Abstract: A pivot head wrench includes a handle, a head, a pivot pin, a linear motion mechanism and a lock mechanism. The pivot pin connects the handle and the head. The linear motion mechanism is disposed at the handle and includes a moving path, wherein the head is disposed in the moving path. The lock mechanism includes a groove and at least one protrusion, wherein one of the groove and the protrusion is disposed at the head while the other is disposed at the linear motion mechanism for engaging with each other, and the protrusion and the groove both are disposed in the moving path.

Abstract: A quick-release angle measuring device is disclosed. The quick-release angle measuring device is applied to a hand tool, and includes a body, an angle sensor, a controller, a monitor and a power supply. The body has a quick-release part arranged on the body and for being detachable connected to the hand tool. The angle sensor is arranged in the body for detecting an angle value of the hand tool. The controller is arranged in the body and is signally connected to the angle sensor for a user to set a factor on the angle value. The monitor is arranged on the body and is signally connected to the controller for displaying the angle value. The power supply is arranged in the body for supplying electric power to the controller, the angle sensor and the monitor.

Abstract: A ratchet wrench including a holding portion, a neck portion, a switching member, a controlling rod, a blocking member, and a ratchet driving head is disclosed. The neck portion which is located at the top end of the holding portion has a cavity. The cavity has a first recess and an opening. The first recess is used for receiving a compressible elastic member and a ball. The opening is used for receiving and tightly fitting with a bendable elastic member. The switching member has a second recess to hold the bottom of the bendable elastic member, and the switching member has two adjacent arc grooves at its bottom. The controlling rod links the switching member to shift the switching member in the cavity to allow the ball to be pressed into one of the arc grooves. The controlling rod can be applied to shift, rotate or both shift and rotate the switching member in the cavity.

Abstract: An electronic torque tool includes a main body; at least one display unit disposed on the main body for displaying torque values, and several pushbuttons disposed on the main body for a user to set values to the torque tool. The electronic torque tool has resettable torque warning values, which are discontinuous values with an interval therebetween. Thanks to the interval between the discontinuous resettable torque warning values, the torque warning value of the torque tool is lower than the required tightening force. In this case, it can be avoided that a threaded member is over-tightened.

Abstract: An electronic torque wrench includes: a wrench main body including ahead section and a shank body, at least one recess being formed on a wall face of one side of the shank body, a top face of the shank body being inward depressed to form a platform, a rear end of the shank body being inward recessed to form a cavity for placing cells therein, a through hole being formed on the shank body in communication with the platform and the cavity; at least one torque sensor disposed in the recess; and an electronic operation/control device disposed on the platform. The outward protruding volume of the operation/control device is reduced to minify the total volume of the wrench and the platform and the recess enhance the flexion of the shank body.

Abstract: An electronic torque wrench includes: a shank body, a drive head being connected with a front end of the shank body; a handle having a front handle section and a rear handle section, the front handle section being connected with a rear end of the shank body, a cell room being formed in the front handle section for placing cells therein, a front end of the rear handle section being detachably connected with the rear end of the front handle section; an electronic operation/control device disposed on the shank body; and at least one torque sensor mounted on the shank body. The front and rear handle sections together form the handle for a user to hold. The rear handle section of the handle serves as a cell cap for closing the cell room so as to shorten the length of the wrench.

Abstract: A torque screwdriver contains: a main body; a driving head and a torque mechanism disposed in the main body and the driving head engages with the driving head; a grip bar installed on a top end of the main body and having two ends which are a long end and a short end so that a configuration of the grip bar and the main body is in a T shape; an insertion hole defined in a top face of the grip bar, wherein a center of the insertion hole is located at the central axis of the torque mechanism. Thereby, the torque screwdriver is operated in a narrow space easily. A force rod can be inserted into the insertion hole, and a forcing position of the force rod for driving the torque screwdriver is identical to a center of the torque mechanism, thus acquiring a precise torque value.

Abstract: An electronic torque wrench calibration device is for calibrating a torque value and a pivot angle of an electronic torque wrench. The electronic torque wrench calibration device includes a base, a driving member, a torque setting member and a dial plate. One end of the driving member is driven by a electronic torque wrench, and the other end of the driving member is pivotally connected to the base. The torque setting member is disposed on the base. The torque setting member provides the driving member with a predetermined resistance against a pivotal rotation. The dial plate is pivotally disposed on a surface of the base and linked with the driving member. The dial plate includes a plurality of angular scale markings located on a surface of the dial plate.

Abstract: A screw with a stress sensing device is disclosed. The screw includes a main body, a coaxial member and a stress sensing member. The main body has a hollow threaded hole along its axle center, and the coaxial member is applied to be screw into the threaded hole. The coaxial member includes an elongated body and two threaded parts disposed on both ends of the elongated body. The two threaded parts are applied to engage with and screwed in the threaded hole, and thus the stress applied on the main body can also be applied on the elongated body. One of the two threaded parts has a groove. The stress sensing member is arranged on the elongated body, and the signal sensed by the stress sensing member can be obtained via a wire passing through the groove.

