Patent ID: 8567074

Claim:
A grass-cutting head comprising: a spool for winding at least one cutting line; and a housing for the at least one cutting line, wherein said housing comprises a first part and a second part coupled to each other so as to allow at least one reciprocal angular movement around an axis of rotation of the grass-cutting line, said housing comprising at least one passage towards the outside for a cutting line, at least one inserting portion being defined on said spool for a cutting line such that at a rotation of the spool corresponds a winding or unwinding of the cutting line, a winding means being present for winding said at least one cutting line around said spool and a matching means for matching an angular position of said at least one inserting portion on the spool with said at least one passage towards the outside of the housing designed to facilitate the operations for inserting the at least one cutting line into the spool, wherein said matching means for matching the angular position comprises at least one reversible coupling between at least one abutment associated with one of said first part and said second part and one corresponding counter-abutment associated with the other of said first part and said second part such that said at least one inserting portion and said at least one passage are mutually aligned to allow the cutting line to pass throughout when said at least one abutment is coupled with said corresponding counter-abutment, said at least one abutment being a tooth comprising an inclined sliding face and an opposite abutment face for the tooth, wherein a seat of reversible coupling is defined on a tip of said tooth, between said two inclined and abutment faces, on which said counter-abutment is designed respectively to slide and to couple, wherein sliding on said sliding face corresponds to an axial relative displacement between said first part and said second part from a position in which the head is in a use position to a position in which the head receives or extracts the at least one line from said spool.