A material reduction machine includes a prime mover driving a cutting mechanism. A drive system receives a signal to initiate rotation of a cutting mechanism. A sensor senses a machine load parameter and reports a signal to a controller operatively coupled to the clutch to control sequential engagement cycles from the engine to the cutting mechanism. The controller utilizes a stored first disengagement threshold value for stopping a first engagement cycle and continues monitoring the signal as the machine load parameter increases momentarily after reaching the first disengagement threshold. The controller determines and adopts a second disengagement threshold value based on observation of the machine load parameter indicative of maximum load during the continued monitoring after the first disengagement threshold is realized, and further being based on a stored correction factor. The second disengagement threshold value is used for a second engagement cycle.

A material reduction machine includes a prime mover driving a cutting mechanism. A drive system receives a signal to initiate rotation of a cutting mechanism. A sensor senses a machine load parameter and reports a signal to a controller operatively coupled to the clutch to control sequential engagement cycles from the engine to the cutting mechanism. The controller utilizes a stored first disengagement threshold value for stopping a first engagement cycle and continues monitoring the signal as the machine load parameter increases momentarily after reaching the first disengagement threshold. The controller determines and adopts a second disengagement threshold value based on observation of the machine load parameter indicative of maximum load during the continued monitoring after the first disengagement threshold is realized, and further being based on a stored correction factor. The second disengagement threshold value is used for a second engagement cycle.

A rotary processing device that processes a processing object inside a drum and suppresses scattering of particles is described. The rotary processing device includes a drum including a feeding unit for the processing object on one side and a discharge unit for the processing object on the other side and a processor that is connected to a rotation axis member, rotates about a rotation axis of the rotation axis member, and processes the processing object in the drum. The rotary processing device also includes a suppressor that suppresses a gas flow from the other side toward the one side in the drum.

A rotary processing device that processes a processing object inside a drum and suppresses scattering of particles is described. The rotary processing device includes a drum including a feeding unit for the processing object on one side and a discharge unit for the processing object on the other side and a processor that is connected to a rotation axis member, rotates about a rotation axis of the rotation axis member, and processes the processing object in the drum. The rotary processing device also includes a suppressor that suppresses a gas flow from the other side toward the one side in the drum.

Provided are methods and apparatus for crushing clay, transporting clay, and processing clay. In examples, provided are movable truss conveyor support apparatuses, movable crusher picker apparatuses, picker shaft rakes to clean picker shafts, adjustable hoppers, and tracked crushers. In an example, provided is a crusher including (i) a crusher frame, (ii) a crusher subframe movably suspended from the crusher frame, (ii) a rotary bearing fastened to the crusher subframe, (iv) a rotatable picker shaft rotatably supported by the rotary bearing and adapted to rotate relative to the crusher subframe, and (v) at least one picker fastened to the rotatable picker shaft.

Provided are methods and apparatus for crushing clay, transporting clay, and processing clay. In examples, provided are movable truss conveyor support apparatuses, movable crusher picker apparatuses, picker shaft rakes to clean picker shafts, adjustable hoppers, and tracked crushers. In an example, provided is a crusher including (i) a crusher frame, (ii) a crusher subframe movably suspended from the crusher frame, (ii) a rotary bearing fastened to the crusher subframe, (iv) a rotatable picker shaft rotatably supported by the rotary bearing and adapted to rotate relative to the crusher subframe, and (v) at least one picker fastened to the rotatable picker shaft.

An impact crusher is provided which comprises a frame defining a crushing chamber, a rotor provided with at least one hammer, at least one impact apron plate, and a rotor positioning device configured to adjust a rotational position of the rotor. The rotor positioning device comprises a piston motor coupled to the rotor and having a cylinder block comprising a plurality of cylinders; a plurality of pistons, a respective piston being slidably mounted in a respective cylinder; and a surface against which the pistons are configured to exert a force. The cylinder block and the surface are arranged for relative rotation, and the cylinder block or the surface is operatively coupled to the rotor, such that relative rotation of the cylinder block and the surface causes rotation of the rotor. The rotor positioning device is operable in first and second modes.

An impact crusher is provided which comprises a frame defining a crushing chamber, a rotor provided with at least one hammer, at least one impact apron plate, and a rotor positioning device configured to adjust a rotational position of the rotor. The rotor positioning device comprises a piston motor coupled to the rotor and having a cylinder block comprising a plurality of cylinders; a plurality of pistons, a respective piston being slidably mounted in a respective cylinder; and a surface against which the pistons are configured to exert a force. The cylinder block and the surface are arranged for relative rotation, and the cylinder block or the surface is operatively coupled to the rotor, such that relative rotation of the cylinder block and the surface causes rotation of the rotor. The rotor positioning device is operable in first and second modes.

A waste grinding apparatus (101) including a rotor having a central body (13) defining at least one radial vane (15a, 15b), provided, at its end (17a,17b) distal relative to a rotation axis (“S”) of the rotor (11), with a hammerhead (19) in which a first, knocker impact surface (21) adapted to operate when the rotor (11) rotates in a first, clockwise or counter-clockwise direction, and a second, wedge-shaped impact surface (23) adapted to operate when the rotor (11) rotates in a second direction opposite to the first direction, are defined.

A waste grinding apparatus (101) including a rotor having a central body (13) defining at least one radial vane (15a, 15b), provided, at its end (17a,17b) distal relative to a rotation axis (“S”) of the rotor (11), with a hammerhead (19) in which a first, knocker impact surface (21) adapted to operate when the rotor (11) rotates in a first, clockwise or counter-clockwise direction, and a second, wedge-shaped impact surface (23) adapted to operate when the rotor (11) rotates in a second direction opposite to the first direction, are defined.