The invention relates to a decoring machine (1) for decoring cast workpieces (2). The decoring machine (1) comprises: a machine frame (3); a machine table (6), which is coupled to the machine frame (3) by means of a mounting bracket (7); a first eccentric mass (10), which is mounted in a rotatable manner on the machine table (6); a second eccentric mass (12), which is mounted in a rotatable manner on the machine table (6), wherein the second eccentric mass (12) is driven in the opposite direction to the first eccentric mass (10); a workpiece carrier (21) for receiving the cast workpiece (2) to be decored, wherein the workpiece carrier (21) is coupled to the machine table (6) by means of a rotary mounting (22), wherein the rotary mounting (22) is configured in such a way that the workpiece carrier (21) is mounted so as to be rotatable about a horizontal axis of rotation (23) relative to the machine table (6).

A sealed disposable concrete vibrator assembly includes a hollow cylindrical main housing enclosing a shaft having an eccentric mid portion sized to rotate therewithin. Sealed bearings supporting the shaft are encased within an adaptor housing and a tip cover attached concentrically to proximal and distal ends, respectively, of the main housing. Outer surfaces of the adaptor housing and tip cover protrude into the main housing for frictional engagement therewith, while inner surfaces thereof provide channels to encase the bearings. An oil seal compressed against a flange integral to the adaptor housing prevents intrusion of contaminants. A circumvolving adaptor is coupled through the oil seal to the driven end of the shaft. The assembly may be hermetically sealed by permanent attachment of the adaptor housing and tip assembly to the main housing.

A sealed disposable concrete vibrator assembly includes a hollow cylindrical main housing enclosing a shaft having an eccentric mid portion sized to rotate therewithin. Sealed bearings supporting the shaft are encased within an adaptor housing and a tip cover attached concentrically to proximal and distal ends, respectively, of the main housing. Outer surfaces of the adaptor housing and tip cover protrude into the main housing for frictional engagement therewith, while inner surfaces thereof provide channels to encase the bearings. An oil seal compressed against a flange integral to the adaptor housing prevents intrusion of contaminants. A circumvolving adaptor is coupled through the oil seal to the driven end of the shaft. The assembly may be hermetically sealed by permanent attachment of the adaptor housing and tip assembly to the main housing.

An electronic apparatus is configured to generate a variety of vibrations corresponding to a variety of different situations without excessively high power consumption. The electronic apparatus has first and second vibration motors having respective eccentric weights different in weight from each other for generating different first and second vibrations. An input/output section enables a user to select from a list of events stored in a storage section first events and second events. A controller drives the first vibration motor having a heavier weight with a strong vibration upon occurrence of the user-selected first events and drives the second vibration motor having a lighter weight with a weak vibration upon occurrence of the user-selected second events. The first events include an incoming phone call or email, a present alarm time, and a dynamic or important action, motion, and so on in a computer game. The second events include confirming input operations by the user, and a minute action, motion, and so on occurring in a computer game. The correspondence between the vibration motors and the events is selectable by the user.

A haptic actuator includes mechanical links defining a first j-trajectory and mechanical links defining a second j-trajectory as well as a motor coupled to the mechanical links so as to synchronously accelerate a first mass over the first J-trajectory and a second mass over the second J-trajectory. During a first time interval, reactive forces of the first mass accelerating substantially balance reactive forces of the second mass accelerating and during a second time interval reactive forces of the first mass accelerating do not substantially balance reactive forces of the second mass accelerating. This un-balanced condition results in a tap signal being produced.

A haptic actuator includes mechanical links defining a first j-trajectory and mechanical links defining a second j-trajectory as well as a motor coupled to the mechanical links so as to synchronously accelerate a first mass over the first J-trajectory and a second mass over the second J-trajectory. During a first time interval, reactive forces of the first mass accelerating substantially balance reactive forces of the second mass accelerating and during a second time interval reactive forces of the first mass accelerating do not substantially balance reactive forces of the second mass accelerating. This un-balanced condition results in a tap signal being produced.

A hand-held power tool has a lower mass and an upper mass. The lower mass has a tool and a working device for causing the tool to effect a work movement. The upper mass is movable relative to the lower mass and has a drive motor for the working device. A first vibration decoupling device is arranged between the lower mass and the upper mass for decoupling the upper mass from the lower mass in terms of vibration. A guide drawbar guides is provided for guiding the work tool by an operator. An electrical energy storage provides electrical energy for starting the drive motor. A drawbar carrier is carried by the upper mass and is connected to the upper mass via a second vibration decoupling device. The the guide drawbar is attached to the drawbar carrier, and the energy storage is carried by the drawbar carrier.

A tamping unit for tamping a track has tamping tines which are designed for immersion into a ballast bed and which can be set in vibrations by a vibration drive. The vibration drive includes a housing in which a shaft including an eccentric is arranged for rotation about a shaft axis. A transmission element for transmitting a vibratory motion is mounted on the eccentric. The eccentric is connected to the shaft in a rotation-locked and radially displaceable manner, wherein the position of the eccentric relative to the shaft is adjustable in radial direction by an adjustment device. Thus, while retaining the advantages of an eccentric drive, it is possible to adjust vibration parameters during operation.

An oscillation module for a compacting roller of a soil compactor includes a plate-like carrier, at least two oscillation mass units supported on the carrier at a distance from one another, and an oscillation drive motor supported on the carrier. The carrier has a connection formation for firmly connecting the carrier to a carrier structure of a compacting roller. Each oscillation mass unit includes an imbalance mass rotatably supported on the carrier about an oscillation axis of rotation. Each imbalance mass of each oscillation mass unit can be driven by the oscillation drive motor for rotation about the respectively assigned oscillation axis of rotation.

A vibrator assembly includes a housing defining a longitudinal central axis and a rotor in the housing and spaced apart from the central axis. The rotor defines a longitudinal rotational axis that is parallel to the central axis. The rotor is configured to rotate about the rotational axis and, in response, to rotate about the central axis.