A frangibility device for creating a preferred breakage plane or weakness within cured columns such as rigid inclusions (RIs) and/or vibratory concrete columns (VCCs) comprises a cutting disc, an elongate strut attached to the center of the disc, and a detachable handle for turning. The disc comprises a thin geometric plate slit from center to periphery, so that a slicing wing can be bent downward at a shallow angle from the slit. The slicing wing advances the cutting disc through the cementious material of the uncured column. When the disc reaches the desired depth, the handle is removed and both disc and strut are left in place during curing.

The invention provides a transmission mechanism for an electric drill and the electric drill including the transmission mechanism. The transmission mechanism includes a primary planet carrier, a gear assembly, a secondary planet carrier, and a secondary gear assembly. The gear assembly comprises a primary gear ring and a primary gear set located in the primary gear ring. The primary gear set has two primary planetary gear sets mounted on the primary planetary gear shaft. The secondary planet carrier is provided with secondary planetary gear shafts and an output shaft. The secondary gear assembly includes a secondary gear ring and a secondary planetary gear set. The secondary planetary gear set is pivotably mounted on the secondary planetary gear shafts, an outer side of the secondary planetary gear set engages with the secondary gear ring, and an inner side of thereof engages with the sun gear.

A hole digger is provided. The hole digger includes a first handle assembly and a second handle assembly. The first handle assembly includes a first grip, a first intermediate portion, and a first blade. The first intermediate portion extends between the first grip and the first blade. The second handle assembly including a second grip, a second intermediate portion, and a second blade. The second intermediate portion extends between the second grip and the second blade. The second handle assembly is pivotally coupled to the first handle assembly such that a front surface of the first blade faces a front surface of the second blade. The first blade is not identical to the second blade. At least one stiffener is coupled to at least one of the first or second blades.

A vehicular auger implement. The implement is configured to be operated by a single operator and comprises an auger having a bit. The implement includes a four bar linkage comprising a first bar, a second bar, a third bar, and a fourth bar. The first bar is coupled to each of the second bar and a hydraulically actuated arm. The auger is operably coupled to the fourth bar. The four bar linkage is configured to convert a rotational motion of the second bar to a vertical motion of the auger. A vehicle to which the auger implement is coupled is configured to remain stationary while a hole is bored using the vertical motion of the auger.

Disclosed is a lightweight electric earth drill including a mounting plate, a drill stem and an outer shell, a motor installed on the mounting plate and configured to drive the drill stem to rotate, a rechargeable battery configured to power the motor, and a controller configured to control the motor and electrically connected to the motor and the rechargeable battery. The lightweight electric earth drill is driven by the motor and has low noise, which causes less damage to health of the workers and does not disturb the residents around the construction site. The lightweight electric earth drill is powered by rechargeable battery or mains electricity without exhaust emission. The motor is controlled by the controller and rotates forwardly and reversely, enabling the drill bit to be pulled out after drilling the earth.

A hole digger is provided. The hole digger includes a first handle assembly and a second handle assembly. The first handle assembly includes a first grip, a first intermediate portion, and a first blade. The first intermediate portion extends between the first grip and the first blade. The second handle assembly including a second grip, a second intermediate portion, and a second blade. The second intermediate portion extends between the second grip and the second blade. The second handle assembly is pivotally coupled to the first handle assembly such that a front surface of the first blade faces a front surface of the second blade. The first blade is not identical to the second blade.

An electrical handheld shovel system includes a handheld shovel with an auger bit. The shovel includes a motor configured to rotate the auger bit and a portable power source configured to power the motor. The shovel includes an input/output (I/O) device and a controller to control rotation of the auger bit. The shovel has a handle and a shovel portion. In one example, the power source is integrated into the handle, and in another example, the power source is detachably coupled to the handle. The shovel has a gearbox coupled to the motor. The shovel portion includes a blade positioned proximal to the auger bit to retain debris from the auger bit. The auger bit has a flute that is partially covered by the blade, and the blade defines a discharge opening configured to discharge at least some of the debris.

The present invention provides a drill assembly that includes a drill for drilling rock, a support for supporting the drill, and a valve for releasably securing the support and drill together. The valve is adapted to receive a fluid from a pump means and controllably provide the drill and the support with the fluid for operation of the drill and the support.

A Configurable Water Powered Digging Tool may enable a user to dig a hole in a fraction of the time and a fraction of the effort of traditional digging tools such as shovels and post hole diggers. A Configurable Water Powered Digging Tool may enable a user to purchase a Configurable Water Powered Digging Tool for a fraction of the cost of other water powered digging tools due to simple and rapid, partial disassembly, vastly reduced shipping costs, making the configurable water powered digging tool accessible to many more people. A Configurable Water Powered Digging Tool may enable a user to dig a hole more safely than with other water powered digging tools because of the integrated water valve that enables the user to keep both hands on the handle during operation and the coupler which significantly reduces the likelihood of breaking at the weld where the vertical rod meets the handle. A Configurable Water Powered Digging Tool is comprised of the minimum number of parts to achieve its purpose, thus reducing complexity, manufacturing costs, consumer costs, complexity, repairs and replacements, and increasing safety while reducing effort and time required to achieve an objective.

A digging apparatus (10, 300) is disclosed. The digging apparatus (10,300) includes a handle assembly (14, 14a, 314), a motor (32), a main switch (22, 322) electrically connected with the motor (32). The main switch (22,322) is movable between a first position in which operation of the motor (32) is allowed and a second position in which operation of the motor (32) is prevented, and a drilling bit (88, 88a, 388) is driven by the motor (32). The drilling bit (88, 88a, 388)has a longitudinal axis (P-P, M-M), and when the switch member (22, 322) is in the first position, the motor (32) is adapted to drive the drilling bit (88, 88a, 388) to rotate about the longitudinal axis (P-P, M-M) in a clockwise direction in response to pushing of the handle assembly (14, 14a, 314) in a direction towards the drilling bit (88, 88a, 388), and the motor (32) is adapted to drive the drilling bit (88, 88a, 388) to rotate about the longitudinal axis (P-P, M-M) in an anti-clockwise direction in response to pulling of the handle assembly (14, 14a, 314) in a direction away from the drilling bit (88, 88a, 388).