AMENDED CLAIMS

received by the International Bureau on 19 October 2020 (19.10.2020)

1 . A utensil for agricultural working, comprising a work tool (2), a fastening device (4) and a support element (3) connected to said work tool (2), said work tool (2) comprising at least one shaped area (22, 32) designed to be positioned and reversibly connect with said support element (3) by inserting said fastening device (4) into a hole or opening (5),

wherein said work tool (2) comprises, at said at least one shaped area (22, 32), respective abutment surfaces (60, 61 ) made on opposite parts of said work tool (2) which allow the insertion and accommodation of at least one portion of said fastening device (4) so that said fastening device (4) can slide in said opening (5), passing from a locked position to a released position and vice versa, allowing the locking or releasing, respectively, of said work tool (2) to/from said support element (3), characterized in that said fastening device (4) comprises:

- a head (41 ) and a central body (42), wherein said central body (42) has a larger section with respect to the section of said head (41 );

- a stem (40) connected to said central body (42), wherein said stem (40) has a smaller section with respect to the section of said central body (42), wherein said fastening device (4) remains inserted in said opening (5) both in an assembled position, according to which said work tool (2) is restrained to said support element (3), and in a non-assembled position, according to which said work tool (2) is released from said support element (3), and wherein said head (41 ), in said locked position, abuts on a first of said abutment surfaces (61 ), and wherein said central body (42), in said released position, abuts on a second of said abutment surfaces (60).

2. A utensil for agricultural working according to claim 1 , characterized in that said fastening device (4) is substantially a cylindrical-shaped pin.

3. A utensil for agricultural working according to at least one of the preceding claims, characterized in that said central body (42) comprises a groove (43) inside of which there is accommodated a braking element (50) adapted to interact by interference with said opening (5), thus ensuring coupling solidity between said fastening device (4) and said opening (5).

4. A utensil for agricultural working according to claim 3, characterized in 10 that said braking element (50) is ring- or C-shaped and is made of steel, elastic steel, polymeric or elastomeric material.

5. A utensil for agricultural working according to one of the preceding claims, characterized in that said utensil is a subsoiler or scarifier adapted to break up the more or less deep layers of the soil.

6. A utensil for agricultural working according to at least one of the preceding claims, characterized in that a first of said abutment surfaces (60, 61 ) is slot shaped to allow the insertion and removal of said tool (2) simply by sliding on said support element (3), also when said central body (42) abuts on said first abutment surface (60) and is in a released position.

7. A utensil for agricultural working according to one of the preceding claims, characterized in that at least a second of said abutment surfaces (60, 61 ) is made so as to allow the sliding of said tool (2) only when said head (41 ) of the fastening device (4) does not project from said opening (5), and therefore when said fastening device (4) is in released position.

8. Work tool (2) designed to reversibly connect with a support element (3) of an agricultural utensil by means of a fastening device (4),

wherein said support element (3) is provided with an opening (5) for slidably inserting the fastening device (4),

said fastening device (4) comprising:

- a head (41 ) and a central body (42), having a larger section with respect to the section of said head (41 );

- a stem (40) connected to said central body (42), wherein said stem (40) has a smaller section with respect to the section of said central body (42), characterized in that

said work tool (2) comprises at least one shaped area (22) with an abutment surface (60) overlapping the opening (5) by means of at least one interfering portion at which the central body (42) of the device (4) abuts, thus preventing the complete sliding of the fastening device (4) through the opening (5).