A torque capacity expandable device and method for a torque multiplier are introduced. The device includes a connection sleeve and a torque multiplier. The connection sleeve, fitted to a torque wrench and the torque multiplier and fastened, has a force-applied end corresponding in dimensions to a force-applying end of the torque wrench and has another end corresponding in dimensions to the force-applied end of the torque multiplier. An integral fastening mechanism is integrally fitted to or formed with each of the two ends of the torque multiplier. Its force-applied end fastening mechanism has the same dimensions as the force-applying end fastening mechanism of connection sleeve. Its force-applying end fastening mechanism has the same dimensions as the force-applied end fastening mechanism of a reaction arm disposed at the force-applying end fastening mechanism of torque multiplier.

A torque capacity expandable device and method for a torque multiplier are introduced. The device includes a connection sleeve and a torque multiplier. The connection sleeve, fitted to a torque wrench and the torque multiplier and fastened, has a force-applied end corresponding in dimensions to a force-applying end of the torque wrench and has another end corresponding in dimensions to the force-applied end of the torque multiplier. An integral fastening mechanism is integrally fitted to or formed with each of the two ends of the torque multiplier. Its force-applied end fastening mechanism has the same dimensions as the force-applying end fastening mechanism of connection sleeve. Its force-applying end fastening mechanism has the same dimensions as the force-applied end fastening mechanism of a reaction arm disposed at the force-applying end fastening mechanism of torque multiplier.

.[.The present invention discloses a.]. .Iadd.A .Iaddend.bidirectional mechanical converting unit.[., comprising.]. .Iadd.includes.Iaddend.: a main shaft; a driving mechanism, which including a driving .[.means.]. .Iadd.assembly .Iaddend.and a reversing .[.means.]. .Iadd.assembly .Iaddend.which are coupled to each other; and a rotation .[.means.]. .Iadd.assembly .Iaddend.for inputting torque, an rotation axis of the rotation .[.means.]. .Iadd.assembly .Iaddend.being coaxial with the main shaft, the rotation .[.means.]. .Iadd.assembly .Iaddend.and the driving mechanism being coupled to each other, and the driving mechanism delivering the torque to output at the main shaft at a predetermined direction, no matter in which direction the rotation .[.means.]. .Iadd.assembly .Iaddend.rotates; wherein the predetermined direction can be switched via the reversing .[.means.]. .Iadd.assembly.Iaddend.. .[.The present invention is simple structured, not only can efficiently utilizes the movements of the rotation means in either way, but also can switch the rotation direction of the output shaft conveniently upon demand, with easy operations..].

Methods and associated system for calibrating a torque device are provided. The method includes (I) providing a master torque tool having an accepted calibration, (II) attaching the torque device to be calibrated to an input shaft of a testing and calibration system, (III) energizing the torque device to a free spin under a no load and zero torque condition, (IV) performing a run down test by activating a torque engagement mechanism to transferred torque from the torque device to the master torque tool, (V) measuring a torque value from the master torque tool, the torque device, and the rotary inline torque transducer to generate a data set, (IX) repeating steps (IV) to generate a plurality of data sets and (V), and (VI) generating new calibration factors for input into a programmable control system of the torque device based on the plurality of data sets with a software package.

An attaching and detaching tool for removing a flywheel connected to a crankshaft of an internal combustion engine using a nut, in which the flywheel is removed by pulling the flywheel with an axial force generated in the nut when the nut is loosened, is provided. A socket wrench is coupled to a nut connected to a crankshaft and a flywheel is coupled to a puller assembled to the socket wrench via a bolt, and then the socket wrench is rotated while the rotation of the puller is stopped by a spinner handle, whereby the nut is loosened and the flywheel is removed.

An attaching and detaching tool for removing a flywheel connected to a crankshaft of an internal combustion engine using a nut, in which the flywheel is removed by pulling the flywheel with an axial force generated in the nut when the nut is loosened, is provided. A socket wrench is coupled to a nut connected to a crankshaft and a flywheel is coupled to a puller assembled to the socket wrench via a bolt, and then the socket wrench is rotated while the rotation of the puller is stopped by a spinner handle, whereby the nut is loosened and the flywheel is removed.

Provided is a torque wrench for an implant procedure including: a first body having a predetermined length, and including a head portion having an end to which a torque wrench driver bit is coupled; at least one second body having a predetermined length, provided at one side of the first body, and including a coupling portion formed in a longitudinal direction thereof; and a second shaft rotatably coupled to the coupling portion of the second body, including a second gear provided at one end thereof and a knob provided at the other end thereof, and configured such that, in response to rotation of the knob, the second shaft transmits torque to the torque wrench driver bit through the first gear engaged with the second gear.

Disclosed is a manual tool outputting torque bidirectionally. The manual tool includes a handle (100), a main shaft (200), a transmission device (300), a ratchet tooth device (400) and a ratchet wheel switching device (500), wherein when a ratchet wheel switching ring (501) of the ratchet wheel switching device (500) is located at a clockwise position, no matter whether the handle (100) rotates in a clockwise direction or in an anticlockwise direction, the main shaft (200) rotates in the clockwise direction to output torque from the handle (100); when the ratchet wheel switching ring (501) of the ratchet wheel switching device (500) is located at an anticlockwise position, no matter whether the handle (100) rotates in the clockwise direction or in the anticlockwise direction, the main shaft (200) rotates in the anticlockwise direction to output torque from the handle (100); and when the ratchet wheel switching ring (501) of the ratchet wheel switching device (500) is located at a fixed position, the main shaft (200) and the handle (100) rotate in the same direction to output torque from the handle (100), with the output torque being large. The manual tool outputting torque bidirectionally can output the torque by bidirectional rotation of the handle, with the output torque being large, while torque output by an existing screwdriver having bidirectional output is small.

Disclosed is a manual tool outputting torque bidirectionally. The manual tool includes a handle (100), a main shaft (200), a transmission device (300), a ratchet tooth device (400) and a ratchet wheel switching device (500), wherein when a ratchet wheel switching ring (501) of the ratchet wheel switching device (500) is located at a clockwise position, no matter whether the handle (100) rotates in a clockwise direction or in an anticlockwise direction, the main shaft (200) rotates in the clockwise direction to output torque from the handle (100); when the ratchet wheel switching ring (501) of the ratchet wheel switching device (500) is located at an anticlockwise position, no matter whether the handle (100) rotates in the clockwise direction or in the anticlockwise direction, the main shaft (200) rotates in the anticlockwise direction to output torque from the handle (100); and when the ratchet wheel switching ring (501) of the ratchet wheel switching device (500) is located at a fixed position, the main shaft (200) and the handle (100) rotate in the same direction to output torque from the handle (100), with the output torque being large. The manual tool outputting torque bidirectionally can output the torque by bidirectional rotation of the handle, with the output torque being large, while torque output by an existing screwdriver having bidirectional output is small.

A driving tool for driving jackset screws includes an input shaft, output shafts, gear assembly, driver heads, and a yoke. The input shaft is configured to receive torque. The first and second output shafts are operably connected to the input shaft via the gear assembly. The gear assembly includes a differential gear assembly rotatably engaged with the input shaft. The first driver head is attached to a distal end of the first output shaft. The second driver head is attached to a distal end of the second output shaft. The yoke is connected to and extends between ends of the first and second output shafts. The yoke defines a position of the distal ends of the first and second shafts relative to each other and is configured to adjust a distance between the first and second driver heads.