Static structures (e.g. – buildings) – Stepped; e.g. – stair – Helical type
Patent
1998-04-06
1999-11-16
Kent, Christopher T.
Static structures (e.g., buildings)
Stepped; e.g., stair
Helical type
52182, 52183, E04F 1100
Patent
active
059835800
ABSTRACT:
A stair frame may be used to form a straight staircase, a spiral staircase, or a combination of the two. The stair frame includes an elongated angle having a leg and a back, the back cut into a plurality of independent back portions and the leg bent into a zigzag shape with alternating vertical and horizontal leg portions. A rail is fastened to the upper end of each vertical portion back and the forward end of each horizontal portion back to secure the angle into a sturdy frame which may be bent into a helical pattern. The horizontal leg portions serve the dual purpose of forming sturdy frame, and supporting one end of the staircase treads.
REFERENCES:
patent: D271524 (1983-11-01), Suckno
patent: D282103 (1986-01-01), Gregoire
patent: D288720 (1987-03-01), Gould
patent: 853134 (1907-05-01), Steiber
patent: 1087434 (1914-02-01), Bone
patent: 2704383 (1955-03-01), Berg
patent: 3230907 (1966-01-01), Morford et al.
patent: 3556251 (1971-01-01), Whitehead
patent: 3626438 (1971-12-01), Cornell
patent: 3686806 (1972-08-01), Verderio
patent: 3885365 (1975-05-01), Cox
patent: 3962838 (1976-06-01), Cox
patent: 4041662 (1977-08-01), Ward
patent: 4128976 (1978-12-01), Classen
patent: 4338751 (1982-07-01), Sanders
patent: 4378862 (1983-04-01), Carmel
patent: 4438608 (1984-03-01), Hamm
patent: 4457398 (1984-07-01), Loix
patent: 4660335 (1987-04-01), Scholler
patent: 4881351 (1989-11-01), Hamm
patent: 5502933 (1996-04-01), Skillern
patent: 5515657 (1996-05-01), Chou
patent: 5632124 (1997-05-01), Weingarten et al.
patent: 5660009 (1997-08-01), Cousin
Kent Christopher T.
Maddox Nkeisha J.
Thomte Dennis L.
LandOfFree
Stair frame does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Stair frame, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stair frame will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1309293