Patent ID: 8402603

Claim:
In a stair structure including a horizontal tread, having a width, that meets a vertical riser, having a height, at an inward corner, and the width of the horizontal tread is greater than the height of the vertical riser, a vacuum cleaner nozzle, comprising: a nozzle body including a business end having opposed upper and lower extremities forming an angle with one another and meeting at an outward corner, the opposed upper and lower extremities and the outward corner to be concurrently applied to the vertical riser, the horizontal tread, and the inward corner, respectively; an unbroken front suction opening formed in the upper extremity, the lower extremity, and the outward corner; the unbroken front suction opening has a first length extending along the upper extremity and a second length extending along the lower extremity; and the first length of the unbroken front suction opening is substantially equal to the height of the vertical riser, and the second length of the unbroken front suction opening of the lower extremity is longer than the first length of the unbroken front suction of the upper extremity and is substantially equal to the width of the horizontal tread being greater than the height of the vertical riser, so as to cause the unbroken front suction opening to provide a concurrent suction along substantially the entire height of the vertical riser from the first length of the unbroken front suction opening, substantially the entire width of the horizontal tread from the second length of the unbroken front suction opening, and the inward corner from the unbroken front suction opening at the outward corner of the nozzle body.