Abstract: According to the present invention, an axial force of a screw which is generated by screw driving is estimated. A control part applies a predetermined torque generated by a rotation axis servomotor to a screw in a rotation direction where a screw is driven, and thereafter releases the torque. The control part then estimates an axial force of the driven screw based on fluctuation of a rotation position of the rotation axis servomotor which occurs due to the release of the torque.

Abstract: A railroad brake stick head has a head body formed of a lightweight durable material. A railroad brake stick head includes a head body having two opposing planar surfaces spaced apart by at least one sidewall that includes at least one concave sidewall region, wherein the head body is formed of a first material having a first hardness. At least one brace implant is at least partially embedded in at least one concave sidewall region, wherein each brace implant is formed of a second material having a second hardness that is harder than the first hardness. The head body includes at least one implant recess formed into the at least one concave sidewall region, and the at least one brace implant is in the at least one implant recess. Each brace implant can be coupled with the head body, such as by friction fit, adhesive, fastener, or combination thereof.

Abstract: A tool assembly (1) for tensioning tower bolts (12) of a wind turbine tower is disclosed. The tool assembly (1) comprises a connecting arrangement (2, 13, 14) configured to connect the tool assembly (1) to a part of a wind turbine tower, and a tool holding part (3) arranged to hold a tool (5) for tensioning tower bolts (12). The tool holding part (3) is attached to the connecting arrangement (2, 13, 14) in a rotatable manner, thereby allowing the tool (5) to be rotated between at least a first orientation and a second orientation. The connecting arrangement (2, 13, 14) may retain the tool assembly (1) relative to a tower wall by means of a magnet (17).

Abstract: A hot stick installation accessory is provided. The accessory includes a main housing, a base, and a tool. The main housing has a holding region that holds an electrical component. The base can be removably secured to a body of the hot stick. The base is connected to the main housing for rotation about an axis parallel to the hot stick. The tool is secured to the base so that the tool moves along the axis and is operative alignment with a first area of the holding region. The tool is securable to a hook of the hot stick so that rotation of the hot stick, and thus of the hook, results in rotation of the tool with respect to the main housing.

Abstract: An actuating tool for a switch on a transformer is provided. The switch being rotatable between a plurality of positions. The actuating tool includes an elongated pole having a predetermined length having a first end and an opposing second end. An actuator element is arranged on the first end of the pole, the actuator element being configured to engage the switch. A handle member rotatably coupled to the pole between the first end of the second end, the handle member being movably coupled to rotate between a first position substantially parallel to the pole and a second position substantially perpendicular to the pole.

Abstract: A system and method and fastening tool that utilizes ultrasonic or acoustic energy and a horn that focuses the energy into the fastener at a predetermined location in order to facilitate tightening or loosening the fastener.

Abstract: An impact contact surface shape of an impact wrench. The impact wrench comprises a rotary shaft that acts on the workpiece and an impact block sleeved on the rotary shaft to drive the rotary shaft to rotate. One end of the rotary shaft is at least configured with a stopping block to collide with the impact block. The impact block is at least configured with a locking block to collide with the stopping block. The impact contact surface comprises: at least one first contact surface located on the stopping block to contact and press the locking block and at least one second contact surface located on the locking block to contact and press the first contact surface. The first contact surface and the second contact surface are intermeshing arc shapes or cycloid shapes.

Abstract: A tool comprising an outer body with a first end and a second end, the outer body defining a longitudinal recess therein and having at least two connector link pivot points at the first end thereof, an inner body slidably received within the longitudinal recess of the outer body and having a core head extending out of the first end of the outer body, at least two jaws, each jaw having an inner pivot point and an outer pivot point, wherein the inner pivot point of each jaw pivotally connected to a corresponding core head pivot point on the core head, a connector link for each jaw, each connector link having a first end pivotally connected to the outer pivot point of the jaw and a second end pivotally connected to a corresponding connector link pivot point on the first end of the outer body, and an actuating assembly for moving the inner body relative to the outer body, whereby movement of the core head toward the outer body causes the jaws to move toward each other, and movement of the core head away from the

Abstract: A clamping connector for an autofeed attachment for a screwdriver tool. The connector has a cam action lever that actuates a clamp. The lever moves between an open position and a closed position. In the closed position, the clamp slightly deforms to hold the autofeed attachment onto an extension pole and/or the front end of a screwdriver tool (or electric drill). The connector, while either in its ‘clamped’ or ‘open’ state, includes an open central region that allows a rotatable shaft or drive bit to pass therethrough, unimpeded. The connector includes a washer with a flat portion that prevents improper axial rotation of the lever as the lever is actuated, or at any stable position. The flat extension helps guide the lever into pivoting along a longitudinal axis of the attachment. An adjustable bolt adjusts the clamping force, and secures the lever, washer, and clamp together on the autofeed attachment.

Abstract: Various embodiments of pliers and pipe wrenches are provided. Wire cutters enable a finger pivot hole to enhance the grasp of the wire cutters while rotating the tool and/or stripping wire. Pipe wrenches include different configurations of teeth to improve durability and grip on a workpiece. Pliers are provided with axial teeth to enhance gripping a workpiece in different directions. Pliers are provided with selectable mechanical advantages so that a user may select the mechanical advantage desirable for a particular application.

