Fire escape – ladder – or scaffold – Ladder and platform
Reexamination Certificate
2002-08-29
2004-07-20
Chin-Shue, Alvin (Department: 3634)
Fire escape, ladder, or scaffold
Ladder and platform
C182S113000, C182S151000, C052S182000
Reexamination Certificate
active
06763912
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to stair assemblies, and more particularly to modular stair assemblies with different modules or components that can be connected together to suit a wide variety of different applications.
Prefabricated stair assemblies are often designed for a single application or particular use. For example, it is common to prefabricate stair assemblies for new homes, trailer homes, and so on. These stair assemblies are typically constructed of cement, and are therefore relatively heavy in weight, difficult to transport, position, and secure in place. The removal of such stair assemblies is labor-intensive and often requires special equipment. For temporary structures or structures at temporary locations, such as platforms for presentations or speeches, trailer homes, and so on, the ability to install and/or remove the stair assembly for various applications in a quick and efficient manner is desirous.
BRIEF SUMMARY OF THE INVENTION
In accordance with one aspect of the invention, a modular stair assembly comprises a stair module having a pair of spaced stair support frames with each stair support frame including an elongate base member, a rear upright support member connected to a rear end of the base member, a stringer extending diagonally from a forward end of the base member to an upper end of the rear support member, and a plurality of L-shaped risers connected to the stringer. Each riser has a vertical riser portion that extends upwardly from the stringer and a horizontal riser portion that extends rearwardly from the vertical riser portion toward the stringer. The vertical and horizontal riser portions are rigidly fixed together. A plurality of steps extend between the stair support frames and are supported by the horizontal riser portions.
In accordance with a further aspect of the invention, at least one of a transportation module, deck module, handrail module, extension deck module, and extension handrail module can be provided with the stair module so that the modular stair assembly is readily adaptable to a wide variety of different applications.
REFERENCES:
patent: 307551 (1884-11-01), Jackson
patent: 569464 (1896-10-01), Moore
patent: 750156 (1904-01-01), Bois
patent: 838266 (1906-12-01), McKee et al.
patent: 960412 (1910-06-01), Sandblom
patent: 1063216 (1913-06-01), Rendle et al.
patent: 1475777 (1923-11-01), Ballenger
patent: 1835759 (1931-12-01), Cook
patent: 1888686 (1932-11-01), O'Donnell
patent: 2150586 (1939-03-01), McAver
patent: 2205859 (1940-06-01), O'Donnell
patent: 2218523 (1940-10-01), Byington
patent: 2281698 (1942-05-01), Kogl
patent: 2287561 (1942-06-01), Page
patent: 2696027 (1954-12-01), Ryland
patent: 2949703 (1960-08-01), Katzmarek
patent: 3196997 (1965-07-01), Hager
patent: 3747708 (1973-07-01), Wenger et al.
patent: 3750351 (1973-08-01), Greenburg
patent: 4042064 (1977-08-01), Lobb
patent: 4464870 (1984-08-01), Crepeau
patent: 4580777 (1986-04-01), Johnson
patent: 4635416 (1987-01-01), Ayala
patent: 4819391 (1989-04-01), Tassin et al.
patent: 4823529 (1989-04-01), Canfield
patent: 4873802 (1989-10-01), Dahowski
patent: 5293722 (1994-03-01), Reimann
patent: 5778610 (1998-07-01), Berg
patent: 5806254 (1998-09-01), Bennett
patent: 5833576 (1998-11-01), Henni
patent: 5899032 (1999-05-01), Buzby
patent: 6205722 (2001-03-01), Bromley
patent: 6295772 (2001-10-01), Whitson
McCombs Gerukl M.
Robinson Robby C.
Century Group L.L.C.
Chin-Shue Alvin
Haynes and Boone LLP
LandOfFree
Modular stair assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Modular stair assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modular stair assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3193316