Patent ID: 8061042

Claim:
A mowing head comprising: a body engageable to a motor shaft, said body having a peripheral edge, said body comprising a first disk portion and a second disk portion, said first disk portion being coupled to said second disk portion, wherein said first disk portion and said second disk portion define said peripheral edge, said body having a rotation axis, a concave curvilinear continuous surface including a contrast surface and a seat, said contrast surface being fixed to said body, said contrast surface being defined by at least a portion of said concave curvilinear continuous surface, said seat being delimited by said concave curvilinear continuous surface and two opposite surfaces, said contrast surface comprising a pinching portion, said concave curvilinear continuous surface being arranged between said two opposite surfaces, said first disk portion and said second disk portion defining an elongated slit arranged on said peripheral edge with said elongated slit having elongated sides extending in a circular direction of said peripheral edge, said elongated slit having a first end and a second end, said first end being opposite said second end, said concave curvilinear continuous surface being delimited between said first end and said second end; a cutting line having an end portion; and an anchorage member for anchoring said cutting line, said anchorage member including an elastically loaded eccentric oscillating element, a pin and a helical spring, said helical spring being set about said pin, said oscillating element having an oscillating axis positioned within said seat, said oscillating element cooperating with said pinching portion, said oscillating element having a knurled edge, said knurled edge projecting from said peripheral edge to form a gripping surface for oscillating the oscillating element and releasing the cutting line, the cutting line being inserted between said first end of said elongated slit and said oscillating element, wherein said oscillating element presses said end portion of the cutting line against said at least said portion of said concave curvilinear continuous surface at least at or adjacent to said first end, said pinching portion corresponding to said at least said portion of said concave curvilinear continuous surface against which the cutting line is pressed during rotation of said body, wherein a radial distance of each point of said pinching portion from said rotation axis of said body is greater than a radial distance of said oscillating axis of said oscillating element from said rotation axis, said oscillating element being connected to at least one of said two opposite surfaces via said pin with said helical spring set thereon such that said oscillating element is elastically pivotable about an axis thereof, wherein a majority portion of said helical spring is housed in a cavity in said seat, said majority portion of said helical spring being located in said cavity at a position below said seat.