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.

An apparatus includes a vibratory separator having a frame and a screen, a lift housing disposed proximate the vibratory separator, and a lift system disposed in the lift housing and configured to selectively engage a portion of the vibratory separator to lift the portion of the vibratory separator. A method includes actuating an actuator and vertically extending a lifting member, contacting an alignment device coupled to the lifting member with a corresponding alignment device coupled to a portion of a vibratory separator, and raising the portion of the vibratory separator to provide access to a screen of the vibratory separator.

An impulse mechanism for use with a vibratory screen includes a rotatable shaft having exposed opposing ends terminating outside the vibratory screen, a stationary spindle surrounding the opposing ends of the shaft, and vibration generators located on each of the opposing ends of the shaft that generate vibrations when the shaft is rotated. Each vibration generator includes a bearing housing that rotates with the shaft, an exposed mass component mounted to the bearing housing is accessible from outside the bearing housing and rotates about the shaft to generate vibrations, and a bearing assembly located within the bearing housing transmits vibrations from the rotating mass component to the vibratory screen assembly.

A spring assembly includes a resilient member having a first and second end shanks and a central helical portion. The first end shank extends in a first direction from the central helical portion, and has a longitudinal axis from a proximal end to a distal end. The second end shank extends in a second, opposite direction from the central helical portion, and has a longitudinal axis from a proximal end to a distal end. The central helical portion includes one or more coils disposed about a central longitudinal axis, and has a first end attached to the proximal end of the first end shank and a second end attached to the proximal end of the second end shank. The axes of the shank ends and the axis of the central helical portion are parallel or are collinear. The assembly also includes an attachment site at each of the end shanks.

A resin tapping member used for a method of separating and recovering that enables a polymer to be separated and recovered from a polymer-containing liquid during or after a polymerization reaction at a high quality, high efficiency, and high processing capacity. The resin tapping member for preventing clogging of a screen is used in separating and recovering a polymer obtained by a polymerization reaction in a solvent. The resin tapping member has a weight reduction percentage of 3 wt. % or less after continuous separating and recovering of a polymer from a polymer-containing liquid for 48 hours.

A modular exciter beam fitted to a vibratory screen assembly. The exciter beam spans between opposing side walls of the screen assembly. The modular exciter beam provides mounting for a pair of exciter mechanisms which are located substantially inside the side walls of the screen assembly.

A motovibrator with continuous adjustment of the angular offset of the eccentric masses includes a substantially box containment body which accommodates electric motor elements which have a stator that is integral with the body and a rotor for the rotational actuation of a shaft about its own longitudinal axis. The opposite ends of the shaft protrude from the body and are each associated with at least one respective eccentric mass. The shaft includes a main section and a secondary section mutually aligned along the longitudinal axis, the main section being actuated rotationally directly by the rotor, and are coupled rotationally by interposition of transmission elements.

An impulse mechanism for a vibratory device includes an eccentrically weighted shaft that is adapted to be rotated to create vibratory forces. A fan component is mounted on the eccentrically weighted shaft. The fan component has a plurality of fan blades spaced around its periphery.

A single shaft material processing vibrating screen is described which provides for non-circular acceleration (elliptical and otherwise). The system includes a main eccentric is rotated a first direction and a secondary eccentric orbits the main eccentric in an opposite direction.

The orbiting is accomplished by either long and short arms or by eccentric flywheels. The size and shape of elliptical/non-circular motion is adjustable by varying mass of main and secondary eccentrics, length of long and short arms or the size of eccentric flywheels.

A vibratory system for a screening and/or feeder machine, the vibratory system including shaft lines, each shaft line having an unbalance module, the vibratory system also having a drive device configured to drive the shaft lines in rotation in synchronous manner and in the same direction. The vibratory system also includes an angle modifier device configured to modify the angular position of the unbalance module of one shaft line relative to the angular position of the unbalance module of the other shaft line or of one of the other shaft lines.