MULTI-FLIGHT STAIRS Russian patent published in 2024 - IPC E04F11/22 

FIELD: staircase designs.

SUBSTANCE: invention can be used in construction and everyday life. The technical result is achieved by the fact that a multi-flight stairs consists of at least two flights of stairs connected by at least one landing, with each flight of stairs consisting of a frame and at least one step attached to this frame by at least one mounting bracket, consisting of a mounting and rotary paw, each of which is made of a base and a side wall perpendicular to it, the base of the paws contain at least one mounting hole, through which the mounting paw is attached to the frame, and the rotary paw is attached to the step, while on the side wall of the rotary paw there is a through arcuate groove, and the mounting and rotary paws are connected by the side walls by means of two fasteners, the first of which is the axis of rotation of the paws, and the second is fixed in the side wall of the mounting paw with the ability to slide along the arcuate groove of the rotary paw, while the arcuate slot is made long, allowing the planes of the paw bases to be positioned at an angle in the range of 25-90°, and the side wall of one of the paws contains an additional through hole.

EFFECT: expanding the range of multi-flight stairs allowing for a wide range of adjustment of the angle of inclination of the steps and sufficient reliability of fixing the required position of the steps.

6 cl, 10 dwg