Abstract: The invention relates to an adjustable hoeing device (10) for removing weeds situated on a ground surface, the hoeing device (10) having a supporting frame (50), on which there is arranged at least one hoeing unit (100), which hoeing unit comprises the following:—at least one main bar (200) and at least two transverse bars (250) arranged parallel to one another, which transverse bars (250) are each mounted rotatably on the at least one main bar (200);—at least two connection bars (300), which run parallel to the at least one main bar (200) and which mechanically connect the at least two transverse bars (250) to one another;—at least two blades (500), wherein the blades (500) are arranged on the at least two transverse bars (250) at a normal distance from the main bar (200); and—at least one actuation device (400), which acts on at least two transverse bars (250) or a transverse bar (250) and the main bar (200) in order to rotate same by means of a linearly displaceable actuation arm.

Abstract: The invention relates to an adjustable hoeing device (10) for removing weeds situated on a ground surface, the hoeing device (10) having a supporting frame (50), on which there is arranged at least one hoeing unit (100), which hoeing unit comprises the following:—at least one main bar (200) and at least two transverse bars (250) arranged parallel to one another, which transverse bars (250) are each mounted rotatably on the at least one main bar (200);—at least two connection bars (300), which run parallel to the at least one main bar (200) and which mechanically connect the at least two transverse bars (250) to one another;—at least two blades (500), wherein the blades (500) are arranged on the at least two transverse bars (250) at a normal distance from the main bar (200); and—at least one actuation device (400), which acts on at least two transverse bars (250) or a transverse bar (250) and the main bar (200) in order to rotate same by means of a linearly displaceable actuation arm.

Abstract: The invention relates to a sprocket assembly for mounting on a driver of a rear wheel hub of a bicycle. By means of a threaded element, a sprocket cluster and a separately embodied ring element are axially clamped together, and a rotation-coupling device is provided between the sprocket cluster and the ring element. Knurled teeth features on the threaded element and ring element prevent the loosening of the threaded element. Through the separate embodiment of the ring element and sprocket cluster, the respective most suitable manufacturing methods can be used for the two parts and, in the event that the sprocket cluster is manufactured by means of machining methods, the knurled features on the ring element can also be produced in a cost-effective and precise manner through shaping methods.

Abstract: The invention relates to a sprocket assembly for mounting on a driver of a rear wheel hub of a bicycle. By means of a threaded element, a sprocket cluster and a separately embodied ring element are axially clamped together, and a rotation-coupling device is provided between the sprocket cluster and the ring element. Knurled teeth features on the threaded element and ring element prevent the loosening of the threaded element. Through the separate embodiment of the ring element and sprocket cluster, the respective most suitable manufacturing methods can be used for the two parts and, in the event that the sprocket cluster is manufactured by means of machining methods, the knurled features on the ring element can also be produced in a cost-effective and precise manner through shaping methods.