An operation monitoring system for a sifting device includes: movement state sensing means to be provided for a sieve frame of the sifting device that rotationally oscillates, and capable of sensing a movement state of the sieve frame; and operation monitoring means capable of monitoring an operation state of the sifting device based on measured data transmitted from the movement state sensing means. The operation monitoring means includes a measured data arithmetic processing unit that subjects the measured data to arithmetic processing, and a movement state display unit capable of displaying the movement state of the sieve frame based on arithmetic processing data obtained by the measured data arithmetic processing unit.

A screening machine having a machine frame that is mounted so as to be capable of vibration and is capable of being set into vibration, and having screening elements configured in a row in or on the machine frame, seen in the longitudinal direction of the screening machine. The screening machine is subdivided into a plurality of screening machine parts that are connectable or capable of being assembled to form the screening machine. An individual screening machine part or one or more stacks of a plurality of screening machine parts stacked one over the other have dimensions that are smaller in their length, width, and height than the corresponding dimensions of the interior of a commonly used standard transport container or than dimensions requiring special transport due to excess size.

A vibratory screen assembly includes a rigid frame having a pair of parallel side members that are spaced apart such that a space is provided between them. A tappet assembly extending horizontally across the space between the side members includes a horizontal member having opposing ends secured to the frame. A screen placed over the tappet assembly provides a screening medium having a mesh size. A vibrator motor is located at each of the opposing ends of the horizontal member to form a cooperative pair of vibrator motors that induce vibrations in the horizontal member and in the screen. As the screen vibrates, aggregate material that is smaller than the mesh size passes through the screening medium and aggregate material that is larger than the mesh size does not pass through the screening medium.

The invention discloses a double vibration source square oscillating sieve, comprising a support frame, a sieve body, connecting rods and a vibration exciter; the sieve body is slantwise provided in the support frame, the front side and back side of the sieve body are both provided with the connecting rods, and two ends of the connecting rods are connected with the upper part of the support frame and the lower part of the sieve body by a cross universal joint; the vibration exciter is fixedly provided on any position of the upper end, the lower end and the middle part of the sieve body, and the sieve body is provided with a motor which is connected with the vibration exciter by a belt; the vibration exciter comprises a fixed housing, a gear portion, first vibration excitation assemblies and second vibration excitation assemblies which are connected with the gear portion.

A lock assembly for a vibratory separator includes a latch. The latch includes a first inner protrusion and a first outer protrusion. The first outer protrusion defines a first outer protrusion opening. The lock assembly also includes a first spacer. The first spacer includes a first fastener that is configured to be inserted into the first outer protrusion opening.

A vibration generating mechanism for a screen box includes a drive shaft arranged to be rotatably driven by a drive motor, at least one first eccentric out-of-balance weight fixed with respect to the drive shaft for rotation therewith and at least one second eccentric out-of-balance weight coupled to the drive shaft via gearing. The first and second out-of-balance weights rotate in opposite directions when driven by the drive shaft.

Vibratory classifier apparatus are provided, e.g., for classification of materials such as wet or dry aggregate materials. In some embodiments a drive system of the classifier includes a spindle with one or more blind holes in a collar thereof. In some embodiments a drive system of the classifier includes a bearing cover having a self-centering portion. In some embodiments a drive system of the classifier includes a spindle an annular portion for receiving a seal.

A vibration generating mechanism for a screen box includes a drive shaft arranged to be rotatably driven by a drive motor, at least one first eccentric out-of-balance weight fixed with respect to the drive shaft for rotation therewith and at least one second eccentric out-of-balance weight coupled to the drive shaft via gearing. The first and second out-of-balance weights rotate in opposite directions when driven by the drive shaft.

A screening machine having a machine frame that is mounted so as to be capable of vibration and is capable of being set into vibration, and having screening elements configured in a row in or on the machine frame, seen in the longitudinal direction of the screening machine. The screening machine is subdivided into a plurality of screening machine parts that are connectable or capable of being assembled to form the screening machine. An individual screening machine part or one or more stacks of a plurality of screening machine parts stacked one over the other have dimensions that are smaller in their length, width, and height than the corresponding dimensions of the interior of a commonly used standard transport container or than dimensions requiring special transport due to excess size.

A system and method for a vacuum driven separating device is disclosed.