Disclosed herein is a hand-held power tool including a motor housing, a motor in the motor housing, an auger coupled to the motor and having a rotational axis, and a first handle coupled to the motor housing and including a grip. In some embodiments, the rotational axis of the auger and an axis of the grip subtend to an acute angle.

Embodiments provide a well-drilling apparatus and a method of use.

A rechargeable angle drill includes: a motor, which includes a rotor configured to rotate about a motor rotation axis, the motor rotation axis extending in an up-down direction; a motor housing part, which houses the motor; a trigger lever, which is operated to start the motor; a handle housing part, which is disposed upward of the motor housing part and in which the trigger lever is provided; a speed reduction mechanism; a gear housing part, which is disposed downward of the motor housing part and houses the speed reduction mechanism; and a rotation output part, which protrudes forward from the gear housing part and rotates about an output rotation axis orthogonal to the motor rotation axis based on a rotational force transmitted from the motor via the speed reduction mechanism. The trigger lever is disposed upward of a center of the handle housing part in the up-down direction.

An earth auger includes a transmission assembly arranged on a connecting base, a motor assembly connected with the transmission assembly and driving the transmission assembly to rotate, a controller arranged at a first side of the transmission assembly and connected with the motor assembly, a control knob and a plurality of indicator lights arranged on a housing, and a gyroscope sensor. The controller controls a rotation of the motor assembly through an on-off of a circuit. Angular velocities and angular acceleration critical values of different gears are set through the control knob. The indicator lights are used to display a current gear, and the gyroscope sensor is arranged on a second side of the transmission assembly. The gyroscope sensor obtains angular velocity information and angular acceleration information, and feedbacks a monitored signal to the controller. When the monitored signal exceeds a preset critical value, the controller stops the motor.

This utility type patent publishes a safety control device for petrol post hold digger. It includes an operation frame, respective handles in the opposite two sides of the frame; one is throttle control handle in the right side and another is balance control handle in the left side. The safety control device is mounted on the above of the frame near left side, connected with engine in the middle place of the operation frame by one cable, with the throttle control handle in the right side by another cable. A long touch rod is installed underneath the safety control device, sticking outside of the operation frame to position A as shown in bellow picture. When post hole digger is used, drill bit is driven into soul at clockwise direction. If the drill bit touches big roots or rocks and stops rotation in a sudden, all the inertia and torque from still running engine will be thrown to the operation frame, makes it turn to opposite anticlockwise direction. Then the touch rod, usually sticking out of the frame at position A, will turn to touch leg and rotate in a certain angle towards position B. Detecting this angle change, the safety control device will act and reduce the engine torque by releasing its throttle cable to get a lower speed. As a result, to avoid the operator's danger of falling down, make the machine always operate under comfortable control. This patent is designed to be safe in operation, simple in structure and high practical in use.

Embodiments provide a well-drilling apparatus and a method of use.

A golf-course hole cutter which includes a ground penetration element having a leading surface for cutting the turf and a trailing surface for receiving an impact so as to cause the leading surface to penetrate the turf. An impactor is moveable relative to the ground penetration element having a head for impacting the trailing surface. The ground penetration element and the impactor each include at least two elongate guide elements which cooperate with each other to guide movement between the impactor and the ground penetration element.

A method for creating a weep hole is disclosed. The weep hole is drilled in an uncured, concrete, hollow core structural component having one or more external surfaces and one or more internal surfaces. The weep hole is drilled using a drilling apparatus comprising a drill, a rotating drill bit with an internal fluid passageway, a power source, and a pressurized fluid source. Loose, uncured concrete material deposited near the weep hole on the one or more internal surface as a result of drilling the weep hole is removed by releasing pressurized fluid which flows from the pressurized fluid source, through the drill and the rotating drill bit.

Provided are single and multi-stage hand-portable directional drilling devices designed to drill through space underground, particularly for drilling channels underground from within an interior building space. Also provided are improvements in a drill head providing means for removing or preventing clogging of a drill tip lubricant channel or fluid hole.

Provided are single and multi-stage hand-portable directional drilling devices designed to drill through space underground, particularly for drilling channels underground from within an interior building space. Also provided are improvements in a drill head providing means for removing or preventing clogging of a drill tip lubricant channel or fluid hole.