Systems and methods to provide pressed aggregate-filled cavities for improving ground stiffness and uniformity are disclosed. According to an aspect, a method includes using a mechanism to press into a ground surface in a substantially downward direction to create a concavity. The method also includes substantially or completely filling the concavity with unstabilized or chemically stabilized aggregate, soil, or sand. Further, the method includes using the mechanism to press the aggregate within the concavity to achieve a desired ground stiffness.

A ditch blade assembly includes a frame coupling opposing blades oriented in a V-shape. The blades are configured to scrape the ground or surface matter to distribute that matter into a singular channel and/or smooth the surface of the ground. A roller is included to compact the loose dirt exiting the gap between the blades. One or more weights are included to increase the down pressure on the blades. The blade angle may be adjusted with both a manual and hydraulic operating assembly.

A device for compacting a substrate, comprising an under carriage with a base arranged on the under carriage; a superstructure which is connected to the under carriage so as to transmit a force; a vibration exciter, by means of which at least the base of the undercarriage can be caused to vibrate and a contact plate, which is arranged on the base, said contact plate being arranged on a base lower face facing away from the superstructure such that the contact plate directly contacts the substrate to be compacted during the operation of the device. The contact plate and the base are connected together in a non-destructively releasable manner so as to transmit a force.

A hydraulic control for an attachment on a work vehicle. The attachment is mounted on the chassis of the work vehicle and movable between a first position and a second position. A hydraulic cylinder is operable to power movement of the attachment. A fluid circuit communicates with the hydraulic cylinder and is configured to carry hydraulic fluid. A fluid reservoir is in communication with the fluid circuit. Accumulators that are in communication with the fluid circuit automatically store and release hydraulic fluid in response to movement of the attachment. A valve assembly controls fluid communication between the fluid reservoir and the fluid circuit in response to movement of the attachment to its second position.

Systems and methods to provide pressed aggregate-filled cavities for improving ground stiffness and uniformity are disclosed. According to an aspect, a method includes using a mechanism to press into a ground surface in a substantially downward direction to create a concavity. The method also includes substantially or completely filling the concavity with unstabilized or chemically stabilized aggregate, soil, or sand. Further, the method includes using the mechanism to press the aggregate within the concavity to achieve a desired ground stiffness.

The present invention relates to an apparatus for laying a pipe in a trench, the apparatus comprising a placement assembly (2) for placing the pipe in the trench; a compactor mechanism (3) for compacting of the aggregate about the pipe.

A hydraulic control for an attachment on a work vehicle. The attachment is mounted on the chassis of the work vehicle and movable between a first position and a second position. A hydraulic cylinder is operable to power movement of the attachment. A fluid circuit communicates with the hydraulic cylinder and is configured to carry hydraulic fluid. A fluid reservoir is in communication with the fluid circuit. Accumulators that are in communication with the fluid circuit automatically store and release hydraulic fluid in response to movement of the attachment. A valve assembly controls fluid communication between the fluid reservoir and the fluid circuit in response to movement of the attachment to its second position.

An auto-powered mobile machine with controls for a riding operator and a system for carrying and making controllable use of a tool includes a wireless radio communication component that sends signals from controls in the cab to a wireless electronic control component that operates tool actuators. The wireless electronic control component is powered by a hydraulic generator that obtains power from hydraulic lines from a hydraulic pump powered by the machine's engine.

Provided is a vibration damper for a high load, including: a vibration body support portion having first shaft support portions; rotation shafts that are rotatably installed at the first shaft support portions, have eccentric portions eccentric with respect to rotation centers of the rotation shafts and are spaced a predetermined gap from each other; a support portion having second shaft support portions on which the eccentric portions are rotatably supported; an elastic member that is installed between the vibration body support portion and the support portion or between the vibration body support portion and the second shaft support portions and that elastically supports the support portion with respect to the vibration body support portion in an upward direction; and a rotation synchronization unit that is installed at the rotation shafts so as to synchronize rotation directions of the rotation shafts according to vibration. The vibration damper for a high load can be applied to various construction machines, and excavators and can prevent vibration generated from various attachments from being transferred to a boom or car body of an excavator or a construction machine.

A machine for backfilling pavement material into a trench defined within a pavement surface includes a frame defining a longitudinal axis and having at least one wheel. The frame being configured to move along the pavement surface. A hopper supported on the frame and including an inlet opening configured to receive pavement material and an outlet opening configured to discharge pavement material into the trench. The machine also includes a compactor supported on the frame and aligned with the hopper along the longitudinal axis. The compactor is configured to compact the discharged pavement material within the trench.