Rotor shaft for use in an aerating device for a ground, wherein the rotor shaft comprises at least one connecting disc which extends transversely of the axis of the rotor shaft and on which at least two knives are arranged, wherein each knife is provided with two knife connecting holes and is connected between the connecting disc and a connecting ring, wherein the connecting disc and the connecting ring are provided with knife connecting holes which coincide with the knife connecting holes of the knives, wherein bolts are arranged through the coinciding knife connecting holes in order to connect the connecting disc, the knives and the connecting ring, wherein the connecting ring is constructed from at least two ring sectors which together form the connecting ring.

Rotor shaft (22) for use in an aerating device (1) for a ground, wherein the rotor shaft (22) comprises at least one connecting disc (4) which extends transversely of the axis of the rotor shaft (22) and on which at least two knives (3) are arranged, wherein each knife (3) is provided with two knife connecting holes (33a, 33b) and is connected between the connecting disc (4) and a connecting ring (6), wherein the connecting disc (4) and the connecting ring (6) are provided with knife connecting holes (44, 54) which coincide with the knife connecting holes (33a, 33b) of the knives (3), wherein bolts (74) are arranged through the coinciding knife connecting holes (33a, 33b) in order to connect the connecting disc (4), the knives (3) and the connecting ring (6), wherein the connecting ring (6) is constructed from at least two ring sectors which together form the connecting ring (6).

A flange is disclosed herein for securing a rotary blade to a shaft that includes a solid plate with: an axially oriented shaft hole substantially in the center of the plate; two or more additional blade holes for securing a blade to the flange; an embossment around the shaft hole, providing a profile for stopping blade rotation about the blade hole; and a depression on the back face of the plate opposite the embossment, which provides a welding surface to secure the plate to a shaft passing through the shaft hole. Also disclosed are assemblages that include a flange, such as a blade assembly system for attaching two or more blades to a shaft, a bladed shaft, an attachable farm implement including a bladed shaft, and a powered machine, which includes a bladed shaft.

A method of stacking dethatchers includes pivoting an upper portion of a handle on a first dethatcher toward a front end of a frame on the first dethatcher, upon pivoting the upper portion of the handle toward the front end of the frame, exposing a rear support point defined by a lower portion of the handle, and stacking a second dethatcher on the first dethatcher so that the second dethatcher is supported on the rear support point defined by the lower portion of the handle and a front support point defined by the upper portion of the handle.

An agricultural implement having a rolling basket is disclosed. A stationary blade is disposed inside an inner chamber of the rolling basket and attached at ends of the rolling basket near the bearings that are connected to the rolling basket. The rolling basket rotates around its major axis via the bearings, while the blade is held stationary. The stationary blade has sleeves at the ends, and each of the sleeves is connected to a post of a support arm and locked into the posts via a pin.

A land preparation tool includes a cutting surface having a blade and a mounting interface opposite the cutting surface. The mounting interface of the land preparation tool is configured to detachably connect to a tool holder having a top surface, an end surface, a mounting surface opposite the end surface, and opposing first and second side surfaces extending between the end surface and the mounting surface. The mounting surface has an apex extending downwardly from the top surface and first and second mounting faces. The first mounting face extends inwardly from the first side surface toward the apex and the second mounting face extends inwardly from the second side surface toward the apex.

A land preparation tool includes a cutting surface having a blade and a mounting interface opposite the cutting surface. The mounting interface of the land preparation tool is configured to detachably connect to a tool holder having a top surface, an end surface, a mounting surface opposite the end surface, and opposing first and second side surfaces extending between the end surface and the mounting surface. The mounting surface has an apex extending downwardly from the top surface and first and second mounting faces. The first mounting face extends inwardly from the first side surface toward the apex and the second mounting face extends inwardly from the second side surface toward the apex.

A knife for a cylindrical rotor includes at least two sharpened edges adapted to cut materials during land clearing or mulching. The knife further includes a top surface and a bottom surface wherein the knife is shaped as an inverted frusto-square pyramid. The knife may further include a tapered sidewall defining one sharpened edge. The angle may be about 30 to about 60. The knife may have four sharpened edges. The knife further may include an aperture that may be equidistant from the four sharpened edges. The knife is adapted to be moved when one sharpened edge becomes dull. The knife may further include a conical countersunk aperture. The knife may have a thickness of about to about .