Abstract: A structure for replacing shear wrench head comprises a body having an inner sleeve portion, a ring groove disposed around the inner sleeve portion and a first assembly portion disposed on the inner sleeve portion; a chuck unit having a second assembly portion assembled with the first assembly portion; a central sleeve portion having at least one through hole with a locking member provided therein, a stop portion protruding inwardly is provided on the central sleeve portion; when the stop portion wedges with the first and second assembly portions, a position of the through hole approximately overlaps with the ring groove of the inner sleeve portion, so that locking members can be disposed between the ring groove and the through hole; and an outer sleeve portion slidably disposed on the central sleeve portion, and capable of optionally restricting the locking members from moving outwardly.

Abstract: A tightening device for a screw connection and a safety device assigned to the tightening device are provided. The screw connection has a bolt and a nut resting on a support surface. The tightening device has a cylinder housing, a hydraulically driven piston arranged in the cylinder housing and moveable along an axis, an exchangeable bush which can be carried on the axis and screwed to the threaded bolt, and a carrier connectable to the threaded nut by force fit or form fit. To prevent jumping of the tightening device on breakage of the bolt, the safety device has a threaded sleeve and a protective arm. The threaded sleeve is arranged outside the cylinder housing and has an internal thread for engaging a threaded bolt adjacent to the bolt. The protective arm is attached to the threaded sleeve and extends over the cylinder housing of the tightening device.

Abstract: The present application relates to the technical field of circle-producing devices, and discloses a circle-producing plier.

Abstract: The ratchet mechanism comprises a head portion with a circular central housing, the inner surface adjoining the handle portion having a further recess characterized by a plurality of engagement ramp profiles arranged not unlike low angled gear teeth within the recess arc. A pawl is located within the recess, with a corresponding plurality of engagement ramp profiles abutting the recess engagement ramp profiles and incorporating an inner facing toothed face of similar corresponding pitch and profiles as the drive element teeth in order that they can mechanically mesh into one another when ratchet is operated in the drive direction, the pawl inward force being substantially evenly distributed along the pawl toothed front face by the use of several similar engagement ramp profiles urging all the pawl teeth into the required locking engagement with the drive element simultaneously.

Abstract: Pliers having two arms which cross at a pivot bolt, one of which being movable and the other being stationary, with grip sections being formed on one side of the pivot bolt, and interacting jaws being formed as the beak on the other side of the pivot bolt. The stationary arm further has a longitudinal slot with teeth, and the pivot bolt, which is located in a receptacle, is movable about the longitudinal axis thereof, counter to the force of a spring, out of engagement with the teeth into a release position and being held in the direction of the longitudinal axis with the aid of a blocking projection, which interacts with a blocking part in the receptacle. The blocking projection and the blocking part are designed to run over each other during assembly, overcoming the effect of the spring.

Abstract: A manual tool for expanding and manipulating steel cables of the “clamp” type including two symmetrical flat steel pieces assembled with a bolt, each of which has a semicircular head with three equidistant perforations from which emerge three tubular extensions or cylinders perpendicular to the surface of the semicircular head, heads which in closed clamp position form a complete circle with six equidistant tubular projections and a central hole, both extending in their handles to open and close and to be able to expand and manipulate steel cables composed of a steel core and six strands of coiled metal wires that wrap said steel core, which cable will be provided with a chain sling with hook and a steel socket that has bronze wedges inserted for its adjustment.

Abstract: A coring tool for a coaxial cable has a tool holder and cutter bit mounted to the tool holder. The cutter bit is constructed from a conductive metal or alloy which is durable for rotatably drilling out and removing a dielectric core surrounding a central conductor of the coaxial cable, as the central conductor is preserved by passing into a central bore formed in the cutter bit. The cutter bit also includes a non-conductive sleeve or coating which prevents the cutter bit from electrically interconnecting, e.g., shorting, the central conductor to an outer conductor of the coaxial cable.

Abstract: A hydraulic torque wrench comprises a ratchet link, a power head, and a signal carrying connector for connection to a controller. The ratchet link includes a housing and a drive plate mounted for rotation about an axis within the housing, the drive plate mounting one part of a first part of a ratchet drive. A socket is mounted for rotation within the housing, the socket providing a second part of the ratchet drive. During rotation of the drive plate in one direction the first and second part of the ratchet drive engage each other to cause rotation of the socket with the drive plate and during rotation of the drive plate in a second direction one of the first and second parts of the ratchet drive rides over the other such that the socket remains stationary while the drive plate rotates. The power head includes a piston and cylinder and hydraulic connections adapted for connection to a source of pressurised hydraulic fluid.

Abstract: A rapid adjustable wrench includes a body, a movable jaw, and an engaging device. The body has a fixed jaw, a sliding groove, and a containing recess. The movable jaw includes a sliding portion movably arranged in the sliding groove and a first toothed portion adjacent to the sliding portion. The engaging device includes an engaging member and a toggle switch. The engaging member is arranged in the containing recess and has a second toothed portion selectively engaged with the first toothed portion. One end of the toggle switch is connected to the engaging member. The toggle switch is able to drive the engaging member to move between an engaging position and a releasing position.

Abstract: A ratchet mechanism of a reversible tool head can include a driving member extending along a first longitudinal axis. The driving member is configured to be driven by a motor or other power source. A driving head can extend along a second longitudinal axis. The first longitudinal axis extends transversely to the second longitudinal axis. The driving member is configured to operatively connect to the driving head. A pawl positioner can surround a portion of the driving head and can be fixedly attached to the driving head. A pawl can include a plurality of teeth selectively engageable with teeth of the tool head. The pawl positioner can be configured to automatically reposition the pawl relative to the driving head when a rotational drive direction of the driving member is reversed.