Patent ID: 6810967
Filing Date: 2004-11-02
Classification: A01D

Abstract:
A grass and soil trimming system for neatly cleaning an area around a sprinkler head comprising, in combination:a motor driven yard tool from the class of motor driven yard tools including but not limited to weeders and edgers, the yard tool having a motor and a power drive shaft, the drive shaft having a first end coupled to the motor of the yard tool and a second end having male threads; a housing having a generally cylindrical configuration being fabricated of a resilient plastic with a circular periphery, a top face and an interior region, the top face having a cylindrical flange extending into the interior region, the flange having a central bore with an inward edge and an outward edge, the circular periphery having four apertures equally spaced there around; a metal mounting screw of a generally cylindrical configuration with an outward lip and a female threaded interior and an interior locking screw, the mounting screw being adapted to lie within the central bore of the flange on the house with the outward lip of the mounting screw lying adjacent to the outer edge of the flange, the interior locking screw holding the mounting screw to the housing with a washer lying between the mounting screw and interior edge of the flange, the female threaded interior of the mounting screw being adapted to screwably couple to the male threading of the drive shaft on the yard tool there by transferring the rotational energy from the motor to the housing; a first pair of metal cutting blades being adapted to cut and dig soil and having a generally isosceles triangular configuration each with a first long edge, a second long edge and a short edge, the first long edge having a cutting surface and the second long edge being dull, the first cutting blades also having a first circular aperture there through adjacent to the short edge, the first circular apertures of the first pair of metal cutting blades being adapted to be coupled within the interior region of the housing adjacent to two of the four apertures of the housing such that the first blades are on opposite side of each other and held in place with a first pair of nuts and bolts; and a second pair of metal cutting blades being adapted to cut grass and each having a generally isosceles triangular configuration with a first sharp edge and a second dull edge and a base with a second circular aperture adjacent thereto, the second cutting blades having a generally 90 degree bend between the edges and the base, the base of the second blades being adapted to lie adjacent to the periphery of the housing with the cutting blades lying linear with the top face of the housing and second circular apertures of the second blades being aligned with the remain apertures of the housing such that they too lie on opposite sides of each other and being coupled with a second pair of nuts and bolts, the cutting surfaces of the first blades and the sharp edges of the second blades being configured such that when the housing is rotating all the blades will have a cutting action.