The present invention relates to a vibration tamper, comprising a superstructure having a driving engine mounted on a machine frame and further having a guide bar, and further comprising a substructure having a compactor base driven by the driving engine and having a compactor plate and having a drive line, by means of which a drive connection between the driving engine and the compactor base is established such that the compactor base can move relatively to the superstructure along a compactor axis while executing at least one compacting amplitude. The driving engine of the vibration tamper is a liquid gas powered driving engine, wherein the superstructure and, more particularly, the guide bar on the superstructure, comprises a storage container for liquid gas, and wherein a gas supply line is provided to supply evaporated liquid gas to the driving engine.

A hand-guided ground compacting machine, such as, in particular, a vibration tamper, a vibratory roller or a vibratory plate, comprising a driving engine mounted on a machine frame, a ground compaction device driven by the driving engine, and a guide bar. Features of the present invention reside in that the driving engine is a liquid gas powered driving engine and that the ground compacting machine comprises at least one storage container for liquid gas which is replaceably disposed in a storage container holding means on the hand-guided ground compacting machine.

A hand-guided ground compacting machine, such as, in particular, a vibration tamper, a vibratory roller or a vibratory plate, comprising a driving engine mounted on a machine frame, a ground compaction device driven by the driving engine, and a guide bar. Features of the present invention reside in that the driving engine is a liquid gas powered driving engine and that the ground compacting machine comprises at least one storage container for liquid gas which is replaceably disposed in a storage container holding means on the hand-guided ground compacting machine.

A vibration assembly is configured to be engageable with a concrete working tool through engagement of complementary or interengaging interface components. A variety of interface components can be used, and in some examples, the engagement between the interface components is placed under tension.

A vibration assembly is configured to be engageable with a concrete working tool through engagement of complementary or interengaging interface components. A variety of interface components can be used, and in some examples, the engagement between the interface components is placed under tension.

Embodiments of the present disclosure include a remotely-operable percussion compactor comprising: a primary power source; a plurality of electric motors coupled to the primary power source and attached to the compactor body; a plurality of reaction wheels coupled to respective electric motors; an inertial measurement unit (IMU); a remote control interface; and a controller configured to: receive one or more commands from the remote-control interface and a feedback signal from the IMU, and set a desired operating condition for at least one of the electric motors based on at least one of the feedback signal and the one or more commands. In some embodiments, the controller can be configured to determine an angular disturbance relative to at least one rotational axis of the compactor; and set the desired operating condition for one or more electric motors to generate a reactive force to at least partially counteract the angular disturbance.

Embodiments of the present disclosure include a remotely-operable percussion compactor comprising: a primary power source; a plurality of electric motors coupled to the primary power source and attached to the compactor body; a plurality of reaction wheels coupled to respective electric motors; an inertial measurement unit (IMU); a remote control interface; and a controller configured to: receive one or more commands from the remote-control interface and a feedback signal from the IMU, and set a desired operating condition for at least one of the electric motors based on at least one of the feedback signal and the one or more commands. In some embodiments, the controller can be configured to determine an angular disturbance relative to at least one rotational axis of the compactor; and set the desired operating condition for one or more electric motors to generate a reactive force to at least partially counteract the angular disturbance.

A concrete float, float assembly, float adapter and interface, and float vibration apparatus and methods are described. A concrete float has improved surfaces, and structures for controlling flow of wet concrete. An interface such as may be included in a quick attach/release configuration may be integrated on a float, and/or may be added onto a float for quick attach/release of a pivot assembly. Adapters may ease attachment or release of an assembly, and may be an interengaging element, such as a sliding dovetail as an interengaging element, or an adapter may be used to place an assembly in tension to secure the assembly. A vibration assembly may be included and configured to have a low center of mass, can have a user display, an accelerometer, and/or other components. A pivot assembly may be included for easier use by an operator, and may include a user display, quick release mechanisms.

A concrete float, float assembly, float adapter and interface, and float vibration apparatus and methods are described. A concrete float has improved surfaces, and structures for controlling flow of wet concrete. An interface such as may be included in a quick attach/release configuration may be integrated on a float, and/or may be added onto a float for quick attach/release of a pivot assembly. Adapters may ease attachment or release of an assembly, and may be an interengaging element, such as a sliding dovetail as an interengaging element, or an adapter may be used to place an assembly in tension to secure the assembly. A vibration assembly may be included and configured to have a low center of mass, can have a user display, an accelerometer, and/or other components. A pivot assembly may be included for easier use by an operator, and may include a user display, quick release mechanisms.