Patent ID: 7036297

Claim:
An attachment assembly for a trimmer operable to support a head of the trimmer at a constant height above the ground, the attachment assembly comprising: a wheel operable to support the trimmer's weight; a unitary four sectional rod extending from the wheel, including a substantially horizontal axle section extending through a hub of the wheel and operable to transfer the weight of the trimmer to the wheel while allowing free rotation of the wheel, a single trailing section extending forwardly and upwardly from the axle section at an approximately ninety degree angle to the axle section, a centering section aligned at an approximately ninety degree angle to the trailing section and extending substantially parallel to the axle section, and a vertical section extending substantially vertically from the centering section, wherein as long as the vertical section is held substantially vertical the wheel follows the vertical section in order to provide a castering effect; and a mounting mechanism for rotationally mounting the vertical section to a shaft of the trimmer, the mounting mechanism including a rod mount operable to rotate about the vertical section and selectively slide up and down the vertical section in order to define the height, wherein the rod mount is operable to rotate about the vertical section while engaging the vertical section to prevent sliding up and down the vertical section, a shaft mount rotationally secured to the rod mount, thereby operable to adjustably define an angle between the vertical section and the shaft, a first knob operable to selectively prevent rotation of the rod mount with respect to the vertical section, a second knob operable to selectively prevent rotation of the shaft mount with respect to the rod mount, and wherein the knobs may be operated without the use of tools.