Method for constructing a balanced stair

Details Method for constructing a balanced stair Method for constructing a balanced stair

2005-01-25

2005-01-25

Friedman, Carl D. (Department: 3635)

Static structures (e.g., buildings)

Processes

Stair

C052S182000

Reexamination Certificate

active

06845595

ABSTRACT:
For designing a balanced stair comprising steps with treads (1-15) showing front edges (26), a line of travel (22) is determined on the stair and a reference line is determined onto each step in a predetermined position with respect to the front edge (26) thereof. In contrast to the prior art methods wherein the reference lines, more particularly the front edges (26) or the risers (25) of the steps, are divided along the line of travel (22) on constant mutual distances measured on the line of travel itself, the substantially constant mutual distances (d) between the reference lines is determined according to the invention near the line of travel (22) along a measuring line (27) which is determined for each pair of adjoining reference lines so as to form a substantially constant angle (α) with at least one of the adjoining reference lines thereof. In this way, a stair which is easier to walk on and which automatically shows a more regular nosing line at the outer string (21) is obtained FIG.8.

REFERENCES:
patent: 4367613 (1983-01-01), Strub
patent: 5347774 (1994-09-01), Smith
patent: 5632124 (1997-05-01), Weingarten et al.
patent: 30 49 527 (1982-07-01), None
patent: 197 05 611 (1998-10-01), None
patent: 2 299 471 (1975-03-01), None

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