Abstract: The invention relates to a cutting head (1) for a vegetation cutting machine, such as a border trimmer or a brush cutter, to accommodate a coil (2) having a plurality of temporarily bonded turns (21) of at least one cutting filament (20) and exhibiting a central void (22). The cutting head including: a body (10) defining an inner recess (11) for the coil (2) and provided with a peripheral opening (12) for the emergence of a cutting filament separated from the coil, and capable of being driven in rotation by a motor, a central mandrel (13) adapted to support the at least one coil, the mandrel comprising at least one arrangement adapted to cooperate with the coil so as to provide for rotational engagement between the mandrel (13) and the coil (2). The mandrel (13) being able to selectively rotate relative to the body (10).

Abstract: The invention relates to a cutting monofilament (1) for a vegetation cutting machine such as a brush cutter or an edge trimmer, having a cross-section comprising at least two portions (10, 11, 12) made of thermoplastic materials having different mechanical properties, said cross-section being constant along a longitudinal axis (X) of the monofilament, wherein each of said portions (10, 11, 12) has a continuously varying position along said longitudinal axis of the monofilament and the arrangement of each portion relative to the cross-section is constant along said longitudinal axis. The invention also relates to a process of manufacturing monofilament, comprising drawing the monofilament from a rotating extrusion head.

Abstract: The present invention relates to a cutting member, especially to a cutting filament, for a plant-cutting device such as a scrub cutter or edge trimmer wherein at least one portion of the cutting member is a mixture of at least a polyamide, at least one thermoplastic polyolefin and at least one prodegradant agent. Another object of the invention relates to a composition for use in the manufacture of a cutting member by extrusion/drawing or by injection, made from a mixture of at least a polyamide, at least one thermoplastic polyolefin and at least one prodegradant agent.

Abstract: The invention relates to a coil (2) of cutting wire for a vegetation cutting machine, wherein the wire (20) is coiled on itself so as to form at least two temporarily bonded turns (21) and a central void (22), characterized in that at least a part of the innermost turn of the coil (2) is welded to the most adjacent turn.

Abstract: The invention relates to a coil (2) of cutting wire for a vegetation cutting machine, wherein the wire (20) is coiled on itself about an axis so as to form at least two temporarily bonded turns (21) and a central void (22), characterized in that the surface of the wire portion forming the innermost turn of the coil facing the central void (22) comprises a plurality of grooves (230) creating a succession of protrusions and recesses extending parallel to said axis.

Abstract: The invention relates to a trimmer head comprising: a body to be coupled to a driving shaft of a vegetation cutting machine for rotating about a rotation axis, at least one rod comprising at least one retaining portion for holding a cutting filament in a determined direction, wherein the body comprises a housing for receiving each end of the rod such that the rod axis is perpendicular to the rotation axis of the body and substantially tangential to the rotational path of the body, the housing and the rod ends having respective shapes allowing at least two relative orientations of the rod relative to the body: a first orientation wherein the determined direction is substantially parallel to the rotation axis of the body, and a second orientation wherein the determined direction is substantially radial and substantially perpendicular to the rotation axis of the body.

Abstract: The invention relates to a cutting wire (10) which is intended for a vegetation-cutting or -trimming device. The inventive wire comprises a core (12) which is surrounded by a skin (14). The invention is characterised in that: the core is made from a polyamide or a copolyamide; the skin is made from a polyamide or a copolyamide which is different from that of the core and which has a melting point above that of the core, such as to limit the occurrences of sticking, particularly caused by friction, in relation to the normal occurrences of sticking produced with the core material; and the outer surface of the skin is smooth. The risks of sticking and, in particular, of one wire sticking to another wire, under the effect of heating of different origins, regardless of whether the wire is in a coil or in strands, are significantly reduced or even eliminated without disturbing the production process or altering the performances of the wire.

Abstract: The invention relates to a trimmer head for a vegetation cutting machine, comprising: a body (1) adapted to be coupled to a driving shaft of the vegetation cutting machine so as to cause said body to rotate about a rotation axis (X), at least one rod (12) comprising at least one retaining portion intended to hold a cutting filament in a determined direction, wherein the body (1) comprises a housing for receiving each end (122, 123) of said rod (12) such that the rod axis (Y) is perpendicular to the rotation axis (X) of the body (1) and substantially tangential to the rotational path of the body (1), said housing and said ends of the rod being having respective shapes allowing at least two relative orientations of the rod with respect to the body: (i) a first orientation wherein the determined direction of the filament is substantially parallel to the rotation axis (X) of the body, and (ii) a second orientation wherein the determined direction of the filament is substantially radial and substantially pe

Abstract: The invention relates to a cutting monofilament (1) for a vegetation cutting machine such as a brush cutter or an edge trimmer, having a cross-section comprising at least two portions (10, 11, 12) made of thermoplastic materials having different mechanical properties, said cross-section being constant along a longitudinal axis (X) of the monofilament, wherein each of said portions (10, 11, 12) has a continuously varying position along said longitudinal axis of the monofilament and the arrangement of each portion relative to the cross-section is constant along said longitudinal axis. The invention also relates to a process of manufacturing monofilament, comprising drawing the monofilament from a rotating extrusion head.

