01), Eaton
patent: 2002/0117821 (2002-08-01), Abraham
patent: 2003/0122333 (2003-07-01), Abraham
Graybeal Jackson Haley LLP
Thompson II Hugh B.
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