Described herein are tools, systems and methods for conditioning, strengthening and/or improving in situ soil geotechnical or agricultural properties while at least temporarily reducing soil density, energy requirements, and tool wear.

Described herein are tools, systems and methods for conditioning, strengthening and/or improving in situ soil geotechnical or agricultural properties while at least temporarily reducing soil density, energy requirements, and tool wear.

Disclosed embodiments include post driving implements which attach to a power machine such as a loader in order to pick up posts of various sizes and materials and/or to drive the posts into the ground. In some exemplary disclosed embodiments, the post driving implement allows a post to be picked up when positioned inline with a direction of power machine travel and allows the post to rotate under the force of gravity to a second position in which the post is inline with a pounding mechanism for pounding the post into the ground. Catch mechanisms can be included to capture a portion of the implement to maintain the post in the second position until a release action is taken or a release command is given.

A combined excavation and conveyance device for granular material.

A combined excavation and conveyance device for granular material.

A water digger comprises three equi-spaced augers meeting near a lowest point. There are three buoys serving as floats for the water digger.

A water digger comprises three equi-spaced augers meeting near a lowest point. There are three buoys serving as floats for the water digger.

A hydraulic motor circuit for driving an auger is disclosed. The circuit includes a hydraulic motor that receives oil from an oil supply via a supply line and returns oil to the oil supply via a return line. The circuit further includes a main stage pressure relief valve and a first pilot stage relief valve operable if pressure in the return line exceeds a predetermined value corresponding to an allowable inertia load acting on the motor, opening of the first pilot stage relief valve causing the main stage pressure relief valve to open, allowing flow to be diverted from the return line to the supply line and back to the motor. A control valve is configured to block flow to the first pilot stage relief valve when pressure, in the supply line is greater than pressure in the return line. If pressure in the return line exceeds pressure in the supply line, the control valve shifts open and exposes the first pilot stage relief valve to pressure in the return line.

The invention relates to a drilling tool for creating a bore in the ground, having a tubular drill shank, at least one removal device which is configured to remove ground material, a supply device for supplying a fluid through the drill shank through at least one outlet opening for the fluid into the bore and at least one mixing element which extends radially to the drill shank, is arranged on the drill shank above the removal device and is configured to mix ground material with the fluid. According to the invention, it is provided that at least one first outlet opening is arranged in the region of the removal device and at least one second outlet opening is arranged at an axial distance from the at least one first outlet opening and at least one actuating device is provided on the supply device, by means of which the at least one first outlet opening and/or the at least one second outlet opening can be blocked, wherein fluid can optionally be introduced into the bore via the at least one first outlet opening and/or the at least one second outlet opening.

A working machine includes: at least one support member connectable to a work attachment to do work by making contact with an object to be contacted; at least one hydraulic cylinder to move the work attachment connected to the at least one support member, a rod-side pressure detector to detect a rod-side hydraulic pressure of hydraulic fluid in communication with a rod-side fluid chamber of the at least one hydraulic cylinder; a bottom-side pressure detector to detect a bottom-side hydraulic pressure of hydraulic fluid in communication with a bottom-side fluid chamber of the at least one hydraulic cylinder; and a controller to calculate a relationship in pressure between the rod-side hydraulic pressure and the bottom-side hydraulic pressure and evaluate, based on the calculated relationship in pressure, a contact state which is a state of contact of the work attachment with the object.