Rotary weeding and edging attachment for rotary power source

Claim 1

In combination, a portable manually controllable drill motor having an axial tool accommodating and attaching chuck, an inverted cuplike shell constituting a hoodlike guard housing embodying an axially apertured horizontal plate having a depending annular rim adapted to be seated atop the surface of the earth which is to be worked, said rim having depending ground penetrating and anchoring cleats, a hub fixed atop said plate and embodying an upstanding sleeve, said sleeve providing a shaft bearing and being aligned with the aperture in said plate, a vertically elongated shaft having upper and lower ends and an intervening median portion slidingly and rotatably mounted in said aperture and bearing, respectively, the upper end of said shaft being removably but operatively connected with said chuck, the lower end of said shaft depending into said shell and having a blade, said blade being confined and rotatable within the confining limits of said shell, said blade being horizontally elongated, flat-faced, disposed at right angles to the vertical axis of said shaft and having an outer free end provided with a depending triangulate cutting and edging tooth, an expansion-type coil spring encircling a lower portion of said shaft and having a lower end resting on and having end thrust engagement with a portion of said sleeve, collar means adjustably mounted on said shaft and providing a shoulder, said spring having an upper end and said upper end having end thrust engagement with said collar Means, said collar means comprising a stop collar provided with setscrews engaging coacting surface portions of said shaft, and a bushing surrounding the shaft and provided with an encircling flange abutting said collar and a plurality of washers surrounding that part of the lower end portion of said shaft which is located within said shell, said washers being independent and free to slide and turn on said shaft.