초록 ▼

A prefabricated stair system having individually pivotally mounted right angular brackets on opposed stringers, has a control bar which removably contacts the brackets to assume all brackets are arranged at the same angles with respect to the stringer so that the treads, which are supported by oppos

A prefabricated stair system having individually pivotally mounted right angular brackets on opposed stringers, has a control bar which removably contacts the brackets to assume all brackets are arranged at the same angles with respect to the stringer so that the treads, which are supported by opposed pairs of brackets, are parallel to the floors and the risers supported by the brackets are perpendicular to the treads. The stair system is shipped as a kit and assembled in situ following a method of assembly and installation.

대표청구항 ▼

A stringer system for a stair comprising: (a) a stringer having a flat surface and provided with a plurality of holes having equally spaced axes, said axes being disposed generally in longitudinal alignment with each other along a prescribed straight line; (b) a plurality of brackets respectively ha

A stringer system for a stair comprising: (a) a stringer having a flat surface and provided with a plurality of holes having equally spaced axes, said axes being disposed generally in longitudinal alignment with each other along a prescribed straight line; (b) a plurality of brackets respectively having individual webs being received adjacent to said surface and having individual tread support surfaces; (c) pivot pins mounted to said brackets, said pivot pins having axes spaced a prescribed equal distance apart from each other, said pivot pins being respectively received in said holes and respectively connected to said brackets so that each bracket may pivot about its pivot pin in a plane parallel to said flat surface to various angular positions with respect to said straight line; (d) said brackets being respectively provided with sockets having axes respectively spaced from the axes of the pivot pins of these brackets by said prescribed distance; (e) a control rod; (f) a plurality of fingers protruding from said control rod, said fingers having axes perpendicular to said rod and spaced from each other by a distance approximately equal to said distance between the axes of said pivot pins, said fingers being received respectively in said sockets for simultaneously moving said brackets on said stringer about the axes of their respective pivot pins, so as to simultaneously pivot said brackets such that all of said tread support surfaces are simultaneously disposed at the same angular positions with respect to said straight line; (g) said fingers being removable from said sockets by movement of said rod after said angles positions of said brackets have been set.