Patent ID: 7302790

Claim:
An adjustable spindle assembly, comprising: a spindle housing; a keyed spindle shaft rotatably coupled to the spindle housing; a mow ball rotatably connected to one end of the keyed spindle shaft; a height adjustment tube connected to the mow ball and adapted to receive the keyed spindle shaft; and a string cutting assembly adjustably connected to the height adjustment tube and adapted to be fixed at various positions along the height adjustment tube, said string cutting assembly comprising a string mount and a cutting disk, said string mount comprising a pair of string holders for securing cutting string to the string mount, wherein the string holders are provided with v-shaped openings for holding the cutting string, further wherein the string mount is provided with a threaded opening and the height adjustment tube includes an exteriorly threaded surface adapted to be threaded into the threaded opening, and further wherein the string mount includes a locking plate for securing the string cutting assembly at various positions along the length of the height adjustment tube.