In an apparatus for detecting tip-over of a rammer equipped with a crankcase accommodating an output shaft rotatably connected to an engine, a movable unit accommodating a converter mechanism for converting rotation of the output shaft to vertical motion of a movable member, a tamping shoe connected to the movable unit, and a handle operable by an user, and adapted to thrust upward in the gravitational direction by the vertical motion of the movable member and go into a free fall to compact a ground surface, it is determined whether a detected engine speed becomes equal to or smaller than a threshold value set lower than an engine idling speed when the engine has been operated at a rammer working speed set greater than the engine idling speed, and if it does, it is discriminated that the rammer has tipped over.

In an apparatus for detecting tip-over of a rammer equipped with a crankcase accommodating an output shaft rotatably connected to an engine, a movable unit accommodating a converter mechanism for converting rotation of the output shaft to vertical motion of a movable member, a tamping shoe connected to the movable unit, and a handle operable by an user, and adapted to thrust upward in the gravitational direction by the vertical motion of the movable member and go into a free fall to compact a ground surface, it is determined whether a detected engine speed becomes equal to or smaller than a threshold value set lower than an engine idling speed when the engine has been operated at a rammer working speed set greater than the engine idling speed, and if it does, it is discriminated that the rammer has tipped over.

A remote controlled vibration imparting device for a concrete finishing tool uses a housing having a chamber surrounded by an inner surface of the housing. A vibrator with a support, a rotor with a shaft and weighted body, a motor, and a resilient link between the shaft and the motor is positioned within the housing chamber. The vibrator also includes a resilient band to separate the vibrator from the housing inner surface. First and second adaptors are employed for the housing to be placed between the handle and the terminus of a concrete finishing tool.

An apparatus for steering and driving a concrete screed having a frame and a screed head secured thereto includes a plurality of spaced drive wheels rotatably and pivotably secured to the frame at a plurality of points, and a steering member coupled to one or more of the drive wheels for controlling the directional orientation thereof.

A hydraulic pole tamper with an extended ergonomic handle including a frame and hose clamps to extend the life of the hose by securing the hoses to the frame and to improve the handle, orientation, and usability of the pole tamper. The pole tamper is used to tamp or compact the dirt around a pole which has been set into a hole in the ground to fixedly secure the pole vertically in the ground.

A hydraulic pole tamper with an extended ergonomic handle including a frame and hose clamps to extend the life of the hose by securing the hoses to the frame and to improve the handle, orientation, and usability of the pole tamper. The pole tamper is used to tamp or compact the dirt around a pole which has been set into a hole in the ground to fixedly secure the pole vertically in the ground.

A grading blade for use with a plate compactor and a plate compactor having a grading blade, for use in grading base material when compacting. The grading blade is user movable relative to the plate compactor via a connection to a pivoting handle of the plate compactor or via a separate controller. The grading blade may be configured for use with a laser level and/or for remote control.

An internal combustion engine to electric motor conversion system for a work machine is provided. The electric motor conversion system is sized to substantially conform to a footprint of the internal combustion engine on the work machine. The electric motor conversion system includes an electric motor, a power distribution unit and a connecting bracket. The electric motor is configured for direct mounting on a frame of the work machine. The power distribution unit is separate from and positioned atop the electric motor. The power distribution unit controls operation of the electric motor. The connecting bracket is separate from the electric motor and power distribution unit. The connecting bracket includes a base, first attachment elements extending from a lower surface of the base for attachment to the electric motor, and second attachment elements extending from an upper surface of the base for attachment to the power distribution unit.

The electrical power unit is provided with: a power unit body; an electrical component for driving the power unit body; and a connecting terminal which is disposed at the tip end of an electrically conductive path member extending from the power unit body and connectable to the electrical component. The connecting terminal is provided detachably to an attaching portion of the power unit body.

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.