Abstract: A street clearing device comprises a share member mounted on a propulsion vehicle. A rotary member is rotatably supported below the share member. The rotary member carries a hard scraping blade and an elastic scraping blade mounted at spaced locations so that the blades may be alternately disposed in an operative position with respect to a surface to be cleared. The orientation of the rotary member is determined by an actuating assembly which includes a toggle lever and an adjustable mounting member connected to the toggle lever for adjusting the latter and thereby selectively rotate the rotary member. The actuating assembly further includes a spring operatively connected to the toggle lever to enable the toggle lever to yield in response to the hard blade striking an obstruction, but preventing the toggle lever from yielding when the elastic blade is in the operative position.