Patent ID: 7614153

Claim:
A rotary head for garden trimmers, of the type with a cutter means pivoted to the head comprising a lower shell and an upper annular shell, the lower shell being fixable coaxially to a trimmer drive shaft and presenting several fixed pins parallel to a rotational axis of the head, for pivoting the cutter means provided with an eyelet, the upper annular shell being coaxially applicable in its working position to the lower shell, in which position the cutter means are retained on the relative fixed pins, wherein the fixed pins project upwards from the lower shell, and that to apply the upper annular shell to the lower shell in said working position bayonet connection means are provided requiring a coaxial movement to cause the two shells to approach each other and a rotation of the upper annular shell about the lower shell, this rotation being opposite to a direction of rotation (R) of the head when working.