Patent ID: 7966736
Filing Date: 2011-06-28
Classification: A01D

Abstract:
1. A grass-cutting head with an axis of rotation, the grass-cutting head comprising: a body forming a housing for at least one spool of cutting line, provided with at least one outlet hole for an end of said cutting line wound on said spool, said body comprising a projection and a substantially cylindrical surface, said projection having a shape of a portion of a spiral, said projection gradually projecting from said substantially cylindrical surface of said body, said projection ending with an end surface, said end surface intersecting said substantially cylindrical surface, said outlet hole being arranged on said end surface; a guide channel in communication with said at least one outlet hole for receiving the cutting line, said guide channel extending from the inside of said housing towards the outlet hole and having an inclined shape, gradually moving away from said axis of rotation, said guide channel being provided in said projection, said guide channel defining a radially outward concave guiding surface formed in said body, said concave guiding surface having a concavity facing the axis of rotation, wherein a portion of said cutting line inside said guide channel has a concave path in an operating phase and a non-operating phase, said concave path being the same in said operating phase and in said non-operating phase.