Abstract: The invention relates to a cutting head (1) for a vegetation cutting machine, such as a border trimmer or a brush cutter, designed to accommodate a coil (2) consisting of a plurality of temporarily bonded turns (21) of at least one cutting filament (20) and exhibiting a central void (22), said cutting head including: a body (10) defining an inner recess (11) for the coil (2) and provided with a peripheral opening (12) for the emergence of a cutting filament separated from the coil, and capable of being driven in rotation by a motor, a central mandrel (13) adapted to support said at least one coil, said mandrel comprising at least one arrangement adapted to cooperate with the coil so as to provide for rotational engagement between the mandrel (13) and the coil (2), the mandrel (13) being able to selectively rotate relative to the body (10).

Abstract: A trimmer line may have a protrusion that is receivable in a recess to maintain the trimmer line in a coiled condition without packaging.

Abstract: The invention concerns a cutting wire (1) for plant-cutting equipment, such as an edger or a brush cutter, the wire (1) being profiled and adapted to be coiled on itself so as to form a reel (B) comprising at least two turns S), characterised in that the wire (1) comprises reciprocal holding arrangements (10, 20) so that each turn (S) cooperates with at least one adjacent turn (S) so as to hold it mechanically, so that the reel (B) is self-supporting.

Abstract: The invention relates to a cutting head for a brush cutter, edge trimmer or similar, the head being of the type including at least a passageway for a cutting string and a locking element of the cutting string. The cutting head is characterized in that the locking elements include at least one ratchet wheel, including a toothed wheel mounted in rotation around an axis in such a manner that said teeth project in the passageway. The ratchet can be arranged in such a way that the toothed wheel can turn in a given direction to allow the introduction of the cutting string in the passageway and cannot turn in the opposite direction, thereby locking the cutting string in the passageway.

Abstract: The present invention relates to a cutting member, especially to a cutting filament, for a plant-cutting device such as a scrub cutter or edge trimmer wherein at least one portion of the cutting member is a mixture of at least a polyamide, at least one thermoplastic polyolefin and at least one prodegradant agent. Another object of the invention relates to a composition for use in the manufacture of a cutting member by extrusion/drawing or by injection, made from a mixture of at least a polyamide, at least one thermoplastic polyolefin and at least one prodegradant agent.

Abstract: The present invention relates to a cutting member, especially to a cutting filament, for a plant-cutting device such as a scrub cutter or edge trimmer characterized in that at least one portion of the cutting member is a mixture of at least a polyamide and at least one another thermoplastic material. Another object of the invention relates to a composition for use in the manufacture of a cutting member by extrusion/drawing or by injection, characterized it is made from a mixture of at least a polyamide and at least one another thermoplastic material.

Abstract: The invention relates to a method for the production of a cutting filament for a device used to cut vegetation such as a trimmer or border cutter. The filament is made of a synthetic material having extended molecular chains. According to the invention, (a) the filament is brought to a controlled viscous state, (b) the filament is stretched according to the length thereof in order to perform a first longitudinal molecular orientation, (c) a cross-sectional change, resulting in a partial reorientation of molecular chains in a transversal direction, is imposed upon the filament, whereupon filaments having multiple molecular orientations are produced, having improved mechanical properties (e.g. a better resistance to tearing).

Abstract: The invention relates to a cutting head for a brush cutter, edge trimmer or similar, the head being of the type including at least a passageway for a cutting string and a locking element of the cutting string. The cutting head is characterized in that the locking elements include at least one ratchet wheel, including a toothed wheel mounted in rotation around an axis in such a manner that said teeth project in the passageway. The ratchet can be arranged in such a way that the toothed wheel can turn in a given direction to allow the introduction of the cutting string in the passageway and cannot turn in the opposite direction, thereby locking the cutting string in the passageway.

Abstract: The invention relates to a cutting wire (2) which is designed to trim or cut vegetation and which can be used on rotating head devices, such as brush cutters and edge trimmers. The external surface of the cutting wire is provided with tooth-type (5) or similar formations along the length of said wire (2). In the case of a wire having one or more longitudinal cutting edges (4), said tooth-type formations (5) are disposed on the cutting edge(s) along the length of each edge (4). In this way, the sharpness of the wire (2) is improved.

Abstract: A cutting head for a brush cutter, edge trimmer or similar, the head comprises a passageway (112) for a cutter string (300) and at least one curved surface (120) for supporting the string, the surface extending between an exit region (115) for said string from said passageway and a peripheral region of the head. According to the invention, the passageway extends (A) in a manner that is offset from an axis of rotation (C) of the head so as to present an inside edge constituted by its edge closest to said axis of rotation, said inner edge corresponding to a trailing edge of the string while the head is rotating, and the curved portion extends from said inner edge. This serves to reduce the radius of curvature of the curved portion without needing to increase the diameter of the head.

Abstract: A cutting unit for a plant or vegetation cutting device and which comprises a rotary cutting head and at least one cutting filament extending radially from the head. The filament has a cutting edge which is defined by two intersecting faces, and the filament is retained by the cutting head in an angular position wherein the cutting edge constitutes the leading edge that engages the plants during operation of the cutting unit. The filament may have a primary or preferred bending plane, and the filament is held in a configuration wherein the filament is bent essentially in the primary bending plane. Also, the localized working zone may be formed of a material which is different from the material of the remainder of the filament.