A cutter unit for a rotating tilling machine comprises a coupling flange connected to a rotor, a first blade and a second blade that comprises a respective operating portion and a respective coupling portion. The cutter unit further comprises a housing seat for the bladed. The coupling portion of the first blade comprises an opening suitable for housing a locking element for locking said first blade in a direction of extraction of the blades from the housing seat and the blades comprise a respective shaped portion arranged one after the other along the direction of extraction of the blades.

A method for a cylindrical device includes semi-helically oriented teeth, knives, or blades radially outward from an outer surface of the cylindrical device or rotor is provided. Each tooth, knife, or blade is part of a row of teeth, knives, or blades. Each row is oriented with an offset angle such that the spirally orientation completes angular offset of about 90? or less. The knives may have sharpened edges that are oriented to cut on different planes as the cylindrical device rotates. The knives may be held in place by holders that have configurations to oriented the knives at certain angles.

A land preparation tool includes a tool body having a cutting surface, a mounting surface, an opening, and a channel. The cutting surface has a blade positioned at a distal end thereof. The mounting surface has a non-planar profile and is disposed on the tool body opposite the cutting surface. The opening is disposed on the mounting surface and the channel extends from the opening at least partially into the tool body. Other embodiments are described and claimed.

A land preparation tool includes a tool body having a longitudinal axis; a cutting surface having a distal end and a blade positioned at the distal end; a mounting surface disposed on the tool body opposite the cutting surface, the mounting surface having an apex extending along about half of the mounting surface parallel to the longitudinal axis, a first mounting surface extending from the apex, a second mounting surface extending from the apex, and an opening disposed on the mounting surface; and a channel extending from the opening only partially into the tool body

This invention provides an oblique submerged reverse deep rotary tilling device, which includes a stander, a mounted frame, a gearbox and an oblique blade roller. However, the oblique blade roller is mainly made up of configured rotary blades whose tips bend to the same direction. The angle between the rotary tilling blade roller and the traction speed is 5570 while the rotary blade tips are all toward the right side of the traction speed. Side force balance blades are installed to the left side of the oblique blade roller and used to balance the axial component force of the oblique blade roller. The working pattern of this invention is an oblique submerged reverse rotary tillage method. Therefore, there is no soil restriction on the top of the tilling soil clod. Meanwhile, due to cutting soil configured regularly, the right-side soil has been cut when the rotary tilling blades soil begins tilling. The soil is mainly destroyed by tension. Since rotary blades have axial component speed, tilled soil clods will be destroyed mainly by rightward pulling force applied by rotary blades, and the tilled soil clods are mainly thrown to cultivated land. Thus, the invention can reduce secondary tillage and energy consumption. In addition, the invention can avoid interference among gearbox, bearing seat and untilled soil, so the blade roller can easily sink into the ground to achieve deep tillage.

An agricultural implement having a rolling basket is disclosed. The rolling basket includes a plurality of elongated members arranged in a substantially cylindrical shape. A stationary internal scraper is disposed in the inner chamber of the rolling basket and is adapted for breaking up a material from the inner chamber as the rolling basket is rotated around the major axis of rotation of the rolling basket. The internal scraper extends in an upward direction with respect to the major axis of rotation of the rolling basket with the upper edge of the internal scraper distally spaced away from and above the major axis of rotation of the rolling basket and with the lower edge of the internal scraper distally spaced away from and above the major axis of rotation of the rolling basket. The upper edge of the internal scraper is positioned above the lower edge.

A land clearing attachment for a tractor device includes semi-helically oriented teeth, knives, or blades radially outward from an outer surface of a rotor. Each tooth, knife, or blade is part of a row of independent teeth, knives, or blades. Each row is oriented with an offset angle such that the spirally orientation completes angular offset of about 90? or less. The spiral or helical orientation of the cutting teeth, knives, or blades enables the power to be reduced typically required to effectively rotate a similarly sized rotor.

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 ?.

A land preparation tool includes a tool body having a longitudinal axis; a cutting surface having a distal end and first and second blades positioned at the distal end; a mounting surface disposed on the tool body opposite the cutting surface, the mounting surface having an apex extending along about half of the mounting surface parallel to the longitudinal axis, a first mounting surface extending from the apex, a second mounting surface extending from the apex, and a recess disposed into the mounting surface; and a channel extending from the recess only partially into the tool body.

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.