A vibratory head for a concrete vibrator includes elongate structures suitable for use to consolidate uncured concrete in a horizontal or flat application.

The present invention relates to a method for operating an attachable compactor, an attachable compactor as well as an excavator with an attachable compactor. For a corresponding efficient operation in accordance with the present invention, a display indicates the end of a time interval (required compaction time) that depends on a measured contact force or a parameter corresponding to the contact force.

The present invention relates to a method for operating an attachable compactor, an attachable compactor as well as an excavator with an attachable compactor. For a corresponding efficient operation in accordance with the present invention, a display indicates the end of a time interval (required compaction time) that depends on a measured contact force or a parameter corresponding to the contact force.

A compaction device for compacting a soil region includes at least one vibration unit and/or oscillation unit able to be driven by an electric drive motor. A soil contacting unit comprises at least one soil contacting element in contact with the soil region. The soil contacting unit comprises at least the electric drive motor and the vibration unit and/or the oscillation unit. At least one power supply unit supplies the electric drive motor with electric drive power. At least one electric plug device for releasably and electrically connecting the electric drive motor is provided between the electric drive motor and the power supply unit. At least one fixing device for releasably and mechanically fixing to the power supply unit is provided between the soil contacting element of the soil contacting unit and the power supply unit.

A control apparatus for a soil compacting apparatus which can be driven by a drive motor. The control apparatus includes a running-direction operating element, which is pivotable about a first axis, for predetermining a running direction of the soil compacting apparatus by an operator, and further includes a rotational-speed operating element, which is pivotable about a second axis, for setting a rotational speed of the drive motor. The first axis and the second axis are congruent and form a common pivot axis.

A compactor includes a plate, a frame, an exciter assembly coupled to the plate, and a motor for driving the exciter assembly. The motor is coupled to the exciter assembly by a belt. The compactor further includes a tensioner assembly configured to tension the belt.

A rammer includes: an outer cylinder (31); an inner cylinder (32) slidably contacted with an inside of the outer cylinder (31); a slider (33) connected to a connecting rod (14) and slidably provided in the inner cylinder (32); a first coil spring (34) housed in the upper part of the inner cylinder (32); and a second coil spring (35) housed in the lower part of the inner cylinder (32), wherein the slider (33) is disposed between the first coil spring (34) and the second coil spring (35), wherein a crank shaft has a rotational axis disposed orthogonally to the moving direction, and the first coil spring (34) and the second coil spring (35) have respectively different winding directions to each other.

A rammer includes: an outer cylinder (31); an inner cylinder (32) slidably contacted with an inside of the outer cylinder (31); a slider (33) connected to a connecting rod (14) and slidably provided in the inner cylinder (32); a first coil spring (34) housed in the upper part of the inner cylinder (32); and a second coil spring (35) housed in the lower part of the inner cylinder (32), wherein the slider (33) is disposed between the first coil spring (34) and the second coil spring (35), wherein a crank shaft has a rotational axis disposed orthogonally to the moving direction, and the first coil spring (34) and the second coil spring (35) have respectively different winding directions to each other.

The present invention provides a motor apparatus having a motor, comprising: a fan that is rotatably supported by a shaft member of the motor, and sends, in a centrifugal direction by rotation, gas taken from an axial direction of the shaft member; and a cover member that covers the fan so as to allow the gas sent in the centrifugal direction from the fan to flow along an outer surface of the motor, wherein the cover member has a blowout port that blows out some of the gas sent in the centrifugal direction from the fan in the centrifugal direction to cool an external mechanism of the motor apparatus.

A compactor includes a plate and an electric motor coupled to the plate and configured to impart vibration thereto. The electric motor including a stator and a rotor defining a rotational axis and having a center of mass that is not intersected by the rotational axis.