A mechanism comprises a long shaft and a first gear attached to the long shaft, a short shaft and a second gear attached to the short shaft, the second gear meshing with the first gear. A yoke bushing member defining a first aperture and a second aperture that are spaced away from each other a predetermined distance is also provided. The long shaft is disposed in the first aperture of the yoke bushing member and the short shaft is disposed in the second aperture. The long shaft is longer than the short shaft and is stationary.

A fluid pump includes a pump body having a fluid path with an inlet and an outlet. The fluid pump also includes a diaphragm disposed along the fluid path between the inlet and the outlet, a non-return valve to control direction of flow along the fluid path, and a diaphragm actuating unit. The diaphragm actuating unit includes an unbalanced motor. Further, a steam generator may include the fluid pump.

A system, apparatus and method are disclosed. The system includes a command module that generates haptic commands; a haptic actuator; a drive circuit that applies a first driving voltage in response to a first haptic command and applies a second driving voltage in response to a second haptic command. The apparatus includes a haptic actuator; a DC power supply; a first power supply circuit that outputs a first DC voltage; a second power supply circuit that outputs a second DC voltage higher than the first DC voltage; a drive circuit that applies a first driving voltage and a second driving voltage; and a controller that designates an operating mode. The method includes generating a first haptic command and a second haptic command; applying a first driving voltage to a haptic actuator; and applying a second driving voltage to the haptic actuator.

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.

A vibration control system includes: a reception section configured to receive eccentric motor drive data that is included in a program for an application and is for causing vibration of an eccentric motor vibration device; a vibration device for which a resonance frequency is higher than that of the eccentric motor vibration device and whose amplitude and frequency are controllable; and a vibration data generation section configured to generate vibration data for causing vibration of the vibration device based on the received eccentric motor drive data. The vibration data generation section generates the vibration data, which indicates a second waveform having an envelope with a change trend that correlates to a change trend of an envelope of a first waveform indicated by vibration of the eccentric motor vibration device vibrated by the eccentric motor drive data, the second waveform having a higher frequency than the first waveform.

A repetitive moment generating device includes: eccentric weight members provided at shaft bodies in a state where the eccentric weight members intersect the rotatably held shaft bodies and in a state where the eccentric weight members are slidable in a direction that intersects the shaft bodies; sliders that are attached to the shaft bodies in a state where the sliders are slidable in a direction of shaft centers of the shaft bodies and in a state where the shaft bodies are able to idle; link mechanisms that convert sliding motion of the sliders in the directions of the shaft centers into sliding motion in a direction that intersects the shaft bodies and transmit the sliding motion to the eccentric weight members; handle that are operation means for causing the sliders to slide in the directions of the shaft centers of the shaft bodies; and the like.

A vibratory apparatus includes a deck, an exciter, and a controller. The exciter is coupled to the deck. The exciter includes a shaft with at least one mass attached thereto, and a low-slip motor, such as a permanent magnet motor. The shaft is coupled to the deck via one or more resilient members.