Abstract: An angle adjusting structure of a ratchet wrench includes a shank, a driving head, a located member, a spring and a detent member. The shank includes a pivot socket and a limiting portion. The pivot socket has a first pivoting portion and a bottom surface, the limiting portion is adjoined to the pivot socket and includes a limiting hole. The driving head includes a second pivoting portion which is pivotally connected to the first pivoting portion and has a plurality of meshing teeth. The located member is slidably located on the bottom surface. The located member includes a plurality of engagement teeth and a sliding rail, the engagement teeth is for meshing the meshing teeth, the sliding rail is correspondingly located on an outside of the limiting hole. The spring is located in the limiting hole. The detent member is connected to the spring and the sliding rail.

Abstract: A torque wrench includes a hollow body, a clutch mechanism, a force-applying member, and at least one driving arm. The clutch mechanism is mounted in the hollow body. The force-applying member is pivotally mounted in the hollow body and has a first end against the clutch mechanism. The force-applying member also has a second end for the driving arm coaxially mounted onto. Thus, the torque wrench can take the overall length of the force-applying member and the driving arm as a first moment arm, and the torque wrench is easy to storage due to the detachable driving arm. In addition, the torque wrench can be increased in length by mounting a driving arm which is a plurality of rods detachably assembled with each other.

Abstract: A torque wrench includes a hollow body, a clutch mechanism, a force-applying member, and at least one driving arm. The clutch mechanism is mounted in the hollow body. The force-applying member is pivotally mounted in the hollow body and has a first end against the clutch mechanism. The force-applying member also has a second end for the driving arm coaxially mounted at. Thus, the torque wrench can take the overall length of the force-applying member and the driving arm as a first moment arm, and the torque wrench is easy to storage due to the detachable driving arm. In addition, the torque wrench can be increased in length by mounting a driving arm which is a plurality of rods detachably assembled with each other. A method of operating the torque wrench includes mounting the clutch mechanism and the force-applying member in the hollow body, and mounting the driving arm at the second end of the force-applying member. The torque wrench can be increased in length by mounting a plurality of the driving arms.

Abstract: A spring compensation structure for a torque wrench includes a body, a compensation component and an engaging head. The body has a first connecting portion. The compensation component is installed on the body and has a compensation distance, wherein one end of the compensation component is abutted on the first connecting portion of the body. The engaging head has a second connecting portion; the second connecting portion is detachably disposed on the body and is abutted on the other end of the compensation component, wherein a distance between the second connecting portion and the first connecting portion is equal to the compensation distance.

Abstract: The present invention is related to an open-end wrench including a first jaw and a second jaw and a throat section connected between rear ends of the two jaws. A toothed section is disposed on the inner side of the first jaw. The toothed section has multiple sharp teeth and a wide tooth positioned behind the sharp teeth. The wide tooth has a largest width among all the teeth. The bottommost point of the throat section is spaced from a front end of the first jaw by a first length. The bottommost point of the throat section is spaced from the tooth crest of the wide tooth by a second length, which ranges from ? to ½ the first length. The toothed section has a length, which is about ? the first length. The width of the wide tooth is 0.325 to 0.375 the length of the toothed section.

Abstract: A hand tool with adjustable swing angle includes a first and a second ends connected with each other to contain an adjustable angle. The first end has an upper wall section having a first splined hole and a lower wall section having a through hole. An annular groove is formed on a circumferential wall of the through hole. The second end is formed with a second splined hole positioned between the first splined hole and the through hole. An engagement member having a bulged section is positioned in the splined holes. An elastic restriction ring is positioned in the annular groove and has at least two holding sections positioned in the through hole. When moving the engagement member up and down, the elastic restriction ring is expanded by the bulged section, permitting the engagement member to engage with both the first and second ends or only the second end.

Abstract: The present invention is related to an open-end wrench including a first jaw and a second jaw and a throat section connected between rear ends of the two jaws. A toothed section is disposed on the inner side of the first jaw. The toothed section has multiple sharp teeth and a wide tooth positioned behind the sharp teeth. The wide tooth has a largest width among all the teeth. The bottommost point of the throat section is spaced from a front end of the first jaw by a first length. The bottommost point of the throat section is spaced from the tooth crest of the wide tooth by a second length, which ranges from ? to ½ the first length. The toothed section has a length, which is about ? the first length. The width of the wide tooth is 0.325 to 0.375 the length of the toothed section.

Abstract: A wrench includes a handle, a first driver and a second driver. The first driver and the second driver are integrally connected to the ends of the handle respectively. One opening end of the first driver and one opening end of the second driver are horizontally connected to two ends of the handle respectively. The second driver is hollow tube-shaped and has a plurality of first teeth and a plurality of second teeth located on an inner wall thereof. Two angles are between two opening ends of the second driver and the first teeth and the second teeth respectively, and the angles are from 75 degrees to 105 degrees.